From rbethman at comcast.net  Fri Aug  1 11:22:26 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 11:22:26 -0400
Subject: [AMRadio] Heavy metal sale Update
Message-ID: <53DBB0B2.3020308@comcast.net>

There is perhaps a misconception as to WHAT a T-213 is.

A T-213 is the very latest version of the BC-610.

I almost every way, other than the porcelain terminals being removed and 
replaces with an SO-239, they are completely identical!

This one is S/N 65, Made by B&W, and is fully functional.



1) The T-213 went through Depot in '59.  Lon Cottingham and Robert Downs 
rescued it still in the crate.  It had been destined for disposal at sea.

2) It comes with all original issue cables.

I am open to the idea of "some" trading.

A clean R-390A that is fully functional will drop the asking by $800.

I would also apply the same to a clean and fully functional SP-600.

I am NOT leaving Amateur Radio!  I simply can no longer deal with the 
size and mass of these two beasts!

They are standing on a four wheeled moving man dollies, and those will 
go with them.

I have a substantial hand truck that handles 700lbs, and straps that 
take 400lbs a piece.

Those will be available to move them from the Den and out to your 
provided transport means.  However, these items won't go with.

One additional piece goes with this package, and it is one JB-70 that 
needs a top plate made for it, and requires rewiring just inside, as 
where it came from had an issue with rodents that decided that 
insulation was delicious!


From rbethman at comcast.net  Fri Aug  1 14:15:49 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 14:15:49 -0400
Subject: [AMRadio] Getting back on AM
Message-ID: <53DBD955.3050502@comcast.net>

Well,

I know to many, that this is heresy.  However, I acquired a Kenwood 
TS-2000 just completely re-manufactured by Kenwood.

It will do 25W on AM.  It will do this from 160m through 6m.

I will follow it with an Amp Supply LK-500ZB.  I already am more than 
aware of the issues of AM with SS in lieu of tubes!

It shouldn't take very long at all to get the mic gain issue under control!

I've been that path before.  I've done it with a DX-60 and with a 
Kenwood TS-930SAT.  The latter finally went toes up!

I can also tie my SP-600 into all this as a separate receiver.  It 
certainly must have better receiving sensitivity than the Kenwood.

I may or may not venture into 6m.  I don't know how that will fit into 
the antenna farm.

I am adding a 40m Double Bazooka to the morass of wires.

Masts from Max Gain are on order.  This will put everything up about 
15ft higher than I am now.

It will also allow for a flatter dipole setup in lieu of this sick 
inverted vee affair that I'm using now.

The final piece to connect the Kenwood to the Amplifier *just* arrived 
as I was composing this.

It is a package that allows these SS rigs to key Amps that use 
120VAC/VDC to safely key them without damage.

Now it is only a matter of wiring it all together, and solder one dumb 
wire in the amp that came loose from its relay, and button it all up.

Will be trying things out not long from now.

Catch y'all on the air!

Bob - N0DGN

From manualman at juno.com  Fri Aug  1 15:39:12 2014
From: manualman at juno.com (manualman at juno.com)
Date: Fri, 1 Aug 2014 15:39:12 -0400
Subject: [AMRadio] Getting back on AM
Message-ID: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>

I've heard and worked a number of guys using the TS-2000 on AM over the
years and it sounds great.
You should have a lot of fun with the rig and it only weighs 17 pounds.

Pete, wa2cwa

On Fri, 01 Aug 2014 14:15:49 -0400 rbethman <rbethman at comcast.net>
writes:
> Well,
> 
> I know to many, that this is heresy.  However, I acquired a Kenwood 
> 
> TS-2000 just completely re-manufactured by Kenwood.
> 
> It will do 25W on AM.  It will do this from 160m through 6m.
> 
> I will follow it with an Amp Supply LK-500ZB.  I already am more 
> than 
> aware of the issues of AM with SS in lieu of tubes!
> 
> It shouldn't take very long at all to get the mic gain issue under 
> control!
> 
> I've been that path before.  I've done it with a DX-60 and with a 
> Kenwood TS-930SAT.  The latter finally went toes up!
> 
> I can also tie my SP-600 into all this as a separate receiver.  It 
> certainly must have better receiving sensitivity than the Kenwood.
> 
> I may or may not venture into 6m.  I don't know how that will fit 
> into 
> the antenna farm.
> 
> I am adding a 40m Double Bazooka to the morass of wires.
> 
> Masts from Max Gain are on order.  This will put everything up about 
> 
> 15ft higher than I am now.
> 
> It will also allow for a flatter dipole setup in lieu of this sick 
> inverted vee affair that I'm using now.
> 
> The final piece to connect the Kenwood to the Amplifier *just* 
> arrived 
> as I was composing this.
> 
> It is a package that allows these SS rigs to key Amps that use 
> 120VAC/VDC to safely key them without damage.
> 
> Now it is only a matter of wiring it all together, and solder one 
> dumb 
> wire in the amp that came loose from its relay, and button it all 
> up.
> 
> Will be trying things out not long from now.
> 
> Catch y'all on the air!
> 
> Bob - N0DGN


From k2owr at comcast.net  Fri Aug  1 17:04:22 2014
From: k2owr at comcast.net (k2owr at comcast.net)
Date: Fri, 1 Aug 2014 21:04:22 +0000 (UTC)
Subject: [AMRadio] Getting back on AM
In-Reply-To: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>
References: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>
Message-ID: <395091101.2620392.1406927062208.JavaMail.root@comcast.net>

Likely you will encounter the AM guys who try to entice u to restore one of the antiques. I did it and had a year of fun getting my Valiant 2 up and running. Bill K4owr

Sent from Xfinity Connect Mobile App

-----Original Message-----
From: manualman
To: amradio
Sent: August 1, 2014, 3:41 PM
Subject: Re: [AMRadio] Getting back on AM

I've heard and worked a number of guys using the TS-2000 on AM over the
years and it sounds great.
You should have a lot of fun with the rig and it only weighs 17 pounds.

Pete, wa2cwa

On Fri, 01 Aug 2014 14:15:49 -0400 rbethman <rbethman at comcast.net>
writes:
> Well,
>> I know to many, that this is heresy.  However, I acquired a Kenwood 
>> TS-2000 just completely re-manufactured by Kenwood.
>> It will do 25W on AM.  It will do this from 160m through 6m.
>> I will follow it with an Amp Supply LK-500ZB.  I already am more 
> than 
> aware of the issues of AM with SS in lieu of tubes!
>> It shouldn't take very long at all to get the mic gain issue under 
> control!
>> I've been that path before.  I've done it with a DX-60 and with a 
> Kenwood TS-930SAT.  The latter finally went toes up!
>> I can also tie my SP-600 into all this as a separate receiver.  It 
> certainly must have better receiving sensitivity than the Kenwood.
>> I may or may not venture into 6m.  I don't know how that will fit 
> into 
> the antenna farm.
>> I am adding a 40m Double Bazooka to the morass of wires.
>> Masts from Max Gain are on order.  This will put everything up about 
>> 15ft higher than I am now.
>> It will also allow for a flatter dipole setup in lieu of this sick 
> inverted vee affair that I'm using now.
>> The final piece to connect the Kenwood to the Amplifier *just* 
> arrived 
> as I was composing this.
>> It is a package that allows these SS rigs to key Amps that use 
> 120VAC/VDC to safely key them without damage.
>> Now it is only a matter of wiring it all together, and solder one 
> dumb 
> wire in the amp that came loose from its relay, and button it all 
> up.
>> Will be trying things out not long from now.
>> Catch y'all on the air!
>> Bob - N0DGN

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Archives: http://mailman.qth.net/pipermail/amradio/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From amradio at mailman.qth.net  Fri Aug  1 17:29:35 2014
From: amradio at mailman.qth.net (Mel Farrer via AMRadio)
Date: Fri, 1 Aug 2014 14:29:35 -0700
Subject: [AMRadio] Getting back on AM
In-Reply-To: <395091101.2620392.1406927062208.JavaMail.root@comcast.net>
References: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>
	<395091101.2620392.1406927062208.JavaMail.root@comcast.net>
Message-ID: <1406928575.30781.YahooMailNeo@web163503.mail.gq1.yahoo.com>

Fear not warrior,AM really is for everyone.? All methods that generate a clean, smooth, full sounding audio are welcome.? Be it my era, yours, or SDR.? If it is AM and sounds good, you are in.? Welcome back aboard.

Mel, K6KBE
OK, KX3 3 watts AM
K3 25 watts AM + EMTRON DX-2SP +++++
Bauer 707? 375 Watts AM, YEP it all works.



On Friday, August 1, 2014 2:06 PM, "k2owr at comcast.net" <k2owr at comcast.net> wrote:
 


Likely you will encounter the AM guys who try to entice u to restore one of the antiques. I did it and had a year of fun getting my Valiant 2 up and running. Bill K4owr

Sent from Xfinity Connect Mobile App

-----Original Message-----
From: manualman
To: amradio
Sent: August 1, 2014, 3:41 PM
Subject: Re: [AMRadio] Getting back on AM

I've heard and worked a number of guys using the TS-2000 on AM over the
years and it sounds great.
You should have a lot of fun with the rig and it only weighs 17 pounds.

Pete, wa2cwa

On Fri, 01 Aug 2014 14:15:49 -0400 rbethman <rbethman at comcast.net>
writes:
> Well,
>> I know to many, that this is heresy.? However, I acquired a Kenwood 
>> TS-2000 just completely re-manufactured by Kenwood.
>> It will do 25W on AM.? It will do this from 160m through 6m.
>> I will follow it with an Amp Supply LK-500ZB.? I already am more 
> than 
> aware of the issues of AM with SS in lieu of tubes!
>> It shouldn't take very long at all to get the mic gain issue under 
> control!
>> I've been that path before.? I've done it with a DX-60 and with a 
> Kenwood TS-930SAT.? The latter finally went toes up!
>> I can also tie my SP-600 into all this as a separate receiver.? It 
> certainly must have better receiving sensitivity than the Kenwood.
>> I may or may not venture into 6m.? I don't know how that will fit 
> into 
> the antenna farm.
>> I am adding a 40m Double Bazooka to the morass of wires.
>> Masts from Max Gain are on order.? This will put everything up about 
>> 15ft higher than I am now.
>> It will also allow for a flatter dipole setup in lieu of this sick 
> inverted vee affair that I'm using now.
>> The final piece to connect the Kenwood to the Amplifier *just* 
> arrived 
> as I was composing this.
>> It is a package that allows these SS rigs to key Amps that use 
> 120VAC/VDC to safely key them without damage.
>> Now it is only a matter of wiring it all together, and solder one 
> dumb 
> wire in the amp that came loose from its relay, and button it all 
> up.
>> Will be trying things out not long from now.
>> Catch y'all on the air!
>> Bob - N0DGN

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Archives: http://mailman.qth.net/pipermail/amradio/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Archives: http://mailman.qth.net/pipermail/amradio/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From rbethman at comcast.net  Fri Aug  1 17:48:45 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 17:48:45 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <395091101.2620392.1406927062208.JavaMail.root@comcast.net>
References: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>
	<395091101.2620392.1406927062208.JavaMail.root@comcast.net>
Message-ID: <53DC0B3D.7000006@comcast.net>

I'd say that there is definitely a lack of understanding.

I'm doing what I can to get RID of a huge antique!  That would be my T-213.

It has a 400W carrier, and modulates far beyond what is legal unless I 
choke the mike gain.

Bob - N0DGN



On 8/1/2014 5:04 PM, k2owr at comcast.net wrote:
> Likely you will encounter the AM guys who try to entice u to restore one of the antiques. I did it and had a year of fun getting my Valiant 2 up and running. Bill K4owr
>
> Sent from Xfinity Connect Mobile App


From amradio at mailman.qth.net  Fri Aug  1 17:56:19 2014
From: amradio at mailman.qth.net (Mel Farrer via AMRadio)
Date: Fri, 1 Aug 2014 14:56:19 -0700
Subject: [AMRadio] Getting back on AM
In-Reply-To: <53DC0B3D.7000006@comcast.net>
References: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>	<395091101.2620392.1406927062208.JavaMail.root@comcast.net>
	<53DC0B3D.7000006@comcast.net>
Message-ID: <1406930179.99938.YahooMailNeo@web163505.mail.gq1.yahoo.com>

Sorry Bob,

Just wanted to make it clear,. at least for me, AM is AM if it sounds good.? I still have room in my wine cellar for my Heavy Metal.? To each his own,? Cheers,
Mel, K6KBE



On Friday, August 1, 2014 2:48 PM, rbethman <rbethman at comcast.net> wrote:
 


I'd say that there is definitely a lack of understanding.

I'm doing what I can to get RID of a huge antique!? That would be my T-213.

It has a 400W carrier, and modulates far beyond what is legal unless I 
choke the mike gain.

Bob - N0DGN




On 8/1/2014 5:04 PM, k2owr at comcast.net wrote:
> Likely you will encounter the AM guys who try to entice u to restore one of the antiques. I did it and had a year of fun getting my Valiant 2 up and running. Bill K4owr
>
> Sent from Xfinity Connect Mobile App

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Archives: http://mailman.qth.net/pipermail/amradio/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From manualman at juno.com  Fri Aug  1 17:58:51 2014
From: manualman at juno.com (manualman at juno.com)
Date: Fri, 1 Aug 2014 17:58:51 -0400
Subject: [AMRadio] Getting back on AM
Message-ID: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>

If anyone tries to entice you to restore some "antique" to get real "AM",
you can always tell them to get a life. I find it's a lot more fun to
play on the radio, then to be sticking my nose and soldering iron, for
endless amounts of time into some old rig, trying to bring it back to
life. Been there and done that. No reason to repeat my history lesson.

Pete, wa2cwa

On Fri, 01 Aug 2014 17:48:45 -0400 rbethman <rbethman at comcast.net>
writes:
> I'd say that there is definitely a lack of understanding.
> 
> I'm doing what I can to get RID of a huge antique!  That would be my 
> T-213.
> 
> It has a 400W carrier, and modulates far beyond what is legal unless 
> I 
> choke the mike gain.
> 
> Bob - N0DGN
> 
> 
> 
> On 8/1/2014 5:04 PM, k2owr at comcast.net wrote:
> > Likely you will encounter the AM guys who try to entice u to 
> restore one of the antiques. I did it and had a year of fun getting 
> my Valiant 2 up and running. Bill K4owr


From rbethman at comcast.net  Fri Aug  1 18:26:23 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 18:26:23 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <1406930179.99938.YahooMailNeo@web163505.mail.gq1.yahoo.com>
References: <AABK7Z5J6AHAF5RJ@smtpout01.vgs.untd.com>	<395091101.2620392.1406927062208.JavaMail.root@comcast.net>
	<53DC0B3D.7000006@comcast.net>
	<1406930179.99938.YahooMailNeo@web163505.mail.gq1.yahoo.com>
Message-ID: <53DC140F.6050501@comcast.net>

Mel,

You weren't the one that commented that folks would try to get me to 
restore an antique!

My issue is that the specific antique I'm try to get someone to decide 
they want, is simply way to heavy, even when sitting on a moving man 
dolly.  The arthritis in the entire spine has just gotten to where I 
just can't drag that across the carpet any longer.

I could go plug it all together and have a ball being one of the "Tall 
Ships".  The mind is really willing, but the body then demands too many 
pain killers.  Even though I'm only 64, I paid my body dues with 20+ 
years Military service, doing those things that the young always do, yet 
never grasp the results until way too late!

I have the room.  It is 27ft X 24 ft.  We simply have to take the hand 
that gets dealt in life.

Bob - N0DGN


On 8/1/2014 5:56 PM, Mel Farrer wrote:
> Sorry Bob,
>
> Just wanted to make it clear,. at least for me, AM is AM if it sounds 
> good.  I still have room in my wine cellar for my Heavy Metal.  To 
> each his own,  Cheers,
> Mel, K6KBE
>
>
> On Friday, August 1, 2014 2:48 PM, rbethman <rbethman at comcast.net> wrote:
>
>
> I'd say that there is definitely a lack of understanding.
>
> I'm doing what I can to get RID of a huge antique!  That would be my 
> T-213.
>
> It has a 400W carrier, and modulates far beyond what is legal unless I
> choke the mike gain.
>
> Bob - N0DGN


From rbethman at comcast.net  Fri Aug  1 18:31:38 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 18:31:38 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>
References: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>
Message-ID: <53DC154A.2060607@comcast.net>

Pete,

That antique is ready to connect all back up and let her rip!

The issue is trying to move the beast even on the moving man dolly!

400lbs on a carpet, the entire spine loaded with arthritis, the mind is 
willing and able!  The body has issues!

As to sticking my nose inside and melting the solder, I still do so 
quite willingly!

Just spent time last year getting an HRO-50 recapped and running last year.

Bob - N0DGN


On 8/1/2014 5:58 PM, manualman at juno.com wrote:
> If anyone tries to entice you to restore some "antique" to get real "AM",
> you can always tell them to get a life. I find it's a lot more fun to
> play on the radio, then to be sticking my nose and soldering iron, for
> endless amounts of time into some old rig, trying to bring it back to
> life. Been there and done that. No reason to repeat my history lesson.
>
> Pete, wa2cwa
>
> On Fri, 01 Aug 2014 17:48:45 -0400 rbethman <rbethman at comcast.net>
> writes:
>> I'd say that there is definitely a lack of understanding.
>>
>> I'm doing what I can to get RID of a huge antique!  That would be my
>> T-213.
>>
>> It has a 400W carrier, and modulates far beyond what is legal unless
>> I
>> choke the mike gain.
>>
>> Bob - N0DGN


From ranchorobbo at gmail.com  Fri Aug  1 19:28:41 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Fri, 1 Aug 2014 18:28:41 -0500
Subject: [AMRadio] Getting back on AM
In-Reply-To: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>
References: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>
Message-ID: <CALWD7Z4M-oJwzRsvFZS_BO3gQ50QvNVDBEpV_fOGdM46iEAOhA@mail.gmail.com>

On Fri, Aug 1, 2014 at 4:58 PM,  <manualman at juno.com> wrote:
> If anyone tries to entice you to restore some "antique" to get real "AM",
> you can always tell them to get a life.

Bob doesn't have to do that.  He has a legitimate and acceptable excuse.

73
Rob
K5UJ

From manualman at juno.com  Fri Aug  1 20:22:43 2014
From: manualman at juno.com (manualman at juno.com)
Date: Fri, 1 Aug 2014 20:22:43 -0400
Subject: [AMRadio] Getting back on AM
Message-ID: <AABK72M5RASUC5S2@smtpout03.vgs.untd.com>

Yep, I understand the reasons for selling off the T-213. I'm also giving
consideration to selling off my Johnson Thunderbolt and few other 100+
pound rigs that I can hardly lift or push, plus most of them are just
dust catchers these days. I still think you'll have a lot of fun with the
TS-2000 on AM, CW, SSB, and some digital modes if you desire. The rig is
very versatile.

Pete, wa2cwa

On Fri, 01 Aug 2014 18:31:38 -0400 rbethman <rbethman at comcast.net>
writes:
> Pete,
> 
> That antique is ready to connect all back up and let her rip!
> 
> The issue is trying to move the beast even on the moving man dolly!
> 
> 400lbs on a carpet, the entire spine loaded with arthritis, the mind 
> is 
> willing and able!  The body has issues!
> 
> As to sticking my nose inside and melting the solder, I still do so 
> 
> quite willingly!
> 
> Just spent time last year getting an HRO-50 recapped and running 
> last year.
> 
> Bob - N0DGN
> 
> 
> On 8/1/2014 5:58 PM, manualman at juno.com wrote:
> > If anyone tries to entice you to restore some "antique" to get 
> real "AM",
> > you can always tell them to get a life. I find it's a lot more fun 
> to
> > play on the radio, then to be sticking my nose and soldering iron, 
> for
> > endless amounts of time into some old rig, trying to bring it back 
> to
> > life. Been there and done that. No reason to repeat my history 
> lesson.
> >
> > Pete, wa2cwa
> >
> > On Fri, 01 Aug 2014 17:48:45 -0400 rbethman 
> <rbethman at comcast.net>
> > writes:
> >> I'd say that there is definitely a lack of understanding.
> >>
> >> I'm doing what I can to get RID of a huge antique!  That would be 
> my
> >> T-213.
> >>
> >> It has a 400W carrier, and modulates far beyond what is legal 
> unless
> >> I
> >> choke the mike gain.
> >>
> >> Bob - N0DGN


From rbethman at comcast.net  Fri Aug  1 20:28:43 2014
From: rbethman at comcast.net (rbethman)
Date: Fri, 01 Aug 2014 20:28:43 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <CALWD7Z4M-oJwzRsvFZS_BO3gQ50QvNVDBEpV_fOGdM46iEAOhA@mail.gmail.com>
References: <AABK72DPGAGV3EFJ@smtpout01.vgs.untd.com>
	<CALWD7Z4M-oJwzRsvFZS_BO3gQ50QvNVDBEpV_fOGdM46iEAOhA@mail.gmail.com>
Message-ID: <53DC30BB.4060308@comcast.net>

Rob,

You certainly have that correct!

I've restored antiques for a long time.

Dumping a 400W carrier only means that I'll end up taking Vicodin or 
some such to get through the stupid arthrotis from dragging the 400lb 
monster back to the operating position.

That critter would put me back into the Tall Ship category real fast!

I've simply gotten very tired of the pain levels I deal with.

I will continue to restore antiques, just not anything over maybe 85lbs.

Then I'd only groan some.

I guess folks didn't read my heavy metal sale post.

Such is life!

Bob - N0DGN



On 8/1/2014 7:28 PM, Rob Atkinson wrote:
> On Fri, Aug 1, 2014 at 4:58 PM,  <manualman at juno.com> wrote:
>> If anyone tries to entice you to restore some "antique" to get real "AM",
>> you can always tell them to get a life.
> Bob doesn't have to do that.  He has a legitimate and acceptable excuse.
>
> 73
> Rob
> K5UJ


From w5jo at brightok.net  Fri Aug  1 22:23:34 2014
From: w5jo at brightok.net (Jim Wilhite)
Date: Fri, 1 Aug 2014 21:23:34 -0500
Subject: [AMRadio] Getting back on AM
In-Reply-To: <53DBD955.3050502@comcast.net>
References: <53DBD955.3050502@comcast.net>
Message-ID: <B1697F26DF2C4720B043E4249CCCCE55@JimPC>

Operating AM is as more about fraternity than equipment.  I enjoy operating 
my GK 500 but have used modern equipment with an amplifier.  No one really 
cares what equipment you use, only the content of your conversation.  At 
least that is my feeling.

I hope to run across you on the air soon Bob.

Jim
W5JO

-----Original Message----- 


Well,

I know to many, that this is heresy.  However, I acquired a Kenwood
TS-2000 just completely re-manufactured by Kenwood.

It will do 25W on AM.  It will do this from 160m through 6m.

I will follow it with an Amp Supply LK-500ZB.  I already am more than
aware of the issues of AM with SS in lieu of tubes!



From cw_de_n5op at sbcglobal.net  Fri Aug  1 22:30:50 2014
From: cw_de_n5op at sbcglobal.net (Kim Elmore)
Date: Fri, 01 Aug 2014 21:30:50 -0500
Subject: [AMRadio] Getting back on AM
In-Reply-To: <B1697F26DF2C4720B043E4249CCCCE55@JimPC>
References: <53DBD955.3050502@comcast.net>
	<B1697F26DF2C4720B043E4249CCCCE55@JimPC>
Message-ID: <53DC4D5A.4090002@sbcglobal.net>

Yes! What Jim said! In spades!

Kim N5OP

On 8/1/2014 9:23 PM, Jim Wilhite wrote:
> Operating AM is as more about fraternity than equipment.  I enjoy 
> operating my GK 500 but have used modern equipment with an amplifier.  
> No one really cares what equipment you use, only the content of your 
> conversation.  At least that is my feeling.
>
> I hope to run across you on the air soon Bob.
>
> Jim
> W5JO
>
> -----Original Message-----
>
> Well,
>
> I know to many, that this is heresy.  However, I acquired a Kenwood
> TS-2000 just completely re-manufactured by Kenwood.
>
> It will do 25W on AM.  It will do this from 160m through 6m.
>
> I will follow it with an Amp Supply LK-500ZB.  I already am more than
> aware of the issues of AM with SS in lieu of tubes!
>
>
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //-- Attributed to many people; it's so true that 
it doesn't matter who said it./


From pulsarxp at embarqmail.com  Fri Aug  1 22:34:23 2014
From: pulsarxp at embarqmail.com (L L bahr )
Date: Fri, 1 Aug 2014 22:34:23 -0400 (EDT)
Subject: [AMRadio] Getting back on AM
In-Reply-To: <B1697F26DF2C4720B043E4249CCCCE55@JimPC>
Message-ID: <336516015.27532271.1406946863843.JavaMail.root@embarqmail.com>

Hi Jim,

Yes, you got that right.  I enjoy AM but enjoy it most when having QSOs with friends who are also AMers.  I also enjoy working and restoring old AM gear as much or more then getting on the air.  I really don't get much bang out of using my Yamamatics on CW, SSB, or AM.  I do use them, but there is nothing like using a tube rig glowing in the dark with all the transformers humming and relays clanking.  Like you,  I don't really care what the other guy is using as long as his signal is clean.  Bye the way,  I love the sound of your Globe King 500!

Lee, w0vt

----- Original Message -----
From: "Jim Wilhite" <w5jo at brightok.net>
To: "rbethman" <rbethman at comcast.net>, "AM Radio List" <amradio at mailman.qth.net>
Sent: Friday, August 1, 2014 9:23:34 PM
Subject: Re: [AMRadio] Getting back on AM

Operating AM is as more about fraternity than equipment.  I enjoy operating 
my GK 500 but have used modern equipment with an amplifier.  No one really 
cares what equipment you use, only the content of your conversation.  At 
least that is my feeling.

I hope to run across you on the air soon Bob.

Jim
W5JO

From rbethman at comcast.net  Sat Aug  2 02:35:21 2014
From: rbethman at comcast.net (rbethman)
Date: Sat, 02 Aug 2014 02:35:21 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <B1697F26DF2C4720B043E4249CCCCE55@JimPC>
References: <53DBD955.3050502@comcast.net>
	<B1697F26DF2C4720B043E4249CCCCE55@JimPC>
Message-ID: <53DC86A9.7050305@comcast.net>

I couldn't agree more!

I find the majority of AM operators are an entirely different breed of 
individuals.

Yes, there are "some" exceptions, but exceptions are found in everything 
people are involved in.

I indeed managed some 40mtr QSOs with a bunch of static, and weird band 
fluctuations.

I had a little bit of rain, but nothing like the heavy storms South of me.

I'm trying to better understand all the gizmos and seemingly endless 
number of buttons!  I pressed one, and the the VFO took off on 
scanning.  Need to slap that finger!  Also paint THAT button some wild 
color!

Trying to recover from pressing the wrong button is frustrating to this 
old dog!  I am a honest to goodness computer nut that did it for years 
as a SYSADMIN and many other positions.

Learning this is probably going to make me crazier than what I already 
am!  That is saying some.

The nut that I am, I ran another run of RG-213, and added a 40 meter 
Double Bazooka in the dark, and slight drizzle.  (Told you I am a nut case!)

I reached into Illinois, South of Chicago.  Not bad at all.  Then Radio 
something Middle East lit up and blew away the entire 7.2+Mc.  Wish 
they'd target THAT operation with a Drone!

I'll be listening for any familiar names, and calls.

Meantime, I'm having one of those nights when sleep isn't going to 
happen.  Oh well.

Bob - N0DGN


On 8/1/2014 10:23 PM, Jim Wilhite wrote:
> Operating AM is as more about fraternity than equipment.  I enjoy 
> operating my GK 500 but have used modern equipment with an amplifier.  
> No one really cares what equipment you use, only the content of your 
> conversation.  At least that is my feeling.
>
> I hope to run across you on the air soon Bob.
>
> Jim
> W5JO


From ranchorobbo at gmail.com  Sat Aug  2 07:35:27 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Sat, 2 Aug 2014 06:35:27 -0500
Subject: [AMRadio] Getting back on AM
In-Reply-To: <53DC86A9.7050305@comcast.net>
References: <53DBD955.3050502@comcast.net>
	<B1697F26DF2C4720B043E4249CCCCE55@JimPC>
	<53DC86A9.7050305@comcast.net>
Message-ID: <CALWD7Z6RX-D6A21EwvSyjzPRc+U23DP5+xJXYDeHRXF9Eim25g@mail.gmail.com>

I will or course work someone operating a plastic radio on AM--I
currently operate a plastic radio on AM after all--but if they are new
to AM, I will inform them that no, they are not "done with AM" as
certain a know-it-all on eHam will say (every chance he gets) but
rather, there is much much more than the plastic radio/leenyar
paradigm, and anyone who tells them they can sit back now and just
operate is in my opinion, doing them and AM, an injustice.
I will encourage them to:

Start collecting old radio technical resources such as old handbooks,
magazines (QST, Radio News etc.), the Navpers Basic Electronics volume
1 book, radio books by Sterling, LaPorte, and Terman, and of course a
subscription to ER and more important, the back issues...in other
words begin assembling and using a technical library that is fully AM
oriented,

Modify his equipment to better handle the AM duty cycle, and start
using an oscilloscope to monitor his transmit signal,

Begin assembling the tools and constructing a metal workshop and
test/repair bench,

Begin looking for and acquiring test equipment,

Work on making antenna improvements like Bob plans to do,

And of course, start looking for vintage gear  to fix, restore and
return to operating condition.

Why all this--because as you all surely know but may have forgotten
since many of you did all of this years ago, any true AM operator who
neglects this aspect of vintage radio (yes all of this applies to CW
as well as AM) is missing out of over 50% of what it means to be an AM
operator.  It is immensely satisfying to bring a piece of vintage gear
into operation, and better yet, punch a chassis and homebrew
something, even if it is only a power supply.

No one, at least not me, is stating that they have to get into vacuum
tube gear--the above can be accomplished with solid state equipment,
IF they know what they are doing with it, however most hams seem to
gravitate to tube gear because frankly, it is easier to figure out,
and (subjectivity here) more fun to use.
One sign that a new AM op is advancing is the shedding of his
"technological bigotry," the idea that radio communication is
essentially impossible without the latest fad boxes being shown
indoors at Dayton.   They are amazed that gear 60, 70 years old works
perfectly well for having an AM ragchew QSO.  It is quite a
revelation.

I mentioned CW above.  Sadly, CW is in the grip of this technology
bigotry for few CW ops bother to operate vintage gear, and CW is a
mode that even more than AM, is the original vintage mode.   What
happened?  What happened is what is now festering in the AM community,
the idea that pushing a mode button on a plastic radio is enough, and
the old ways can be left behind.  We now have CW ops who don't know
how to run a separate transmitter and receiver, don't know how to
achieve QSK without a plastic radio, and have no idea how to tune a
class C final.  They think homebrewing is making a balun and
restoration is getting an old bug cleaned up and polished.  Instead of
doing real radio they pass their time arguing on line about which
plastic fad box is better, sounding like a bunch of appliance
consumers in an audio forum.  And I'm speaking of hams who have been
licensed for 20+ years, not noobs.  It is exceedingly sad to see what
has become of the CW community.  Is this what we want for AM?  I
surely hope not.

This is why I will go to my grave exhorting AM operators to not let
the old ways be forgotten--we are actually the last pool of knowledge
for the old CW marine radiotelegraph ops are aging with no one to pass
their knowledge on to, and the same is true for the broadcast
professionals as those two fields are driven by economic factors.  As
a hobby, we are not so we are obliged to keep the old knowledge alive.
Sure radio will probably be entirely gone in 50 to 100 years but I see
no reason why the practice of maintaining and running vintage gear
can't be continued.  After all, the old gear is dong fine after 70
some odd years and there's no reason why it won't be doing fine years
from now when today's highly expensive plastic fad radios are in
landfills.

73

Rob
K5UJ

From rbethman at comcast.net  Sat Aug  2 08:36:39 2014
From: rbethman at comcast.net (rbethman)
Date: Sat, 02 Aug 2014 08:36:39 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <CALWD7Z6RX-D6A21EwvSyjzPRc+U23DP5+xJXYDeHRXF9Eim25g@mail.gmail.com>
References: <53DBD955.3050502@comcast.net>	<B1697F26DF2C4720B043E4249CCCCE55@JimPC>	<53DC86A9.7050305@comcast.net>
	<CALWD7Z6RX-D6A21EwvSyjzPRc+U23DP5+xJXYDeHRXF9Eim25g@mail.gmail.com>
Message-ID: <53DCDB57.4070403@comcast.net>

Rob and crew,

Yes, I am back on.  Did a bit of roundtable on 40mtrs just last night.

Am I finished burning rosin?  Oh heck no!

It just won't be any monsters like the one I'm trying to get out of here.

I've still got an SP-600, and a poor R-390A that needs a fair bit more 
TLC before it is ready for listening with.

I don't see a Valiant or such in the distance.

I'm such a nut case that I strung up the 40mtr Double Bazooka in the 
dark.  Don't ask!  I got one of those wild hairs!

I still see too many things to work on.  I have to get my straight key 
back into play.  That will take me more time copying CW since I haven't 
done so in a long time.

Had to do it for my General in '80, and I'm not letting it go the way of 
some species of animals that no longer exist.

I'll be on this weekend, I hope.

It will depend on how my body rides through this bloody weather.  Rain 
hits and arthritis flares up worse than sodium on water.

Bob - N0DGN

From wa4jk at hughes.net  Sat Aug  2 08:44:33 2014
From: wa4jk at hughes.net (Jerry)
Date: Sat, 2 Aug 2014 07:44:33 -0500
Subject: [AMRadio] AMRadio Digest, Vol 127, Issue 3
In-Reply-To: <mailman.2413.1406946224.11568.amradio@mailman.qth.net>
References: <mailman.2413.1406946224.11568.amradio@mailman.qth.net>
Message-ID: <2DA95472313F4132A9224B50E5AFEEC8@DonnaPC>

Read a lot and I don't comment much...but I'm almost done with the new 20X20 
shack... as Jim knows I once had some big iron and I'm going to put on tall 
ship back together. Bob your right on when to make a decision on enough is 
enough. I too did my duty for our country and things are showing up later in 
life from jumping out of perfectly flying aircraft or repelling off cliffs. 
But I digress. If it weren't for distance the T-213 would fit my needs. I 
have heard many T-2000 with amps and they will sound great with a little 
attention on the settings and the mic input.
----- Original Message ----- 
From: <amradio-request at mailman.qth.net>
To: <amradio at mailman.qth.net>
Sent: Friday, August 01, 2014 9:23 PM
Subject: AMRadio Digest, Vol 127, Issue 3


> Send AMRadio mailing list submissions to
> amradio at mailman.qth.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mailman.qth.net/mailman/listinfo/amradio
> or, via email, send a message with subject or body 'help' to
> amradio-request at mailman.qth.net
>
> You can reach the person managing the list at
> amradio-owner at mailman.qth.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of AMRadio digest..."
>
>
> Today's Topics:
>
>   1. Re: Getting back on AM (rbethman)
>   2. Re: Getting back on AM (rbethman)
>   3. Re: Getting back on AM (Rob Atkinson)
>   4. Re: Getting back on AM (manualman at juno.com)
>   5. Re: Getting back on AM (rbethman)
>   6. Re: Getting back on AM (Jim Wilhite)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 01 Aug 2014 18:26:23 -0400
> From: rbethman <rbethman at comcast.net>
> To: "amradio at mailman.qth.net" <amradio at mailman.qth.net>
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID: <53DC140F.6050501 at comcast.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Mel,
>
> You weren't the one that commented that folks would try to get me to
> restore an antique!
>
> My issue is that the specific antique I'm try to get someone to decide
> they want, is simply way to heavy, even when sitting on a moving man
> dolly.  The arthritis in the entire spine has just gotten to where I
> just can't drag that across the carpet any longer.
>
> I could go plug it all together and have a ball being one of the "Tall
> Ships".  The mind is really willing, but the body then demands too many
> pain killers.  Even though I'm only 64, I paid my body dues with 20+
> years Military service, doing those things that the young always do, yet
> never grasp the results until way too late!
>
> I have the room.  It is 27ft X 24 ft.  We simply have to take the hand
> that gets dealt in life.
>
> Bob - N0DGN
>
>
> On 8/1/2014 5:56 PM, Mel Farrer wrote:
>> Sorry Bob,
>>
>> Just wanted to make it clear,. at least for me, AM is AM if it sounds
>> good.  I still have room in my wine cellar for my Heavy Metal.  To
>> each his own,  Cheers,
>> Mel, K6KBE
>>
>>
>> On Friday, August 1, 2014 2:48 PM, rbethman <rbethman at comcast.net> wrote:
>>
>>
>> I'd say that there is definitely a lack of understanding.
>>
>> I'm doing what I can to get RID of a huge antique!  That would be my
>> T-213.
>>
>> It has a 400W carrier, and modulates far beyond what is legal unless I
>> choke the mike gain.
>>
>> Bob - N0DGN
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 01 Aug 2014 18:31:38 -0400
> From: rbethman <rbethman at comcast.net>
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID: <53DC154A.2060607 at comcast.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Pete,
>
> That antique is ready to connect all back up and let her rip!
>
> The issue is trying to move the beast even on the moving man dolly!
>
> 400lbs on a carpet, the entire spine loaded with arthritis, the mind is
> willing and able!  The body has issues!
>
> As to sticking my nose inside and melting the solder, I still do so
> quite willingly!
>
> Just spent time last year getting an HRO-50 recapped and running last 
> year.
>
> Bob - N0DGN
>
>
> On 8/1/2014 5:58 PM, manualman at juno.com wrote:
>> If anyone tries to entice you to restore some "antique" to get real "AM",
>> you can always tell them to get a life. I find it's a lot more fun to
>> play on the radio, then to be sticking my nose and soldering iron, for
>> endless amounts of time into some old rig, trying to bring it back to
>> life. Been there and done that. No reason to repeat my history lesson.
>>
>> Pete, wa2cwa
>>
>> On Fri, 01 Aug 2014 17:48:45 -0400 rbethman <rbethman at comcast.net>
>> writes:
>>> I'd say that there is definitely a lack of understanding.
>>>
>>> I'm doing what I can to get RID of a huge antique!  That would be my
>>> T-213.
>>>
>>> It has a 400W carrier, and modulates far beyond what is legal unless
>>> I
>>> choke the mike gain.
>>>
>>> Bob - N0DGN
>
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 1 Aug 2014 18:28:41 -0500
> From: Rob Atkinson <ranchorobbo at gmail.com>
> To: manualman <manualman at juno.com>
> Cc: Discussion of AM Radio in the Amateur Service
> <amradio at mailman.qth.net>
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID:
> <CALWD7Z4M-oJwzRsvFZS_BO3gQ50QvNVDBEpV_fOGdM46iEAOhA at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On Fri, Aug 1, 2014 at 4:58 PM,  <manualman at juno.com> wrote:
>> If anyone tries to entice you to restore some "antique" to get real "AM",
>> you can always tell them to get a life.
>
> Bob doesn't have to do that.  He has a legitimate and acceptable excuse.
>
> 73
> Rob
> K5UJ
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 1 Aug 2014 20:22:43 -0400
> From: <manualman at juno.com>
> To: rbethman at comcast.net
> Cc: amradio at mailman.qth.net
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID: <AABK72M5RASUC5S2 at smtpout03.vgs.untd.com>
> Content-Type: text/plain; charset=us-ascii
>
> Yep, I understand the reasons for selling off the T-213. I'm also giving
> consideration to selling off my Johnson Thunderbolt and few other 100+
> pound rigs that I can hardly lift or push, plus most of them are just
> dust catchers these days. I still think you'll have a lot of fun with the
> TS-2000 on AM, CW, SSB, and some digital modes if you desire. The rig is
> very versatile.
>
> Pete, wa2cwa
>
> On Fri, 01 Aug 2014 18:31:38 -0400 rbethman <rbethman at comcast.net>
> writes:
>> Pete,
>>
>> That antique is ready to connect all back up and let her rip!
>>
>> The issue is trying to move the beast even on the moving man dolly!
>>
>> 400lbs on a carpet, the entire spine loaded with arthritis, the mind
>> is
>> willing and able!  The body has issues!
>>
>> As to sticking my nose inside and melting the solder, I still do so
>>
>> quite willingly!
>>
>> Just spent time last year getting an HRO-50 recapped and running
>> last year.
>>
>> Bob - N0DGN
>>
>>
>> On 8/1/2014 5:58 PM, manualman at juno.com wrote:
>> > If anyone tries to entice you to restore some "antique" to get
>> real "AM",
>> > you can always tell them to get a life. I find it's a lot more fun
>> to
>> > play on the radio, then to be sticking my nose and soldering iron,
>> for
>> > endless amounts of time into some old rig, trying to bring it back
>> to
>> > life. Been there and done that. No reason to repeat my history
>> lesson.
>> >
>> > Pete, wa2cwa
>> >
>> > On Fri, 01 Aug 2014 17:48:45 -0400 rbethman
>> <rbethman at comcast.net>
>> > writes:
>> >> I'd say that there is definitely a lack of understanding.
>> >>
>> >> I'm doing what I can to get RID of a huge antique!  That would be
>> my
>> >> T-213.
>> >>
>> >> It has a 400W carrier, and modulates far beyond what is legal
>> unless
>> >> I
>> >> choke the mike gain.
>> >>
>> >> Bob - N0DGN
>
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 01 Aug 2014 20:28:43 -0400
> From: rbethman <rbethman at comcast.net>
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID: <53DC30BB.4060308 at comcast.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Rob,
>
> You certainly have that correct!
>
> I've restored antiques for a long time.
>
> Dumping a 400W carrier only means that I'll end up taking Vicodin or
> some such to get through the stupid arthrotis from dragging the 400lb
> monster back to the operating position.
>
> That critter would put me back into the Tall Ship category real fast!
>
> I've simply gotten very tired of the pain levels I deal with.
>
> I will continue to restore antiques, just not anything over maybe 85lbs.
>
> Then I'd only groan some.
>
> I guess folks didn't read my heavy metal sale post.
>
> Such is life!
>
> Bob - N0DGN
>
>
>
> On 8/1/2014 7:28 PM, Rob Atkinson wrote:
>> On Fri, Aug 1, 2014 at 4:58 PM,  <manualman at juno.com> wrote:
>>> If anyone tries to entice you to restore some "antique" to get real 
>>> "AM",
>>> you can always tell them to get a life.
>> Bob doesn't have to do that.  He has a legitimate and acceptable excuse.
>>
>> 73
>> Rob
>> K5UJ
>
>
>
> ------------------------------
>
> Message: 6
> Date: Fri, 1 Aug 2014 21:23:34 -0500
> From: "Jim Wilhite" <w5jo at brightok.net>
> To: "rbethman" <rbethman at comcast.net>, "AM Radio List"
> <amradio at mailman.qth.net>
> Subject: Re: [AMRadio] Getting back on AM
> Message-ID: <B1697F26DF2C4720B043E4249CCCCE55 at JimPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> Operating AM is as more about fraternity than equipment.  I enjoy 
> operating
> my GK 500 but have used modern equipment with an amplifier.  No one really
> cares what equipment you use, only the content of your conversation.  At
> least that is my feeling.
>
> I hope to run across you on the air soon Bob.
>
> Jim
> W5JO
>
> -----Original Message----- 
>
>
> Well,
>
> I know to many, that this is heresy.  However, I acquired a Kenwood
> TS-2000 just completely re-manufactured by Kenwood.
>
> It will do 25W on AM.  It will do this from 160m through 6m.
>
> I will follow it with an Amp Supply LK-500ZB.  I already am more than
> aware of the issues of AM with SS in lieu of tubes!
>
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
>
>
> ------------------------------
>
> End of AMRadio Digest, Vol 127, Issue 3
> ***************************************
> 



From danyoder.cs at gmail.com  Sat Aug  2 09:39:13 2014
From: danyoder.cs at gmail.com (Daniel Yoder)
Date: Sat, 2 Aug 2014 09:39:13 -0400
Subject: [AMRadio] Getting back on AM
In-Reply-To: <53DCDB57.4070403@comcast.net>
References: <53DBD955.3050502@comcast.net>
	<B1697F26DF2C4720B043E4249CCCCE55@JimPC>
	<53DC86A9.7050305@comcast.net>
	<CALWD7Z6RX-D6A21EwvSyjzPRc+U23DP5+xJXYDeHRXF9Eim25g@mail.gmail.com>
	<53DCDB57.4070403@comcast.net>
Message-ID: <CAKmXKb5srTD599Hahta0w88LMwukSvYyXR7G4A93RWRC9qM3rA@mail.gmail.com>

Amen Rob, Viva AM and anything with a tube in it. I would like to say that
I have found some pretty knowledgeable tube dudes on audio and guitar
forums. They too are helping keep the tube world glowing.
Dan W3DKY

On Sat, Aug 2, 2014 at 8:36 AM, rbethman <rbethman at comcast.net> wrote:

> Rob and crew,
>
> Yes, I am back on.  Did a bit of roundtable on 40mtrs just last night.
>
> Am I finished burning rosin?  Oh heck no!
>
> It just won't be any monsters like the one I'm trying to get out of here.
>
> I've still got an SP-600, and a poor R-390A that needs a fair bit more TLC
> before it is ready for listening with.
>
> I don't see a Valiant or such in the distance.
>
> I'm such a nut case that I strung up the 40mtr Double Bazooka in the dark.
>  Don't ask!  I got one of those wild hairs!
>
> I still see too many things to work on.  I have to get my straight key
> back into play.  That will take me more time copying CW since I haven't
> done so in a long time.
>
> Had to do it for my General in '80, and I'm not letting it go the way of
> some species of animals that no longer exist.
>
> I'll be on this weekend, I hope.
>
> It will depend on how my body rides through this bloody weather.  Rain
> hits and arthritis flares up worse than sodium on water.
>
> Bob - N0DGN
>
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From k4kyv at charter.net  Sun Aug  3 15:02:12 2014
From: k4kyv at charter.net (Donald Chester)
Date: Sun, 3 Aug 2014 14:02:12 -0500
Subject: [AMRadio] AMRadio Digest, Vol 127, Issue 4
In-Reply-To: <mailman.2452.1406983004.11568.amradio@mailman.qth.net>
References: <mailman.2452.1406983004.11568.amradio@mailman.qth.net>
Message-ID: <001c01cfaf4d$6ed502f0$4c7f08d0$@charter.net>

Yes, I am aware of a certain "AM is just another mode" element within the AM
community.  However, except for casual operators who primarily operate other
modes but like to occasionally push the AM button on their transceiver, I
think most of the active hard-core AMers  agree that there is something
exceptional about AM that draws us to it, beyond just another button to push
or mode switch setting to select.

You hit on one reason why I find myself working less and less CW lately.
Very rarely do you run into a homebrew rig anymore, and few are interested
in conversing about anything radio-related of a technical nature.
Increasingly, just exchange names, QTH and signal reports (often bogus 599s
after asking for multiple repeats ), followed by brand name and model number
of the radio (as if I could be expected to keep track of  them all), and
then the inevitable  TKS FER QSO OM CUL 73 QRZ? I find myself averaging
about ten QSOs of that variety for every real conversation that actually
interests me, radio or non-radio related. No doubt a computer is used  to
receive and send much of to-day's CW , by ops incapable of copying by ear. I
am told CW readers don't fare so well with code sent with a mechanical bug
or hand key; maybe that's the reason for fewer OTA ragchews.

Now don't get me wrong; I always welcome a newcomer to AM and  do what I can
help him get his radio set up to sound good and get the modulation right,
but it makes me less prone to operate outside the AM Ghetto (oops... I mean
WINDOW), when I call CQ and 90% of the replies are by someone trying out AM
for the very first time out of curiosity after hearing my CQ. I make it a
point to be friendly, helpful and never condescending; occasionally one of
these ops will like what he hears and decide to hang out on AM regularly,
maybe even ending up building his own rig or resurrecting a piece of vintage
equipment.  Some top-shelf AM signals are generated with transceiver +
leen-yar, when the AM mode isn't such an afterthought that a quality signal
can't be generated no matter what. YMMV. But I hope amateur AM doesn't end
up going the way CW has in recent years, and it's nice to occasionally
converse with a veteran AMer outside the popular window frequencies.

You may be right about radio in another 50 or 100 years. I don't hear that
many younger hams on HF regardless of mode. The last great surge of
newcomers in their teens and twenties came on the scene in the late 60s and
early 70s, making up many of the well-known Tall Ships, who are now in their
early sixties. The generations to follow are rather sparse. The AM community
(members of all ages) makes up one of the few remaining vestiges of genuine
amateur radio to be heard on the bands to-day.

Don k4kyv



-----Original Message-----

From: Rob Atkinson <ranchorobbo at gmail.com>
I will or course work someone operating a plastic radio on AM--I currently
operate a plastic radio on AM after all--but if they are new to AM, I will
inform them that no, they are not "done with AM" as certain a know-it-all on
eHam will say (every chance he gets) but rather, there is much much more
than the plastic radio/leenyar paradigm, and anyone who tells them they can
sit back now and just operate is in my opinion, doing them and AM, an
injustice...


I mentioned CW above.  Sadly, CW is in the grip of this technology bigotry
for few CW ops bother to operate vintage gear, and CW is a
mode that even more than AM, is the original vintage mode.   What
happened?  What happened is what is now festering in the AM community, the
idea that pushing a mode button on a plastic radio is enough, and the old
ways can be left behind.  We now have CW ops who don't know how to run a
separate transmitter and receiver, don't know how to achieve QSK without a
plastic radio, and have no idea how to tune a class C final.  They think
homebrewing is making a balun and restoration is getting an old bug cleaned
up and polished.  Instead of doing real radio they pass their time arguing
on line about which plastic fad box is better, sounding like a bunch of
appliance consumers in an audio forum.  And I'm speaking of hams who have
been licensed for 20+ years, not noobs.  It is exceedingly sad to see what
has become of the CW community.  Is this what we want for AM?  I surely hope
not.

This is why I will go to my grave exhorting AM operators to not let the old
ways be forgotten--we are actually the last pool of knowledge for the old CW
marine radiotelegraph ops are aging with no one to pass their knowledge on
to, and the same is true for the broadcast professionals as those two fields
are driven by economic factors.  As a hobby, we are not so we are obliged to
keep the old knowledge alive.
Sure radio will probably be entirely gone in 50 to 100 years but I see no
reason why the practice of maintaining and running vintage gear can't be
continued.  After all, the old gear is dong fine after 70 some odd years and
there's no reason why it won't be doing fine years from now when today's
highly expensive plastic fad radios are in landfills.

73

Rob
K5UJ



---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com


From k4kyv at charter.net  Tue Aug  5 11:30:13 2014
From: k4kyv at charter.net (Donald Chester)
Date: Tue, 5 Aug 2014 10:30:13 -0500
Subject: [AMRadio] Fatal Accident at W0ZUS
Message-ID: <001901cfb0c2$2710a520$7531ef60$@charter.net>

Readers may remember the auction a couple of years ago at the estate of
Dewey, W0ZUS, in which loads of parts and equipment, including numerous
kilowatt size homebrew and converted broadcast transmitters went for pennies
on the dollar, largely because of the remote  location near Rapid City SD,
too far away for most of us to attend.

Gary Peterson, K0CX, reports that a person was killed in a tower accident at
Dewey's QTH. He was taking down Dewey's 120 ft. 160m vertical when it went
over with him and another fellow belted on. He was an experienced climber
who had done tower work for his employer for many years. Apparently, he
overestimated the strength of the powerline-type base insulators; the
remaining 30 ft. of tower went over when the last set of guys was removed.

This makes Dewey's passing a double tragedy. I can't imagine how Dewey's
widow must feel, nor the lawsuits his estate is likely to face.

Not to speak ill of the dead,  but there was no excuse for that accident.
Sounds like Dewey had three insulators, one in each leg of the tower near
the base. Personally, I would never use that type of base insulator,
although this is a common method hams use to put up a tower for a vertical.
A single insulator on a pivoting base, like the ones used in broadcast
service, is much to be preferred. Rohn used to sell three-legged insulators
for the 25G and 45G, but they were very specific in NOT recommending this
type of insulator for an AM type vertical. But  regardless, I can't conceive
of an experienced tower worker removing the last set of guys while belted to
a tower like that, without first securing temporary guys immediately under
each of the last sections before that section was removed. Of course, with a
single pivoting type base insulator, temporary guys is a given, because
otherwise there would be nothing to hold the tower up until the rest could
be dismantled, and this kind of accident would have never happened. Without
guys, a 3-legged insulator configuration wouldn't have much more holding
strength than a standard pivoting type insulator to keep the tower vertical.

This person may have been an experienced CLIMBER, but I suspect he had zero
experience erecting and dismantling towers. 

This proves another point, that there is little reason to be fearful of
climbing a tall tower, 100 ft. or more, as long as one is physically fit,
equipped with proper safety gear, and the tower structure is secure. You're
just as dead after falling 30 feet as from 150 feet. Just because you are
only climbing 20 or 30 ft. up on a tower is no reason not to take the same
safety precautions as you would climbing all the way to the top.

Don k4kyv




---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com


From k4kyv at charter.net  Tue Aug  5 15:51:12 2014
From: k4kyv at charter.net (Donald Chester)
Date: Tue, 5 Aug 2014 14:51:12 -0500
Subject: [AMRadio] Another lightning storm map
Message-ID: <000001cfb0e6$9c274660$d475d320$@charter.net>

For years I have used Vaisala. It can be very helpful in deciding whether or
not it is worthwhile to fire up the rig, particularly on 160, 80 or 40 on a
summer night.
http://thunderstorm.vaisala.com/explorer.html 

Here's another one that not only displays a map, but sends out a click in
real time for every strike. And you get the choices of N. America, Europe or
Oceania (VK and ZL).

http://www.lightningmaps.org/realtime?lang=en 

Another view:

http://www.blitzortung.org/Webpages/index.php?lang=en&page_0=30 


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com


From deswynar at xplornet.ca  Fri Aug  8 08:19:13 2014
From: deswynar at xplornet.ca (Eddy Swynar)
Date: Fri, 8 Aug 2014 08:19:13 -0400
Subject: [AMRadio] Good Leads Wanted!
Message-ID: <2E33A049-23A1-46C5-938C-BD95BC5AE44D@xplornet.ca>

Good Day All,

I have a friend who is just on the verge of seriously tackling a serious vacuum tube regenerative receiver project, but is presently looking for any & all good literature surrounding the genre...

To that end, he has accumulated vintage West Coast & ARRL Handbooks, & various QST articles---but I recommended that first & foremost, he should get his hands on a copy of the book, "SECRETS OF HOMEBUILT REGENERATIVE RECEIVERS" by C.F. Rockey. Unfortunately, the publisher of this book---Lindsay Publications---is no more.

Does anyone out there reading this have a copy that they wouldn't ming parting with...? That, or is anyone aware if this very fine publication might be available somewhere on-liine, for free downloading...?

Any & all leads are appreciated---thank-you!

~73~  de Eddy VE3CUI - VE3XZ

From bsugarberg at core.com  Fri Aug  8 10:54:23 2014
From: bsugarberg at core.com (bsugarberg at core.com)
Date: Fri, 8 Aug 2014 10:54:23 -0400 (EDT)
Subject: [AMRadio] (no subject)
Message-ID: <49794.76.244.144.149.1407509663.squirrel@webmail.core.com>



Hello Eddy,

Here is the cheapest copy I could find:

<http://www.abebooks.com/servlet/BookDetailsPL?bi=13467732544>

73, Bruce WA8TNC

From rbethman at comcast.net  Mon Aug 11 15:31:08 2014
From: rbethman at comcast.net (rbethman)
Date: Mon, 11 Aug 2014 15:31:08 -0400
Subject: [AMRadio] Kenwood TS-2000
Message-ID: <53E919FC.4050409@comcast.net>

Folks,

This is one heck of a fine radio!

I've been having a ball with it!

I've even gone on AM, fed it into my LK0500ZB.

Went on 40mtrs.  Had a riot!  I got to South of Chicago.

The static crashes were out of the world.  Yep, I indeed had the PRE on. 
  I wanted to HEAR!

The built-in brain filter works just fine!

I got it properly adjusted for AM use.  Anytime folks want to go AM with 
even the TS-930SAT, or this one, you really have to dial in the carrier 
vs. audio gain.  If you don't, it will sound crappy.

These little wonders are fun to play with, and I for one have been 
enjoying it immensely!

Bob - N0DGN

From rbethman at comcast.net  Wed Aug 13 19:59:25 2014
From: rbethman at comcast.net (rbethman)
Date: Wed, 13 Aug 2014 19:59:25 -0400
Subject: [AMRadio] BIG PRICE REDUCTION Heavy Metal Sale meet both trades and
	it is FREE!
Message-ID: <53EBFBDD.4010206@comcast.net>

BIG PRICE REDUCTION

NO BS!  Price is NOW $600 cash at the door for the first to ARRIVE!

I am open to the idea of "some" trading.

A clean R-390A that is fully functional will drop the asking by $300

I would also apply the same to a clean and fully functional SP-600.

If you bring an SP-600 and an R-390A, both clean and fully functional, 
the YOU get the T-213 package for FREE!


1 T-213, (S/N 65 - B&W) BC-614 speech amp, BC-939 Antenna Tuner.

Tuning units from 2MC through 18MC.

All PA Coils to go with the TUs. (almost two sets.)

Full complement of tubes, number of spares to include 2A3s, 3B28s,
250TH, several 100THs.

1) The T-213 went through Depot in '59.  Lon Cottingham and Robert Downs 
rescued it still in the crate.  It had been destined for disposal at sea.

2) It comes with all original issue cables.

One additional piece goes with this package, and it is one JB-70 that 
needs a top plate made for it, and requires rewiring just inside, as 
where it came from had an issue with rodents that decided that 
insulation was delicious!

Is sitting on a "moving man dolly", goes with.  Have hand truck that 
handles 700lbs., straps that handle 450lbs.  Bring healthy friend!  This 
weighs at least 400lbs.


NO SHIPPING! Must pickup!

Carrier - 400W - Peak Out - Will exceed legal Input PEP!  Must Be 
throttled by audio gain!

Based on Bird Peak reading Watt meter.


From rbethman at comcast.net  Wed Aug 13 22:01:00 2014
From: rbethman at comcast.net (rbethman)
Date: Wed, 13 Aug 2014 22:01:00 -0400
Subject: [AMRadio] BIG PRICE REDUCTION - links to pics
Message-ID: <53EC185C.5080507@comcast.net>

Folks:

They aren't cleaned up, they *are* out of focus - I haven't got any 
method to take pictures that won't "shake" as I try and hold it!

http://home.comcast.net/~rbethman/1.jpg
http://home.comcast.net/~rbethman/2.jpg
http://home.comcast.net/~rbethman/3.jpg
http://home.comcast.net/~rbethman/4.jpg
http://home.comcast.net/~rbethman/5.jpg
http://home.comcast.net/~rbethman/6.jpg
http://home.comcast.net/~rbethman/7.jpg
http://home.comcast.net/~rbethman/8.jpg

These items need to be cleaned!   Been here since 2003!  Haven't been 
used since around 2006?

Can't remember.

The tuner has tape residue on it.  Goo off should remove it without 
damaging the paint.  No, I haven't tried.  Personally I could care less! 
  It only has to work!

I don't spit and polish anything!

The stuff on top of the TX is junk!  Will come off when someone gets here!

Bob - N0DGN



From rbethman at comcast.net  Sun Aug 17 12:13:29 2014
From: rbethman at comcast.net (rbethman)
Date: Sun, 17 Aug 2014 12:13:29 -0400
Subject: [AMRadio] SOLD - Heavy Metal
Message-ID: <53F0D4A9.2050609@comcast.net>

I indeed have a buyer.

ALL items on my heavy metal sale *are* spoken for!

Bob - N0DGN

From w4wsz at embarqmail.com  Sun Aug 17 19:46:26 2014
From: w4wsz at embarqmail.com (Bob)
Date: Sun, 17 Aug 2014 19:46:26 -0400
Subject: [AMRadio] Kenwood TS-930
Message-ID: <002101cfba75$75f675e0$61e361a0$@embarqmail.com>

I have a set of fold outs including the large fold out of the schematic.

 

If anyone needs these, drop me an e-mail.

 

73,

Bob,W4WSZ

w4wsz at embarqmail.com

 


From w4wsz at embarqmail.com  Mon Aug 18 07:13:28 2014
From: w4wsz at embarqmail.com (Bob)
Date: Mon, 18 Aug 2014 07:13:28 -0400
Subject: [AMRadio] Foldouts Spoken For
Message-ID: <001301cfbad5$700945d0$501bd170$@embarqmail.com>

The TS-930 foldouts are no longer available

 

Bob


From pete at zilliox.net  Tue Aug 19 11:12:52 2014
From: pete at zilliox.net (pete zilliox)
Date: Tue, 19 Aug 2014 08:12:52 -0700
Subject: [AMRadio] Audio Limiter for AM HAM TX
Message-ID: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>

Forgive this query if it?s been discussed many times before....I've looked
on ebaY (yeah I know) for a cost effective simple inexpensive audio chain
limiter to use with my Symetrix 528E voice processor that drives my EF
Johnson Desk KW AM transmitter.  I want to protect the very old Johnson
high level modulation transformer from over modulation.  I'm totally over
whelmed with way too many options on ebaY.  I am only looking for a single
channel limiting function in a reasonably priced box.  I currently use a
Nady active (vacuum tube pre-amp) broadcast mic to the 528E followed by a
Dorrough  Loudness meter in parallel to a line going to the W2IHY 600ohm/Hi
Impedance variable level control feeding the Ranger exciter.
 Recommendations for such an inline limiter, anyone?  Thanks Pete ? K5PZ

From petef at sprynet.com  Tue Aug 19 11:54:42 2014
From: petef at sprynet.com (Pete Ferrand)
Date: Tue, 19 Aug 2014 11:54:42 -0400 (EDT)
Subject: [AMRadio] Audio Limiter for AM HAM TX
Message-ID: <10650332.1408463683813.JavaMail.root@elwamui-polski.atl.sa.earthlink.net>


Although I don't use a modulation transformer, limiting builds density and that's what I was after when I bought an Aphex Dominator II limiter tri band limiter. Does everything I expected and wanted it to do. 

Just about any of the digital processors with limiters such as the Alesis CLX-440 will also provide the brick wall limiting that you're looking for. 

-Pete
WB2QLL
Somers, WI


-----Original Message-----
>From: pete zilliox <pete at zilliox.net>
>Sent: Aug 19, 2014 11:12 AM
>To: AM Radio <AMRadio at mailman.qth.net>
>Subject: [AMRadio] Audio Limiter for AM HAM TX
>
>Forgive this query if it?s been discussed many times before....I've looked
>on ebaY (yeah I know) for a cost effective simple inexpensive audio chain
>limiter to use with my Symetrix 528E voice processor that drives my EF
>Johnson Desk KW AM transmitter.  I want to protect the very old Johnson
>high level modulation transformer from over modulation. 

From ranchorobbo at gmail.com  Tue Aug 19 12:07:01 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Tue, 19 Aug 2014 11:07:01 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
Message-ID: <CALWD7Z4gDnZ_S9Vr6VLEMQwoeN2i+UXJtvt4sjzZZKF=-A6QBA@mail.gmail.com>

There are basically two kinds of limiters.  One is the studio limiter
that has a slower attack and is not an AM broadcast type limiter.  The
classic version of that is the old UREI 1176.  In the Orban blue panel
line, the 422.  So you need to be sure to get a limiter that is
specifically described as a broadcast limiter, i.e. a modulation
limiter if you want the fast aggressive limiting that doesn't let any
high peaks get by.  I have not had experience with all of the old
limiters out there but assuming you can't afford anything pricey like
an Optimod, then the CRL line of PMC boxes are good.  PMC 300, 400 and
450.  PMC stands for Peak Modulation Controller.   These used to be
relatively inexpensive but the prices seem to be creeping up.   The
Optimod is actually a multi-band compressor and limiter in one box.
Inovonics had or has a limiter, the model 222.  Less often seen are
the Dorrough DAP310, and Gregg Labs and Texar limiters and BL
Modulimiter.

But a word of caution:  Vintage ham AM rigs were not designed to
handle compressed limited audio.   The mod. iron in your Desk KW may
be better off with a mic into the rig and the op keeping an eye on the
carrier with an oscilloscope.   You may have to modify the rig before
you start driving it with heavily limited audio.

73

Rob
K5UJ

On Tue, Aug 19, 2014 at 10:12 AM, pete zilliox <pete at zilliox.net> wrote:
> Forgive this query if it's been discussed many times before....I've looked
> on ebaY (yeah I know) for a cost effective simple inexpensive audio chain
> limiter to use with my Symetrix 528E voice processor that drives my EF
> Johnson Desk KW AM transmitter.  I want to protect the very old Johnson
> high level modulation transformer from over modulation.  I'm totally over
> whelmed with way too many options on ebaY.  I am only looking for a single
> channel limiting function in a reasonably priced box.  I currently use a
> Nady active (vacuum tube pre-amp) broadcast mic to the 528E followed by a
> Dorrough  Loudness meter in parallel to a line going to the W2IHY 600ohm/Hi
> Impedance variable level control feeding the Ranger exciter.
>  Recommendations for such an inline limiter, anyone?  Thanks Pete - K5PZ
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From ranchorobbo at gmail.com  Tue Aug 19 12:17:16 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Tue, 19 Aug 2014 11:17:16 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <CALWD7Z4gDnZ_S9Vr6VLEMQwoeN2i+UXJtvt4sjzZZKF=-A6QBA@mail.gmail.com>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
	<CALWD7Z4gDnZ_S9Vr6VLEMQwoeN2i+UXJtvt4sjzZZKF=-A6QBA@mail.gmail.com>
Message-ID: <CALWD7Z7xtuph2njCE-w6LCGC9xYbbomw=4q6=bo2fc-MgXAi8Q@mail.gmail.com>

one additional comment--if you decide to get a mod. limiter, you need
one designed for radio broadcast because they will be built to operate
in a RF environment.  A consumer electronics grade product may lack
the shielding and by-pass caps etc. and experience audio distortion
from RF.

73

Rob
K5UJ

From nq5t at tx.rr.com  Tue Aug 19 13:39:23 2014
From: nq5t at tx.rr.com (GRANT YOUNGMAN)
Date: Tue, 19 Aug 2014 12:39:23 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
Message-ID: <47F3F1B2-945B-48B8-9ED9-DC18213850DC@tx.rr.com>

The current gold standard in the ham community appears to be the Inovonics 222.  The most advantageous thing about it is that the gyrator-based LPF can be modified to limit AM bandwidth to something under the NRSC limit for ham use (a bezillion resistors, but not too bad).

The CRL PMC-series limiters are also very effective.  Example would be the PMC-450.

Both of those boxes seem to go in the $400-450 range give or take, although you can probably find a CRL PMC box for less. 

I currently have a CRL SMP-950.  This is a stereo AM negative peak limiter that can be strapped for mono.  It has adjustable asymmetry like most, tilt correction, etc.  There?s a simple (one resistor) mod recommended to eliminate an issue with clipping distortion and open up the audio.  For some reason, these also don?t seem to be as expensive as some others.  I have outboard filtering (4-5 KHz) to keep the bandwidth in check.  Like the 222, the AGC can be set so that a slow AGC leveler isn?t really needed in front of it ? so you can drive it direct from the 528E.

The 222 can still be purchased new from BSW (maybe it?s NOS), at about double the used price.  I don?t know if the 222 is in current production or not.  The rest aren?t.

Even a CBS Volumax/Audimax would work ok ? just make sure the Volumax is an AM limiter and not an FM version.  I would recommend the use of the Audimax leveler with the Volumax.  eBay prices on these seem ridiculous to me, though, given their age.  I used to use a set of these on a Globe King, and they worked fine.

If you?re worried about pushing the mod transformer with asymmetrical limiter output on positive peaks, you can just punch in the phase rotator in the 528e to essentially eliminate the asymmetry.  That?s the way I have mine set up (driving a Globe Chump), figuring there?s no need to stress old iron for a few extra positive peaks.

Grant NQ5T


On Aug 19, 2014, at 10:12 AM, pete zilliox <pete at zilliox.net> wrote:

> Forgive this query if it?s been discussed many times before....I've looked
> on ebaY (yeah I know) for a cost effective simple inexpensive audio chain
> limiter to use with my Symetrix 528E voice processor that drives my EF
> Johnson Desk KW AM transmitter.  I want to protect the very old Johnson
> high level modulation transformer from over modulation.  I'm totally over
> whelmed with way too many options on ebaY.  I am only looking for a single
> channel limiting function in a reasonably priced box.  I currently use a
> Nady active (vacuum tube pre-amp) broadcast mic to the 528E followed by a
> Dorrough  Loudness meter in parallel to a line going to the W2IHY 600ohm/Hi
> Impedance variable level control feeding the Ranger exciter.
> Recommendations for such an inline limiter, anyone?  Thanks Pete ? K5PZ


From jayw5jay at cox.net  Tue Aug 19 16:36:55 2014
From: jayw5jay at cox.net (Jay Bromley)
Date: Tue, 19 Aug 2014 15:36:55 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <ghfW1o01E45oxQM01hfYod>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
	<ghfW1o01E45oxQM01hfYod>
Message-ID: <009b01cfbbed$51713290$f45397b0$@cox.net>

I have an Inovonics 222 and it has been a nice processor.  However I would
love to try a Orban 9100B if anyone has one laying around.  
:-)

73 de w5jay/jay..


From ranchorobbo at gmail.com  Tue Aug 19 17:48:59 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Tue, 19 Aug 2014 16:48:59 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <47F3F1B2-945B-48B8-9ED9-DC18213850DC@tx.rr.com>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>
	<47F3F1B2-945B-48B8-9ED9-DC18213850DC@tx.rr.com>
Message-ID: <CALWD7Z7_ytgjRo-4qMNqayBY-QTX6GhyWWiBXWC25zC=fkE1xw@mail.gmail.com>

On Tue, Aug 19, 2014 at 12:39 PM, GRANT YOUNGMAN <nq5t at tx.rr.com> wrote:
> The current gold standard in the ham community appears to be the Inovonics 222.  The most advantageous thing about it is that the gyrator-based LPF can be modified to limit AM bandwidth to something under the NRSC limit for ham use (a bezillion resistors, but not too bad).
>

I think Inovonics will sell a modification kit and instructions on how
to change the cutoff frequency.

> The CRL PMC-series limiters are also very effective.  Example would be the PMC-450.
>
> Both of those boxes seem to go in the $400-450 range give or take, although you can probably find a CRL PMC box for less.
>

It pays to look around.  I once got a PMC400 at a hamfest for $20.
It just needed some cleanup and a couple of weeks running it.   I also
found a PMC450 on ebay for $250.

> Even a CBS Volumax/Audimax would work ok -- just make sure the Volumax is an AM limiter and not an FM version.  I would recommend the use of the Audimax leveler with the Volumax.  eBay prices on these seem ridiculous to me, though, given their age.  I used to use a set of these on a Globe King, and they worked fine.
>

I forgot about the CBS Labs gear.  Thanks for mentioning it.   They
show up on ebay also.

The problem with setting up a low pass filter in a limiter like the
Inovonics 222 is that your bandwidth is fixed at whatever cutoff you
choose.  If you prefer to vary it with conditions and bands, then it
is better to have the limiter running wide open, and select a
different cutoff elsewhere.
There are passive filter designs.  I simply cascade a pair of
equalizers, each with 15 dB boost/cut to get enough high frequency
attenuation.

Jay, I think we'd all love to try a 9000 or 9100 : )

73
Rob
K5UJ

From jayw5jay at cox.net  Tue Aug 19 17:58:17 2014
From: jayw5jay at cox.net (Jay Bromley)
Date: Tue, 19 Aug 2014 16:58:17 -0500
Subject: [AMRadio] Audio Limiter for AM HAM TX
In-Reply-To: <glp41o01a45oxQM01lp6Xn>
References: <CAC39Vqp0_8UvnWaCCkDcbCAb0kHYkDRgmWGaAPUgy3BJW3MapA@mail.gmail.com>	<47F3F1B2-945B-48B8-9ED9-DC18213850DC@tx.rr.com>
	<glp41o01a45oxQM01lp6Xn>
Message-ID: <00c701cfbbf8$aed6a5e0$0c83f1a0$@cox.net>


Jay, I think we'd all love to try a 9000 or 9100 : )

73
Rob
K5UJ

Hi Rob,
Well they are out there.  My friend up north of here found one and it has
the LED replacements for the meter.  Wow what a show and boy does he sound
good!  Even if I pony up with the money, you don't see them much that are in
nice condition.

I was just trying to be sneaky here.  Thinking there might be one in a
garage not being used.  73 de jay/w5jay..


From amradio at mailman.qth.net  Thu Aug 21 20:55:22 2014
From: amradio at mailman.qth.net (k4deejim--- via AMRadio)
Date: Thu, 21 Aug 2014 20:55:22 -0400 (EDT)
Subject: [AMRadio] FS,HQ-140X w/Speaker
Message-ID: <8D18BBAE26BF82C-15A0-176DA@webmail-va010.sysops.aol.com>


For Sale, Hammoarlund HQ-140X receiver with matching speaker in original factory boxes.
Both units are in excellent working and cosmetic condition . They have been stored for over 50 years .
Calibration and audio quality are excellent as well.   $300 , prefer  not to ship.  Jim-K4DEE
  Located in Easley,SC  Tele; 864-655-9570

From kenw8ek at gmail.com  Fri Aug 22 13:07:54 2014
From: kenw8ek at gmail.com (Ken Simpson, W8EK)
Date: Fri, 22 Aug 2014 13:07:54 -0400
Subject: [AMRadio] Kenwood Items FS
Message-ID: <53F778EA.8040409@gmail.com>


Kenwood and related Items For Sale:

Dual Band FM Transceiver, Two meter muti-mode transceiver,
Dual Band HT, Microphones, Original Box, Coaxial Antenna
Switches, HT Accessories, Noise Filter, Original Manuals,
and more


Kenwood TM G-707 A Dual Band Transceiver:

The TM-G 707 has an extra-large control panel with the welcoming
glow of its amber-colored LCD. The TM-G 707 is extraordinarily
user-friendly, which is an important consideration for a mobile
rig. This mobile transceiver provides 50 (50/10/5W) watts on 2
meters and 35 (35/10/5W) watts on 440 MHz. The TM-G707A offers
features such as  memory name function (7 character), S-meter
squelch, time-out timer, tone encode/decode, dimmer, and auto
power-off. Non-simultaneous cross-band repeater access is
supported. A 6 pin mini DIN connector for 1200/9600 bps packet
and other digital modes is provided.

Receive coverage is 118-174 and 410-524 MHz F3E (FM).
Transmit range is 144-148 and 430-450 MHz F3E (FM).
Size is 5.5 x 1.7 x 7.4 inches. It requires 13.8 VDC at 11 amps.

Features include:
     180 Alpha Memories
     Big Display
     DTMF Hand Mic.
     Auto Repeater Offset
     Guide Function
     Dimmer
     Time Out Timer
     Visual Scan
     Priority Scan
     Auto Simplex Checker
     DTSS Selective Call
     PL Decode/Encode
     Packet 1200/9600 DIN plug
     Hi/Med/Lo RF Out

This particular unit is still in its original box.  It functions
100%, and looks the same.  As best I can tell, all of the little
packages of screws, fuses, etc. are included.  $250


Kenwood TS-711, multimode 2 meter transceiver:

This unit is an FM, SSB, and CW transceiver for 2 meters. It
has 40 memory channels, and up to 25 Watts of output power,
which is continuously variable (no Hi or Low switch, but a
front panel control to continuously vary power). Of course
it will scan, and do the things one expects in a 2 meter rig.
It has a GASFET in the front end for one of the best receivers
I have ever used. The 120 V AC power supply as well as 13 V DC,
is built in. The case looks very similar to a TS-440 or TS-450
HF rig.

This particular unit is very nice. I do not find any scratches,
but it does show slight use. It has the optional TU-5 subaudible
tone PL encoder in it, so it can be used with modern repeaters.
Power cord and mic are included, with paper work, for $425.


Kenwood TH-78 A Dual Band HT:

The Kenwood TH-78A is a sophisticated dual-band HT. It has
built in tone and paging functions, alphanumeric memory and
message paging. Additionally it has dual-frequency receive
capability (including VHF+VHF and UHF+UHF). There are 50
memory channels. The operator can choose from 8 different
scan types. DTSS allows DTMF access to the transceiver.

The receive range is 118-173.995 and 438-449.995 MHz.
It has three RF output levels of about 5.0/0.5/0.02 watts.

Features include:
    Two Line LCD Display
    50 Memories
    Alphanumeric Memory
    Message Paging
    Cross Band Operation
    Backlit Keypad
    Multi Scan Function

This one works fine, and looks fine. It includes the HT,
rubber duck antenna, wall charger, and paper work.
A PB-13 standard battery is included, that holds its charge
fine. Also included are two PB-17 heavy duty packs that are
in bad condition. $135


Kenwood MC-60 A Deluxe Desk Microphone:

The Kenwood MC-60A has been a popular desk mic among
Kenwood owners for many years. It has a communication
type dynamic unidirectional moving coil type mic element
and features UP-DOWN tuning (on compatible Kenwood
transceivers) plus a built-in pre-amp. There is a
switch for PTT (push to talk) and also a lock feature.
The mic impedance may be set for 50K ohms or 500 ohms.
The frequency response is 150 Hz to 10 kHz (-6dB) with
the Preamp off and 200 Hz to 7 kHz (-6 dB) with the Preamp
on.

The heavy zinc die-cast base provides extra stability. The
mic terminates to a standard 8 pin mic plug. The preamp
requires two AA cells which are mounted through the bottom
of the base. Please note that the earlier MC-60 (non-"A")
version featured a 4 pin mic plug and did not have UP-DOWN
tuning.

This one works 100% and looks very close to new.

With paper work for $100.


Hand Microphone with round 8 pin plug for Kenwood, Alinco, etc.

This hand mic works great on most Kenwood rigs with the
round 8 pin connector, such as the TS-430, TS-440, TM-241,
TM-2530, TW-4000, and others, including Alinco and ADI.
It says "Electret Condenser Mic" on the back, and
"Kenwood" on the front, with no model number.

Basically, this mic functions like an MC-43, with a couple
more features. It has the mic and PTT switch; it also has
up/down switches on the top. There are four "extra" buttons
labeled Call, VFO, MR, and PF. What these four buttons do
depends on the rig. There is also a "Lock" switch on the back.

Regardless if you use the four extra buttons or not, you
still have a mic that works like an MC-43.

This mic works fine, and looks like new. I am guessing it
came with a rig, and was immediately put in the drawer,
and never used. $30


Original Boxes for Kenwood VHF / UHF Rigs:

The following original boxes for Kenwood equipment
are available.  They are all in very nice condition,
and include the molded styrofoam inserts to protect
the rig, plus the box itself.

Kenwood TM-221 two meter transceiver $5


Antennas for your HT:

All rubber ducks are for 2 meters, are in good
condition, and are $10 each, unless stated otherwise.

BNC - Dual Band (2 m and 440 MHz) Telescoping antenna
provides significant gain when extended, $18

BNC - As used on most HTs, 7 inches long

BNC - Original Alinco EA0024, about 4 inches long

BNC - Original from Kenwood TH-215, about 5 inches long

BNC - "Stubby" about 4 1/2 inches long

Type F connector - 6.5 inches long

BNC Stubby for 440 MHz, 3 inches long

Threaded (as used by Motorola, etc.) stubby for 440 MHz

Not a Rubber Duck, but can be used on your HT:
Telescoping Antenna w/ BNC about 19 inches long
can be used as a quarter wave antenna on 2 m,
or on 220, or 450 MHz if telescoped shorter. $12


Accessories for the Kenwood TH-21 / 31 / 41 series HTs:

Antenna adapter that fits the TH-21 series HTs, and has
an SO-239 on the other end, to accept a PL-259. $5

Antenna adapter that fits the TH-21 series HTs, and has
a BNC on the other end. $8

Kenwood SC-8 T "Soft Case" for any of the TH-21 series HTs
great condition $12

Original Operating manual for TH-21 HT for 2 meters $8

Kenwood W09-0315 charger
This charger is used to charge the larger PB-21 H batteries
for the TH-21 series, and also on other Kenwood radios.
It has a standard 2.1 mm coaxial connector. $12


HT Belt Clips and Wrist Straps:

Belt Clips:
All include the hardware with the belt clip and are $6 each.
Icom IC-2 AT
Kenwood BH-6
Motorola
Yaesu FT-207
Yaesu FT-209

Wrist Straps for various HTs - $4 each
Kenwood TH-215 / 225 / 415, TR-2500, etc.
Kenwood TR-2400
Yaesu FT-209


Two position "Strip Line" Coax Switches:

These switches utilize metal cavity construction for max efficiency
and high isolation. Isolation is better than 50 dB at 300 MHz
with low insertion loss less.
All are two position and are typically rated for 2500 W PEP,
and good to 600 MHz.

Diawa CS-201 - $22
Opek CX-201 - $22
MFJ 1702 C - With center position that grounds both antennas,
and added lightning protection. $25


APC "Pro 7" Noise Filter and Surge Suppressor:

This unit has 7 outlets, with a 6 foot cord, and provides
surge suppressor for your equipment. It also provides
noise filtering / EMI / RFI suppression of 60 db. There
is $75,000 worth of insurance included. It comes with a
lifetime warranty, and I think this is APC's "Top of the
line" unit.

Detailed specs can be found at
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=PRO7

This one appears to be new, unused, in its original box. $18


Original Manuals for Kenwood equipment:

All manuals are in very nice condition, for Kenwood equipment.
All are Operating manuals unless otherwise specified.
All are original manuals only.

SPECIAL:
Buy two, three, or four of my books/manuals, and take 10% off.
Buy five or more and take 20% off.

TH-21 HT for 2 m, $8
TH-215/315/415 HT for 2 m, 220 MHz, or 440 MHz, $10
TH-225, 2 m HT, $12
TH-235, 2 m HT, $15
TH-241/441/541 mobile FM transceivers
...For 2 m, 440 MHz, & 1200 MHz, $12
TM-221/421 2 m or 440 MHz mobile, $12
TM-261/461 2m or 440 MHz mobile, $12
TM-2570/2550/2530 2 m mobile, $15
TR-2400, 2 m HT, $12
Service manual for TR-2600, 2 m HT, $12
TR-9000, 2 m multimode, $12
TS-120 S/V, HF xcvr, $20
TW-4000 dual bander mobile, $15
Service manual for TW-4000 dual bander $20
TW-4100 dual band mobile, $15

BC-5 DC to DC quick charger $2
LF-30A Low Pass Filter $5
MC-30 & MC-35 hand microphones $4
MS-1 mobile stand $3
PB-1, PB-2, PB-3, & PB-4 battery packs $3
PB-24 battery pack for TR-2400 $2
PB-25 H battery pack for TR-2500 $2
PS-6 power supply $5
PS-30 power supply $4
SMC-24 speaker mic $3
SMC-25 speaker mic $3
SP-430 speaker $2
SP-820 Speaker $2

These are original Kenwood manuals only.


Versi?n en espa?ol de Kenwood TM G-707 manual de Venta:

Versi?n en espa?ol del Manual de Operaci?n
para el Kenwood TM G-707 transmisor-receptor de banda dual

Este es el manual de instrucciones original, en espa?ol.
Parece que es bastante extensa y detallada.
Es b?sicamente nuevo, s?lo se abre para observar que
es s?lo en espa?ol. Es original de Kenwood.

$ 8 m?s gastos de env?o de la Florida.

Spanish Version of Kenwood TM G-707 manual:

Spanish version of the Operating Manual
for the Kenwood TM G-707 dual band transceiver

This is the original operating manual only, in Spanish.
It looks like it is quite extensive and detailed.
It is basically new, only being opened to observe that
it is in Spanish only. It is original from Kenwood. $8


I also have many other accessories available such as many
different types of microphones, HTs, HF, VHF and UHF rigs, HF
and VHF/UHF antennas, etc.
Just too many to list here. Please e-mail your requests.


Prices do not include shipping from Florida.

Thanks.

73,

Ken, W8EK

Ken Simpson
E-mail to W8EK at FLHam.net or W8EK at arrl.net
Voice Phone (352) 732-8400






From w5jo at brightok.net  Mon Aug 25 17:45:35 2014
From: w5jo at brightok.net (Jim Wilhite)
Date: Mon, 25 Aug 2014 16:45:35 -0500
Subject: [AMRadio] Headphones
Message-ID: <64BE141B415C4563BA7E7300B26ECB25@JimPC>

I haven?t dinked with headphones since about 1958 until today.  If you have the volume up too high when you plug them in, you can injure your hearing.  And a set of cans will, over time, do the same.  A good friend and fellow ham passed away and I am trying to help his widow sell what he had.  I bet there were 10 sets of headphones and this afternoon I tried to pair them with any equipment so as to enhance the sale a bit.

It was when I picked up a set made by (for) Telex that a label caught my eye.  They had 8 ohms on the label so I looked at another pair made by another company and it said 16.  What is the deal, are all manufacturers making headphones for audio and the audio builders making outputs the same as speakers?  What ever happened to high impedance phones?

Is this common?  He had a Heil headset with mic so that makes me wonder the impedance of them.

Can anyone explain.

Jim
W5JO

From amradio at mailman.qth.net  Mon Aug 25 18:11:48 2014
From: amradio at mailman.qth.net (Bill Guyger via AMRadio)
Date: Mon, 25 Aug 2014 15:11:48 -0700
Subject: [AMRadio] Headphones
In-Reply-To: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
Message-ID: <1409004708.48259.YahooMailNeo@web125301.mail.ne1.yahoo.com>

I think the impedances?a lot of newer headsets are driven (pardon the pun) by what chips are in the radios, amps, etc. The headsets you see sportscasters wearing on TV are generally Sennheiser HMD-25's at about $450.00 a pop......I own 4 of them for doing sports originations for NBA, NHL, and MLB radio broadcasts. Mine all have Sennheiser's standard?600 Ohm drivers since my headphone amps can deliver serious power to the higher Z phones. An acquaintance has to use the same headsets with 80 Ohm drivers since his amps?are built around LM 386 chips operating?barefoot where as mine have current booster transistors or IC Current Drivers?driven by NE5534's. 

FWIW the reason the HMD-25's are the de facto standard is that they don't mess up the "talent's" hair since they're so light weight. Beyer 290's sound much better (at half the price)?but they're built like Panzer tanks. I use the Beyer cans?personally since they shut out the ambient noise and I can hear?what I'm mixing better and I don't care about headphone hair.?

I'm pretty sure the ear buds you see the?youngsters destroying their hearing with (or at least isolating themselves from having to interact with those around them) are pretty high Z too.?

Bill AD5OL 


On Monday, August 25, 2014 4:46 PM, Jim Wilhite <w5jo at brightok.net> wrote:
  


I haven?t dinked with headphones since about 1958 until today.? If you have the volume up too high when you plug them in, you can injure your hearing.? And a set of cans will, over time, do the same.? A good friend and fellow ham passed away and I am trying to help his widow sell what he had.? I bet there were 10 sets of headphones and this afternoon I tried to pair them with any equipment so as to enhance the sale a bit.

It was when I picked up a set made by (for) Telex that a label caught my eye.? They had 8 ohms on the label so I looked at another pair made by another company and it said 16.? What is the deal, are all manufacturers making headphones for audio and the audio builders making outputs the same as speakers?? What ever happened to high impedance phones?

Is this common?? He had a Heil headset with mic so that makes me wonder the impedance of them.

Can anyone explain.

Jim
W5JO
______________________________________________________________
Our Main Website: http://www.amfone.net/
AMRadio mailing list
Archives: http://mailman.qth.net/pipermail/amradio/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

This list hosted by: http://www.qsl.net/
Please help support this email list: http://www.qsl.net/donate.html

From ne1s at securespeed.us  Mon Aug 25 20:03:13 2014
From: ne1s at securespeed.us (ne1s at securespeed.us)
Date: Mon, 25 Aug 2014 20:03:13 -0400 (EDT)
Subject: [AMRadio] Headphones
In-Reply-To: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
Message-ID: <9119618acaaabb705f918a10701d0733.squirrel@mail.myottmail.com>

> It was when I picked up a set made by (for) Telex that a label caught my
> eye.  They had 8 ohms on the label so I looked at another pair made by
> another company and it said 16.  What is the deal, are all manufacturers
> making headphones for audio and the audio builders making outputs the same
> as speakers?  What ever happened to high impedance phones?
>
> Is this common?  He had a Heil headset with mic so that makes me wonder
> the impedance of them.
>
> Can anyone explain.
>

Jim,

Headphone impedances vary all over the place, both in a nominal sense, and
in an actual sense. The impedances usually quoted are all nominal
impedances - actual will be a (rather strong) function of audio frequency.

"High impedance" headsets were the norm back in the days of crystal sets
and regens, and the typical nominal impedance was 2000 ohms. They are less
common today, although I hesitate to say "no longer manufactured" because
I don't know that for a fact.

Headphones with a nominal impedance of 600 ohms were common in and around
the WWII timeframe for military applications.

Really low impedance 'phones, such as 8-ohm nominal, I believe came about
during the early days of high-fidelity.

Bill Guyer provided a good comment about lower-Z 'phones being compatible
with today's direct-coupled solid-state output chips and circuits, so
that's what we encounter mostly today in consumer electronics, for
example. From what I've seen nominal impedances ranging from 8 ohms to
around 100 ohms are common. (BTW, I'm having good results driving a pair
of such 'phones directly, i.e. without an impedance-matching transformer,
from a 6V6 cathode follower - although the math says the impedance of the
cathode follower is too high, I get adequate volume and great fidelity.
The 'phones are coupled to the 6V6 cathode through a big electrolytic
cap.)

Since I'm not a broadcast or recording engineer I can't comment on what's
standard today in broadcast or studio applications, but Bill touched on
that.

73,
-Larry/NE1S


From ranchorobbo at gmail.com  Mon Aug 25 20:57:19 2014
From: ranchorobbo at gmail.com (Rob Atkinson)
Date: Mon, 25 Aug 2014 19:57:19 -0500
Subject: [AMRadio] Headphones
In-Reply-To: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
Message-ID: <CALWD7Z55a1EtEobQ5i1R0U77oeZzU1Q4r5H_D++YCUxRU_kvEg@mail.gmail.com>

The cans seem to be kind of like mics in that they were high Z years
ago and now they're low Z.

By "years ago" I mean the days of ship to shore radiotelegraphy with
commercial ops operating CW and wearing the headsets with crystal
elements or some other type of transducer that was a few thousand
ohms.   they were worn in front of the ears; not over them.

The modern headphones that cover the ear and are primarily made for
high fidelity stereo are all made to match the modern audio gear so
they are low Z, certainly under a few hundred ohms.

More interesting but one of those no-fact/all opinion type issues is
how, when, and why to use them.  I have gotten to where I dislike
wearing them, mostly because I have learned how to setup and use
speakers for phone operating and in my opinion, once you have
experienced a good sounding station on a great speaker driven by a
receiver with a great audio section you'll never want to go back to
headphones.  But most hams these days who chase DX, operate contests,
and SSB wouldn't think of not using them.   I think the reason partly
has to do with them not knowing what speaker works best for ham radio.
I made the mistake of doing what any modern day audio guy would
probably do--I picked up a pair of like new, large JBL three way
speakers at a garage sale and used them.  For a stereo they were
probably great but for short wave AM radio they were not good.  It
turned out that for short wave radio with a vintage receiver, nothing
beat a good old 8 ohm full range 12 inch speaker in a large wood bass
reflex cabinet.

Only time I use headphones now is when I want to carefully listen to
my own transmit audio, and when I have to copy a weak signal, usually
on 160 m. or when I operate CW.

73

Rob
K5UJ


On Mon, Aug 25, 2014 at 4:45 PM, Jim Wilhite <w5jo at brightok.net> wrote:
> I haven't dinked with headphones since about 1958 until today.  If you have the volume up too high when you plug them in, you can injure your hearing.  And a set of cans will, over time, do the same.  A good friend and fellow ham passed away and I am trying to help his widow sell what he had.  I bet there were 10 sets of headphones and this afternoon I tried to pair them with any equipment so as to enhance the sale a bit.
>
> It was when I picked up a set made by (for) Telex that a label caught my eye.  They had 8 ohms on the label so I looked at another pair made by another company and it said 16.  What is the deal, are all manufacturers making headphones for audio and the audio builders making outputs the same as speakers?  What ever happened to high impedance phones?
>
> Is this common?  He had a Heil headset with mic so that makes me wonder the impedance of them.
>
> Can anyone explain.

From kt4ae at bellsouth.net  Mon Aug 25 21:16:00 2014
From: kt4ae at bellsouth.net (Harry Vaught, KT4AE)
Date: Mon, 25 Aug 2014 21:16:00 -0400
Subject: [AMRadio] Headphones
In-Reply-To: <9119618acaaabb705f918a10701d0733.squirrel@mail.myottmail.com>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
	<9119618acaaabb705f918a10701d0733.squirrel@mail.myottmail.com>
Message-ID: <53FBDFD0.9080705@bellsouth.net>

I'm going to generalize, based on a small number of personal 
observations, that modern rigs have 8-16 ohm headphone outputs (TS-590, 
for instance) versus the higher stated impedances of vintage rigs. 
Interestingly, My later Hallicrafters have the headphone output taken 
from the 3.2 ohm tap of the output transformer while stating a 50-2000 
impedance for headphones.

I have a number of headphones which I use with ham gear, stereo or 
computers.  Most are 8 ohms and one is 260.  My only communication 
headphones are Kenwood HS-5's at 8 ohms.  It doesn't seem to matter what 
I plug into what except the Kenwoods are mono and the stereo phones need 
mono adapters for communication use.

For amateur radio, I use headphones all the time for a couple of 
reasons, chief among them is that I'm old and losing my hearing.  The 
isolation of headphones helps concentration and prevents distraction. 
They also let my wife know not to interrupt.


Harry, KT4AE
Watkinsville, Georgia

From w5jo at brightok.net  Tue Aug 26 09:30:06 2014
From: w5jo at brightok.net (Jim Wilhite)
Date: Tue, 26 Aug 2014 08:30:06 -0500
Subject: [AMRadio] Headphones
In-Reply-To: <53FBDFD0.9080705@bellsouth.net>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC><9119618acaaabb705f918a10701d0733.squirrel@mail.myottmail.com>
	<53FBDFD0.9080705@bellsouth.net>
Message-ID: <FA6557C0C78649199E29F7EE785D1B9B@JimPC>


Thanks guys for the explanation on the headphone deal.  This seems to be 
nothing more than the march of technology.  I am just glad it is electronic 
technology rather than that of mussed hair.

I noticed  some of the football coaches are wearing headphones with the 
Motorola bat wings on them but they are great big cans that look they are 
made to reduce the noise on the field.  I didn't know Motorola made such a 
thing, but then again I didn't know Motorola made consumer GPS units until I 
bought one sometime back.  It wasn't up to standards compared to Motorola 
standards of years back.  When the inside of my car heated up the touch 
screen on the GPS quit working.

Jim
W5JO 


From amradio at mailman.qth.net  Tue Aug 26 10:02:51 2014
From: amradio at mailman.qth.net (Bill Guyger via AMRadio)
Date: Tue, 26 Aug 2014 09:02:51 -0500
Subject: [AMRadio] Headphones
In-Reply-To: <FA6557C0C78649199E29F7EE785D1B9B@JimPC>
References: <64BE141B415C4563BA7E7300B26ECB25@JimPC>
	<9119618acaaabb705f918a10701d0733.squirrel@mail.myottmail.com>
	<53FBDFD0.9080705@bellsouth.net>
	<FA6557C0C78649199E29F7EE785D1B9B@JimPC>
Message-ID: <38ED04A0-F870-4D27-99B6-7458EFA2BB4A@yahoo.com>

The Motorola headsets coaches are wearing are part of a Motorola wireless intercom system. When the system was first introduced to the NFL the thing operated in the 450 and / or 455 MHz broadcast RPU bands. Needless to say that caused a flap with broadcasters not being able to use legally assigned frequencies at sporting events. There were more than a few broadcast frequency coordinators that said FU and walked out....

Bill AD5OL

Sent from my iPhone

> On Aug 26, 2014, at 8:30 AM, "Jim Wilhite" <w5jo at brightok.net> wrote:
> 
> 
> Thanks guys for the explanation on the headphone deal.  This seems to be nothing more than the march of technology.  I am just glad it is electronic technology rather than that of mussed hair.
> 
> I noticed  some of the football coaches are wearing headphones with the Motorola bat wings on them but they are great big cans that look they are made to reduce the noise on the field.  I didn't know Motorola made such a thing, but then again I didn't know Motorola made consumer GPS units until I bought one sometime back.  It wasn't up to standards compared to Motorola standards of years back.  When the inside of my car heated up the touch screen on the GPS quit working.
> 
> Jim
> W5JO 
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From amradio at mailman.qth.net  Tue Aug 26 21:16:01 2014
From: amradio at mailman.qth.net (CL in NC via AMRadio)
Date: Tue, 26 Aug 2014 18:16:01 -0700
Subject: [AMRadio] Meissner coil info
Message-ID: <1409102161.3556.YahooMailBasic@web160605.mail.bf1.yahoo.com>

A couple years ago, I think somebody posted winding data for Meissner Signal Shifter coils here.? Does somebody have that info available for the 1941 Deluxe?

Charlie, W4MEC in NC


From w4wsz at embarqmail.com  Wed Aug 27 20:51:30 2014
From: w4wsz at embarqmail.com (Bob)
Date: Wed, 27 Aug 2014 20:51:30 -0400
Subject: [AMRadio] Ceramic Capacitors
Message-ID: <004d01cfc25a$353c1950$9fb44bf0$@embarqmail.com>

I have an assortment of these caps..most are new... just old....one is new
in the box.

500 pf/20kv New in Box

(2) 25 mmf type 850S

50 pf/7.5kv

500 mmf/10kv

.001 mfd/10kv

500 mmf/20kv

375 pf/30kv

Plus 6 or 8 that the value has worn off due to age.  I would like to sell
all of them at a fair price (not the e-bay) price.

 

If you can use these, send me an e-mail......I am sure we can make a deal
that make us both happy.

 

Thanks,

Bob,W4WSZ

w4wsz at embarqmail.com


From randyn3lrx at gmail.com  Sat Aug 30 00:45:45 2014
From: randyn3lrx at gmail.com (Randall Berry)
Date: Sat, 30 Aug 2014 00:45:45 -0400
Subject: [AMRadio] WANTED: 274 Ohm Resistor
Message-ID: <540156F9.60003@gmail.com>

This may be slightly off topic I guess, but does anyone have a 274 ohm
resistor or in their stash willing to drop one in an envelope? I see
some on ebay but I don't need 100 of them and don't really need 2 or 3
watts, but I'll take it if that's all you have. Ideally 1/4-1/2 will
suit fine. I'll gladly pay a few bucks for your troubles.

Address is good on qrz. Please contact me first and let me know so I can
update this thread. I'd hate to have a dozen people blindly sending me
resistors.

tnx es 73 de Randy, N3LRX

From randyn3lrx at gmail.com  Sat Aug 30 08:08:18 2014
From: randyn3lrx at gmail.com (Randall Berry)
Date: Sat, 30 Aug 2014 08:08:18 -0400
Subject: [AMRadio] [Boatanchors] WANTED: 274 Ohm Resistor
In-Reply-To: <D1935235BB7F4711B3DF439C7D0059F2@WORKSHOP>
References: <540156F9.60003@gmail.com>
	<D1935235BB7F4711B3DF439C7D0059F2@WORKSHOP>
Message-ID: <5401BEB2.5060207@gmail.com>

  Hi Brian,

I bought a Sark100 antenna analyzer, It uses a 50, a 150, and a 274 ohm 
resistors to calibrate it in 3 stages. I've got the 50 (48.9), (2 100's 
parallel) and the 150 (148.7), both at 5%, (Plus my meters margin of 
error, at .1 ohm shorted) I just need the 274. Not sure how close 
tolerance it's looking for. I guess I could try a 270 5% it can't hurt. 
Rat Shack has a card of 5 at 5% for a buck fitty. A bit more than forty 
cents but Rat Shack is all I've got for local parts. I guess there's 
nothing stopping me from bringing in my VOMit and testing in the store 
for the closest.

Thanks,
Randy, N3LRX

On 08/30/2014 04:43 AM, Brian Clarke wrote:
> Hello Randy,
>
> Buy a strip of 10off 270 Ohm, 0.25 W resistors, 10% tolerance. Should
> cost all of 40c total. Measure them all on a good Ohmmeter - you should
> find at least one that is close to 274 Ohm. After all, 274 is only 1.5%
> away from 270. (Statistically, you have better than 30% likelihood of
> finding at least one that is close to 274 Ohm)
>
> More seriously, I would question why you can't just use a 270 Ohm
> resistor anyway.
>
> 73 de Brian, VK2GCE.
>
> On : [Boatanchors] WANTED: 274 Ohm Resistor, you said:
>
>
>> This may be slightly off topic I guess, but does anyone have a 274 ohm
>> resistor or in their stash willing to drop one in an envelope? I see
>> some on ebay but I don't need 100 of them and don't really need 2 or 3
>> watts, but I'll take it if that's all you have. Ideally 1/4-1/2 will
>> suit fine. I'll gladly pay a few bucks for your troubles.
>>
>> Address is good on qrz. Please contact me first and let me know so I can
>> update this thread. I'd hate to have a dozen people blindly sending me
>> resistors.
>>
>> tnx es 73 de Randy, N3LRX
>


From wa1rkt at comcast.net  Sat Aug 30 08:28:21 2014
From: wa1rkt at comcast.net (Rick Poole WA1RKT)
Date: Sat, 30 Aug 2014 12:28:21 +0000 (UTC)
Subject: [AMRadio] [Boatanchors] WANTED: 274 Ohm Resistor
In-Reply-To: <5401BEB2.5060207@gmail.com>
References: <540156F9.60003@gmail.com>
	<D1935235BB7F4711B3DF439C7D0059F2@WORKSHOP>
	<5401BEB2.5060207@gmail.com>
Message-ID: <854774677.4285413.1409401701406.JavaMail.root@comcast.net>

One thing to consider... if you need a precision 274-ohm resistor that probably also means you need it to be stable over temperature.  5% and 10% resistors, even if you find one that measures at 274 ohms, are unlikely to maintain that value very closely over a wide temperature range.

Rick WA1RKT


On 08/30/2014 04:43 AM, Brian Clarke wrote:
> Hello Randy,
>
> Buy a strip of 10off 270 Ohm, 0.25 W resistors, 10% tolerance. Should
> cost all of 40c total. Measure them all on a good Ohmmeter - you should
> find at least one that is close to 274 Ohm. After all, 274 is only 1.5%
> away from 270. (Statistically, you have better than 30% likelihood of
> finding at least one that is close to 274 Ohm)
>
> More seriously, I would question why you can't just use a 270 Ohm
> resistor anyway.
>
> 73 de Brian, VK2GCE.

