[Boatanchors] Boatanchors Digest, Vol 86, Issue 70
Henry Mei'l's
meils at get2net.dk
Thu Mar 31 11:47:54 EDT 2011
----- Original Message -----
From: <boatanchors-request at mailman.qth.net>
To: <boatanchors at mailman.qth.net>
Sent: Thursday, March 31, 2011 4:39 PM
Subject: Boatanchors Digest, Vol 86, Issue 70
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> Today's Topics:
>
> 1. Re: OT power xfmr protection (Paul Kraemer)
> 2. ELDICO transmitter update - Parts search - dual FT 243 socket
> (Greg Mijal)
> 3. WTB: Central Electronics 600L Amplifier (Jim DiMauro)
> 4. Re: Coax Switches and Wire Antennas (Bill Stewart)
> 5. Re: Coax Switches and Wire Antennas (Bill Stewart)
> 6. Re: ELDICO transmitter update - Parts search - dual FT 243
> socket (Al Parker)
> 7. Re: WTB: Central Electronics 600L Amplifier (Carl)
> 8. Re: WTB: Central Electronics 600L Amplifier (D C *Mac* Macdonald)
> 9. Re: WTB: Central Electronics 600L Amplifier (Jim DiMauro)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 30 Mar 2011 21:31:35 -0500
> From: "Paul Kraemer" <elespe at lisco.com>
> Subject: Re: [Boatanchors] OT power xfmr protection
> To: <jfor at quik.com>
> Cc: boatanchors at mailman.qth.net, Dick KF4NS <kf4nsradio at verizon.net>
> Message-ID: <BD3EBBA582264A8AA702F897011A0F16 at ENGR2>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Sorry
> That was implied
> Always a primary fuse
> Paul
> ----- Original Message -----
> From: "J. Forster" <jfor at quik.com>
> To: "Paul Kraemer" <elespe at lisco.com>
> Cc: "Dick KF4NS" <kf4nsradio at verizon.net>; <boatanchors at mailman.qth.net>
> Sent: Wednesday, March 30, 2011 8:17 PM
> Subject: Re: [Boatanchors] OT power xfmr protection
>
>
>> In addition to the primary, probably yes. Instead of a primary fuse, NO.
>>
>> -John
>>
>> ===============
>>
>>
>>> Fuse ct of hv secondaries. Like tv sets used to have
>>> Paul K0UYA
>>> ----- Original Message -----
>>> From: "Dick KF4NS" <kf4nsradio at verizon.net>
>>> To: <boatanchors at mailman.qth.net>
>>> Sent: Wednesday, March 30, 2011 5:10 PM
>>> Subject: [Boatanchors] OT power xfmr protection
>>>
>>>
>>>> Need some ideas here. My brother has an old Seeburg jukebox and
>>>> someone told him he better get the xfmrs some overload protection.
>>>> This thing does not have a single power supply. Each audio amp (R-L)
>>>> has it's own power supply.
>>>>
>>>> I thought about getting him those overcurrent relays for the
>>>> secondaries and the primaries already have fuses. Maybe just the old
>>>> fashioned crowbar would do the trick. Zeners would be useless at those
>>>> voltages and an SCR would be a bit of overkill.
>>>>
>>>> What are your thoughts?
>>>>
>>>> 73, Dick KF4NS
>>>> St Petersburg, FL 33714 USA
>>>> Keep The Glow!
>>>>
>>>> ______________________________________________________________
>>>> Boatanchors mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>>> Help: http://mailman.qth.net/mmfaq.htm
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>>>>
>>>> List Administrator: Duane Fischer, W8DBF
>>>> ** For Assistance: dfischer at usol.com **
>>>>
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
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>>>
>>> This list hosted by: http://www.qsl.net
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>>>
>>
>>
>>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 30 Mar 2011 23:07:15 -0400
> From: "Greg Mijal" <bluebirdtele at embarqmail.com>
> Subject: [Boatanchors] ELDICO transmitter update - Parts search - dual
> FT 243 socket
> To: <boatanchors at mailman.qth.net>
> Cc: eldico at mailman.qth.net, milsurplus at mailman.qth.net
> Message-ID: <B8D2DD203A374F98BDCD6D9871B6947A at userdff40e0b99>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi:
> The Eldico TR??? transmitter I bought on Ebay arrived today.
> The seller did a good job packing and no damage found.
> I went into my Garage junk box and found the right 10x7 chassis cover
> (shroud?).
> Tubes supplied with the rig are 5U4 6AG7 807
> I'm still not exactly sure which model transmitter I bought.
> Also, I am looking to buy or trade for a dual FT 243 chassis mount crystal
> socket.
> Please emal me for a picture if you want to do the model ID.
> Thanks!
> Greg
> WA7LYO
> Kinston NC
>
> ------------------------------
>
> Message: 3
> Date: Thu, 31 Mar 2011 07:10:43 -0400
> From: "Jim DiMauro" <radio6146 at gmail.com>
> Subject: [Boatanchors] WTB: Central Electronics 600L Amplifier
> To: "Boatanchors" <boatanchors at mailman.qth.net>
> Message-ID: <000c01cbef94$471afb60$d550f220$@com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi All:
>
>
>
> I'd like to find a 600L to pair up with my 100V. A working unit is
> preferred, but not absolutely necessary. Does anyone have one that they'd
> care to part with?
>
>
>
> 73,
>
> Jim
>
> W2BVM
>
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 31 Mar 2011 08:15:46 -0400 (EDT)
> From: Bill Stewart <cwopr at embarqmail.com>
> Subject: Re: [Boatanchors] Coax Switches and Wire Antennas
> To: boatanchors at mailman.qth.net
> Message-ID:
> <37646069.254640.1301573746346.JavaMail.root at md37.embarq.synacor.com>
> Content-Type: text/plain; charset=utf-8
>
> Hello Dave,
> I do use knife switches with my windom, but I will be using more xmtrs
> with the long wire so wanted something a little more convenient. As the
> kids would say, knife switches are totally coool, man. Tnx for the
> input...Bill
>
> ----- Original Message -----
> From: "Dave Reynolds" <k6wrf at k6wrf.com>
> To: "Bill Stewart" <cwopr at embarqmail.com>, boatanchors at mailman.qth.net
> Sent: Wednesday, March 30, 2011 8:19:27 PM
> Subject: Re: [Boatanchors] Coax Switches and Wire Antennas
>
> Hi Bill,
> Just remember, there are no stupid questions just stupid answers.
> When I go to the swap meets out here I usually see quite a few knife
> switches.I have a couple of them that I use for switching.
> Hope this isn't a Stoopid answer.
>
> cu es gl
> Dave K6WRF
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 31 Mar 2011 08:25:17 -0400 (EDT)
> From: Bill Stewart <cwopr at embarqmail.com>
> Subject: Re: [Boatanchors] Coax Switches and Wire Antennas
> To: boatanchors <boatanchors at mailman.qth.net>
> Message-ID:
> <2092986669.254693.1301574317210.JavaMail.root at md37.embarq.synacor.com>
>
> Content-Type: text/plain; charset=utf-8
>
>
>
> Dennis,
>
> I have been using the classic windom or Off Center fed Hertz, for about
> ten years. It was the antenna suggested for the 1929 TNT osc I built. It
> works very well and is only about 30 feet up in amongst a bunch of pines.
> It's a simple antenna and easy to hook up to the '29 rigs and other
> homebrew one tubers I have built.
>
>
>
> Tnx for the voltage est. I have several good ideas to try. May even try a
> good quality coax switch if I can find one at a good price. Tnx to all for
> your input.
>
> 73, Bill K4JYS
>
>
> ----- Original Message -----
> From: "mac" <w7qho at aol.com>
> To: "Bill Stewart" <cwopr at embarqmail.com>
> Cc: "boatanchors" <boatanchors at mailman.qth.net>
> Sent: Wednesday, March 30, 2011 8:03:03 PM
> Subject: Re: [Boatanchors] Coax Switches and Wire Antennas
>
> Bill,
>
>
> OK. ?Been a while since I've run across anyone using the old single wire
> fed Windom. ?Used one myself back in the 50's with good results as I
> recall. ?Same configuration called out in the SCR-284 manual. ?Back in the
> 1930's the U.S. Forrest Service used them too.
>
>
> On the half wave end fed yes, feeding right at the high impedance/high
> voltage point. ?Essentially the same situation if you stretch the wire out
> to a full wave. ? On a quick calculation you could seeing something like
> 500 volts peak ?with 75 watts into the end of the wire (est. 2500 ohms
> input Z). ?Probably get away OK with the coax switch at that power level
> unless one of the small, cheap CB models. ?Gary's idea of a sheet of plexi
> with banana jacks a better way to go, though.
>
>
> I've been using "voltage fed" wires for years, BTW. with power levels up
> to legal max (something like 2500 volts peak at the feed point). ?Use an
> "L" matching network at the base of the antenna and coax from there into
> the shack.
>
>
> Good luck.
>
>
>
>
>
>
>
> Dennis D. W7QHO
> Glendale, CA
>
>
> *************
>
>
>
> On Mar 30, 2011, at 4:19 PM, Bill Stewart wrote:
>
>
> Tnx Dennis for the response.
> I use the classic windom for some of the homebrew rigs and it works quite
> well. In the coax switch situation, I will probably be using a simple 80
> mtr half wave wire, which has the max voltage at the feed line end..so,
> maximum arcing possibilities. I may expand it to a full wave just to see
> how it works..more length dependent on tree density. I'm using low power
> xmtrs such as the AT-1, Lysco, Globe Chief 90A, etc, so no big power. I
> will be using it on harmonically related bands. I do use some knife
> switches, but it takes several with the number of xmtrs I will be using. ?
>
> 73, Bill K4JYS ?
> ----- Original Message -----
> From: "mac" < w7qho at aol.com >
> To: "Bill Stewart" < cwopr at embarqmail.com >
> Cc: "boatanchors" < boatanchors at mailman.qth.net >
> Sent: Wednesday, March 30, 2011 4:40:24 PM
> Subject: Re: [Boatanchors] Coax Switches and Wire Antennas
>
> Bill,
>
> ?If you plan to use the classic Windom (half wave top section, single ?
> wire feeder) the impedance looking into the feedwire "should" be ?
> something around 600 ohms. Cut and try required to find the correct ?
> tap point on the flat-top and the length of the feed wire and the ?
> ground system used also have an effect. ?Probably OK through your coax ?
> switch at the 75 watt level but only for the frequency/band for which ?
> the flat top was cut. ?On harmonic related frequencies (ex. 40M ?
> operation on a flat top cut for 75M) the impedance looking into the ?
> feedline could be just about anything.
>
> For the end-fed case, how long is the wire and what frequency/ ?
> frequencies are you using? ?OK for your switch if the feed point is ?
> anywhere near a current loop.
>
> Dennis D. W7QHO
> Glendale, CA
>
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 31 Mar 2011 09:52:37 -0400
> From: Al Parker <anchor at ec.rr.com>
> Subject: Re: [Boatanchors] ELDICO transmitter update - Parts search -
> dual FT 243 socket
> To: Greg Mijal <bluebirdtele at embarqmail.com>, BAqth
> <boatanchors at mailman.qth.net>
> Message-ID: <4D948725.8070504 at ec.rr.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi Greg,
> How bout Eldico TR-75-TV? 6L6 & 897, 1953 vintage.
> Couldn't find your earlier msg to see if you'd eliminated that
> possibility. Send a pic or 3.
> Al
>
> On 3/30/2011 11:07 PM, Greg Mijal wrote:
>> Hi:
>> The Eldico TR??? transmitter I bought on Ebay arrived today.
>> The seller did a good job packing and no damage found.
>> I went into my Garage junk box and found the right 10x7 chassis cover
>> (shroud?).
>> Tubes supplied with the rig are 5U4 6AG7 807
>> I'm still not exactly sure which model transmitter I bought.
>> Also, I am looking to buy or trade for a dual FT 243 chassis mount
>> crystal socket.
>> Please emal me for a picture if you want to do the model ID.
>> Thanks!
>> Greg
>> WA7LYO
>> Kinston NC
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>
> ------------------------------
>
> Message: 7
> Date: Thu, 31 Mar 2011 10:22:09 -0400
> From: "Carl" <km1h at jeremy.mv.com>
> Subject: Re: [Boatanchors] WTB: Central Electronics 600L Amplifier
> To: "Jim DiMauro" <radio6146 at gmail.com>, "Boatanchors"
> <boatanchors at mailman.qth.net>
> Message-ID: <005401cbefaf$0731ca90$6601a8c0 at DAVES>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> A classic NCL-2000 makes more noise! The gain of the 600L isnt enough to
> tell most of the time but it makes a nice driver for a 3CX3000A7, YC-156,
> etc (-;
>
> A 100V, 75A4 and NCL-2000 was still a hot setup in the 60's.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Jim DiMauro" <radio6146 at gmail.com>
> To: "Boatanchors" <boatanchors at mailman.qth.net>
> Sent: Thursday, March 31, 2011 7:10 AM
> Subject: [Boatanchors] WTB: Central Electronics 600L Amplifier
>
>
>> Hi All:
>>
>>
>>
>> I'd like to find a 600L to pair up with my 100V. A working unit is
>> preferred, but not absolutely necessary. Does anyone have one that
>> they'd
>> care to part with?
>>
>>
>>
>> 73,
>>
>> Jim
>>
>> W2BVM
>>
>>
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ------------------------------
>
> Message: 8
> Date: Thu, 31 Mar 2011 09:34:43 -0500
> From: D C *Mac* Macdonald <k2gkk at hotmail.com>
> Subject: Re: [Boatanchors] WTB: Central Electronics 600L Amplifier
> To: <boatanchors at mailman.qth.net>
> Message-ID: <BLU129-W2524A92C13F267BDC975EBF1BF0 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Several NCL-2000 listed on the "bay" at current time.
>
> * * * * * * * * * * *
> * 73 - Mac, K2GKK/5 *
> * (Since 30 Nov 53) *
> * Oklahoma City, OK *
> * USAF, Ret (61-81) *
> * * * * * * * * * * *
>
>
>
> ----------------------------------------
>> From: km1h at jeremy.mv.com
>> To: radio6146 at gmail.com; boatanchors at mailman.qth.net
>> Date: Thu, 31 Mar 2011 10:22:09 -0400
>> Subject: Re: [Boatanchors] WTB: Central Electronics 600L Amplifier
>>
>> A classic NCL-2000 makes more noise! The gain of the 600L isn't enough to
>> tell most of the time but it makes a nice driver for a 3CX3000A7, YC-156,
>> etc (-;
>>
>> A 100V, 75A4 and NCL-2000 was still a hot setup in the 60s.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "Jim DiMauro"
>> To: "Boatanchors"
>> Sent: Thursday, March 31, 2011 7:10 AM
>> Subject: [Boatanchors] WTB: Central Electronics 600L Amplifier
>>
>>
>> > Hi All:
>> >
>> >
>> >
>> > I'd like to find a 600L to pair up with my 100V. A working unit is
>> > preferred, but not absolutely necessary. Does anyone have one that
>> > they'd
>> > care to part with?
>> >
>> >
>> >
>> > 73,
>> >
>> > Jim
>> >
>> > W2BVM
>
> ------------------------------
>
> Message: 9
> Date: Thu, 31 Mar 2011 07:39:14 -0700 (PDT)
> From: Jim DiMauro <radio6146 at yahoo.com>
> Subject: Re: [Boatanchors] WTB: Central Electronics 600L Amplifier
> To: Carl <km1h at jeremy.mv.com>, Jim DiMauro <radio6146 at gmail.com>,
> Boatanchors <boatanchors at mailman.qth.net>
> Message-ID: <480857.29391.qm at web161607.mail.bf1.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hi Carl:
>
> I appreciate your suggestion on the NCL2000, but I'm looking for an
> amplifier
> that covers 160 Meters, is broadband (no tune), runs a single 813 and
> matches
> the size and styling of the CE 100V.? Kinda narrows the field.? As for the
> noise
> factor, I live in NJ...noise is in ample supply.
>
> 73,
> Jim
> W2BVM
>
>
>
> ----- Original Message ----
> From: Carl <km1h at jeremy.mv.com>
> To: Jim DiMauro <radio6146 at gmail.com>; Boatanchors
> <boatanchors at mailman.qth.net>
> Sent: Thu, March 31, 2011 10:22:09 AM
> Subject: Re: [Boatanchors] WTB: Central Electronics 600L Amplifier
>
> A classic NCL-2000 makes more noise! The gain of the 600L isnt enough to
> tell most of the time but it makes a nice driver for a 3CX3000A7, YC-156,
> etc (-;
>
> A 100V, 75A4 and NCL-2000 was still a hot setup in the 60's.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Jim DiMauro" <radio6146 at gmail.com>
> To: "Boatanchors" <boatanchors at mailman.qth.net>
> Sent: Thursday, March 31, 2011 7:10 AM
> Subject: [Boatanchors] WTB: Central Electronics 600L Amplifier
>
>
>> Hi All:
>>
>>
>>
>> I'd like to find a 600L to pair up with my 100V.? A working unit is
>> preferred, but not absolutely necessary.? Does anyone have one that
>> they'd
>> care to part with?
>>
>>
>>
>> 73,
>>
>> Jim
>>
>> W2BVM
>>
>>
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ------------------------------
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> End of Boatanchors Digest, Vol 86, Issue 70
> *******************************************
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