From mjcal77 at yahoo.com  Sat May 15 11:06:46 2021
From: mjcal77 at yahoo.com (CL in NC)
Date: Sat, 15 May 2021 15:06:46 +0000 (UTC)
Subject: [AMRadio] Screwiest Elmac problem ever
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
Message-ID: <2003638591.512437.1621091206323@mail.yahoo.com>

Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is AF67 do something weird.  He is a regular check in on the Old Friends group that meets on 75 meter 3 times a week here in the Upstate SC area.  It was working just fine, then the mod fell off to a very low level.  It does have a new modulator interstage transformer from Hammond, which was installed long prior to this problem, the rest original.  He is getting 40 watts out in CW and AM, the modulator has been checked end to end, including terminating the output transformer with a 5K load where he read 300 volts P to P across the secondary.  When you hook it all back up, you get 10-20% mod max.  Voltages, components, all check good, she just won't modulate.  Any ideas?

Charlie, W4MEC in NC

From w5jo at brightok.net  Sat May 15 11:30:46 2021
From: w5jo at brightok.net (w5jo at brightok.net)
Date: Sat, 15 May 2021 10:30:46 -0500
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <2003638591.512437.1621091206323@mail.yahoo.com>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
Message-ID: <03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>

Hummmm! maybe a microphone, cord or connector for a start?

Jim
W5JO



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


Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is 
AF67 do something weird.  He is a regular check in on the Old Friends group 
that meets on 75 meter 3 times a week here in the Upstate SC area.  It was 
working just fine, then the mod fell off to a very low level.  It does have 
a new modulator interstage transformer from Hammond, which was installed 
long prior to this problem, the rest original.  He is getting 40 watts out 
in CW and AM, the modulator has been checked end to end, including 
terminating the output transformer with a 5K load where he read 300 volts P 
to P across the secondary.  When you hook it all back up, you get 10-20% mod 
max.  Voltages, components, all check good, she just won't modulate.  Any 
ideas?

Charlie, W4MEC in NC


From sparky52 at cox.net  Sat May 15 14:39:34 2021
From: sparky52 at cox.net (sparky52 at cox.net)
Date: Sat, 15 May 2021 11:39:34 -0700 (PDT)
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>
Message-ID: <282736964.2165910.1621103974195@myemail.cox.net>

Hello
Need a little more information ,has this unit been modified for class b modulation ,does it have the original bias battery . Has it been converted with 6ag7s . I certainly would check the mic and connectors ,then make sure you have enough drive off the 12au7 . If I remember correctly, it has been awhile but I thought it was 500 ohms not 5000 on the output ,but I will check. It was great rig in its day. Certainly there are enough old timers on this board to get this thing up and running.

John ac7xh

> On May 15, 2021 at 8:30 AM w5jo at brightok.net mailto:w5jo at brightok.net wrote:
> 
> 
>     Hummmm! maybe a microphone, cord or connector for a start?
> 
>     Jim
>     W5JO
> 
> 
> 
>     -----Original Message-----
> 
> 
>     Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is
>     AF67 do something weird. He is a regular check in on the Old Friends group
>     that meets on 75 meter 3 times a week here in the Upstate SC area. It was
>     working just fine, then the mod fell off to a very low level. It does have
>     a new modulator interstage transformer from Hammond, which was installed
>     long prior to this problem, the rest original. He is getting 40 watts out
>     in CW and AM, the modulator has been checked end to end, including
>     terminating the output transformer with a 5K load where he read 300 volts P
>     to P across the secondary. When you hook it all back up, you get 10-20% mod
>     max. Voltages, components, all check good, she just won't modulate. Any
>     ideas?
> 
>     Charlie, W4MEC in NC
> 
>     ______________________________________________________________
>     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 mailto:AMRadio at mailman.qth.net
>     To unsubscribe, send an email to amradio-request at mailman.qth.net mailto: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
>     Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net
> 

From sparky52 at cox.net  Sat May 15 15:09:29 2021
From: sparky52 at cox.net (sparky52 at cox.net)
Date: Sat, 15 May 2021 12:09:29 -0700 (PDT)
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>
Message-ID: <1881537805.2166273.1621105769642@myemail.cox.net>

hello

One more thing ,you might check the switch in the back that changes the type of mic ,from carbon to xtal may have been accidently thrown.

john ac7xh

> On May 15, 2021 at 8:30 AM w5jo at brightok.net mailto:w5jo at brightok.net wrote:
> 
> 
>     Hummmm! maybe a microphone, cord or connector for a start?
> 
>     Jim
>     W5JO
> 
> 
> 
>     -----Original Message-----
> 
> 
>     Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is
>     AF67 do something weird. He is a regular check in on the Old Friends group
>     that meets on 75 meter 3 times a week here in the Upstate SC area. It was
>     working just fine, then the mod fell off to a very low level. It does have
>     a new modulator interstage transformer from Hammond, which was installed
>     long prior to this problem, the rest original. He is getting 40 watts out
>     in CW and AM, the modulator has been checked end to end, including
>     terminating the output transformer with a 5K load where he read 300 volts P
>     to P across the secondary. When you hook it all back up, you get 10-20% mod
>     max. Voltages, components, all check good, she just won't modulate. Any
>     ideas?
> 
>     Charlie, W4MEC in NC
> 
>     ______________________________________________________________
>     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 mailto:AMRadio at mailman.qth.net
>     To unsubscribe, send an email to amradio-request at mailman.qth.net mailto: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
>     Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net
> 

From knjhanlon at msn.com  Sat May 15 15:20:31 2021
From: knjhanlon at msn.com (JAMES HANLON)
Date: Sat, 15 May 2021 19:20:31 +0000
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <1881537805.2166273.1621105769642@myemail.cox.net>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>,
	<1881537805.2166273.1621105769642@myemail.cox.net>
Message-ID: <SJ0PR01MB6509B556347DBA2A14E722E4A02F9@SJ0PR01MB6509.prod.exchangelabs.com>

While you're checking switches, make sure that the rotary switch in the rear is on the AM position.

Jim, W8KGI

________________________________
From: sparky52 at cox.net <sparky52 at cox.net>
Sent: Saturday, May 15, 2021 1:09 PM
To: w5jo at brightok.net <w5jo at brightok.net>; CL in NC <mjcal77 at yahoo.com>; amphone <amradio at mailman.qth.net>
Subject: Re: [AMRadio] Screwiest Elmac problem ever

hello

One more thing ,you might check the switch in the back that changes the type of mic ,from carbon to xtal may have been accidently thrown.

john ac7xh

> On May 15, 2021 at 8:30 AM w5jo at brightok.net mailto:w5jo at brightok.net wrote:
>
>
>     Hummmm! maybe a microphone, cord or connector for a start?
>
>     Jim
>     W5JO
>
>
>
>     -----Original Message-----
>
>
>     Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is
>     AF67 do something weird. He is a regular check in on the Old Friends group
>     that meets on 75 meter 3 times a week here in the Upstate SC area. It was
>     working just fine, then the mod fell off to a very low level. It does have
>     a new modulator interstage transformer from Hammond, which was installed
>     long prior to this problem, the rest original. He is getting 40 watts out
>     in CW and AM, the modulator has been checked end to end, including
>     terminating the output transformer with a 5K load where he read 300 volts P
>     to P across the secondary. When you hook it all back up, you get 10-20% mod
>     max. Voltages, components, all check good, she just won't modulate. Any
>     ideas?
>
>     Charlie, W4MEC in NC
>
>     ______________________________________________________________
>     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 mailto:AMRadio at mailman.qth.net
>     To unsubscribe, send an email to amradio-request at mailman.qth.net mailto: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
>     Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net
>


From sparky52 at cox.net  Sat May 15 15:29:52 2021
From: sparky52 at cox.net (sparky52 at cox.net)
Date: Sat, 15 May 2021 12:29:52 -0700 (PDT)
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <SJ0PR01MB6509B556347DBA2A14E722E4A02F9@SJ0PR01MB6509.prod.exchangelabs.com>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>,
	<1881537805.2166273.1621105769642@myemail.cox.net>
	<SJ0PR01MB6509B556347DBA2A14E722E4A02F9@SJ0PR01MB6509.prod.exchangelabs.com>
Message-ID: <201419992.2166560.1621106992874@myemail.cox.net>

Good Point Jim

John ac7xh


> On May 15, 2021 at 12:20 PM JAMES HANLON <knjhanlon at msn.com> wrote:
> 
>     While you're checking switches, make sure that the rotary switch in the rear is on the AM position.
> 
>     Jim, W8KGI
> 
> 
>     ---------------------------------------------
>     From: sparky52 at cox.net <sparky52 at cox.net>
>     Sent: Saturday, May 15, 2021 1:09 PM
>     To: w5jo at brightok.net <w5jo at brightok.net>; CL in NC <mjcal77 at yahoo.com>; amphone <amradio at mailman.qth.net>
>     Subject: Re: [AMRadio] Screwiest Elmac problem ever
>      
>     hello
> 
>     One more thing ,you might check the switch in the back that changes the type of mic ,from carbon to xtal may have been accidently thrown.
> 
>     john ac7xh
> 
>     > On May 15, 2021 at 8:30 AM w5jo at brightok.net mailto:w5jo at brightok.net mailto:w5jo at brightok.net wrote:
>     >
>     >
>     >     Hummmm! maybe a microphone, cord or connector for a start?
>     >
>     >     Jim
>     >     W5JO
>     >
>     >
>     >
>     >     -----Original Message-----
>     >
>     >
>     >     Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is
>     >     AF67 do something weird. He is a regular check in on the Old Friends group
>     >     that meets on 75 meter 3 times a week here in the Upstate SC area. It was
>     >     working just fine, then the mod fell off to a very low level. It does have
>     >     a new modulator interstage transformer from Hammond, which was installed
>     >     long prior to this problem, the rest original. He is getting 40 watts out
>     >     in CW and AM, the modulator has been checked end to end, including
>     >     terminating the output transformer with a 5K load where he read 300 volts P
>     >     to P across the secondary. When you hook it all back up, you get 10-20% mod
>     >     max. Voltages, components, all check good, she just won't modulate. Any
>     >     ideas?
>     >
>     >     Charlie, W4MEC in NC
>     >
>     >     ______________________________________________________________
>     >     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 mailto:AMRadio at mailman.qth.net
>     >     To unsubscribe, send an email to amradio-request at mailman.qth.net mailto:amradio-request at mailman.qth.net mailto: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 http://www.qsl.net/donate.html
>     >     Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net
>     >
> 
> 


From mjcal77 at yahoo.com  Sat May 15 20:58:42 2021
From: mjcal77 at yahoo.com (CL in NC)
Date: Sun, 16 May 2021 00:58:42 +0000 (UTC)
Subject: [AMRadio] Elmac no mod
References: <937992519.557034.1621126722926.ref@mail.yahoo.com>
Message-ID: <937992519.557034.1621126722926@mail.yahoo.com>

The switch in the back has been bypassed.  There is 300 volts P to P voice audio on the secondary of the modulation xfmr with a crystal mic on the input.  The TX loads properly to 40 watts out in CW or AM.  It is stone stock except for the Hammond modulator interstage xfmr and a zener for bias creation instead of a battery, and it was working 100% perfectly until a week ago when during the net, his mod went away.  Everything says it should be working, thus the screwiest problem ever moniker

Charlie 

From w5jo at brightok.net  Sat May 15 22:19:49 2021
From: w5jo at brightok.net (w5jo at brightok.net)
Date: Sat, 15 May 2021 21:19:49 -0500
Subject: [AMRadio] Elmac no mod
In-Reply-To: <937992519.557034.1621126722926@mail.yahoo.com>
References: <937992519.557034.1621126722926.ref@mail.yahoo.com>
	<937992519.557034.1621126722926@mail.yahoo.com>
Message-ID: <FBB270DD259A4590909472AC8879AB4F@JimPC>

Have you substituted tubes?  Even the finals?

Jim
W5JO


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


The switch in the back has been bypassed.  There is 300 volts P to P voice 
audio on the secondary of the modulation xfmr with a crystal mic on the 
input.  The TX loads properly to 40 watts out in CW or AM.  It is stone 
stock except for the Hammond modulator interstage xfmr and a zener for bias 
creation instead of a battery, and it was working 100% perfectly until a 
week ago when during the net, his mod went away.  Everything says it should 
be working, thus the screwiest problem ever moniker

Charlie


From sparky52 at cox.net  Sun May 16 00:00:14 2021
From: sparky52 at cox.net (sparky52 at cox.net)
Date: Sat, 15 May 2021 21:00:14 -0700 (PDT)
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <201419992.2166560.1621106992874@myemail.cox.net>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>,
	<1881537805.2166273.1621105769642@myemail.cox.net>
	<SJ0PR01MB6509B556347DBA2A14E722E4A02F9@SJ0PR01MB6509.prod.exchangelabs.com>
	<201419992.2166560.1621106992874@myemail.cox.net>
Message-ID: <718781645.2177198.1621137614827@myemail.cox.net>

Hello

Looking at the schematic here ,I'm not sure 300 v pk to pk is enough if you have 500 volts on the plates from the power supply and 220 vdc on the screens. 300 volts pk to pk is only around 110 volts rms The modulator should be able to put out 40 watts ,not going to get there with the pk to pk that low across a 5 k .

Don't know what kind of test equipment you have ,but if you can check the input output of v6 and v7 and then check the screen voltage on the v8 and v9 ,they were notorious for causing problems in the 5881 , once we get those readings then we can go from there. Anxious to see if you have 500 volts on the plates of 5881 .
If you have some spare tubes you can do what Jim suggested ,if not lets see what we can do to narrow the problem down. 300 volts pk to pk is not alot ,if you have 300 rms or avg then we have different ball game here,but I'm going on the 300v pk to pk in your previous email. Keep the faith the old girl will eventually get fixed ,just takes some time.

John ac7xh

> On May 15, 2021 at 12:29 PM sparky52 at cox.net mailto:sparky52 at cox.net wrote:
> 
> 
>     Good Point Jim
> 
>     John ac7xh
> 
>         > > On May 15, 2021 at 12:20 PM JAMES HANLON <knjhanlon at msn.com mailto:knjhanlon at msn.com > wrote:
> > 
> >         While you're checking switches, make sure that the rotary switch in the rear is on the AM position.
> > 
> >         Jim, W8KGI
> > 
> > 
> >         ---------------------------------------------
> >         From: sparky52 at cox.net mailto:sparky52 at cox.net <sparky52 at cox.net mailto:sparky52 at cox.net >
> >         Sent: Saturday, May 15, 2021 1:09 PM
> >         To: w5jo at brightok.net mailto:w5jo at brightok.net <w5jo at brightok.net mailto:w5jo at brightok.net >; CL in NC <mjcal77 at yahoo.com mailto:mjcal77 at yahoo.com >; amphone <amradio at mailman.qth.net mailto:amradio at mailman.qth.net >
> >         Subject: Re: [AMRadio] Screwiest Elmac problem ever
> > 
> >         hello
> > 
> >         One more thing ,you might check the switch in the back that changes the type of mic ,from carbon to xtal may have been accidently thrown.
> > 
> >         john ac7xh
> >         > On May 15, 2021 at 8:30 AM w5jo at brightok.net mailto:w5jo at brightok.net mailto:w5jo at brightok.net mailto:w5jo at brightok.net mailto:w5jo at brightok.net mailto:w5jo at brightok.net wrote:
> >         >
> >         > > Hummmm! maybe a microphone, cord or connector for a start?
> >         > > Jim > W5JO
> >         >
> >         >
> >         > > -----Original Message-----
> >         >
> >         > > Maybe a couple of you follow the Elmac emails, but Gary, K3OS has had is > AF67 do something weird. He is a regular check in on the Old Friends group > that meets on 75 meter 3 times a week here in the Upstate SC area. It was > working just fine, then the mod fell off to a very low level. It does have > a new modulator interstage transformer from Hammond, which was installed > long prior to this problem, the rest original. He is getting 40 watts out > in CW and AM, the modulator has been checked end to end, including > terminating the output transformer with a 5K load where he read 300 volts P > to P across the secondary. When you hook it all back up, you get 10-20% mod > max. Voltages, components, all check good, she just won't modulate. Any > ideas?
> >         > > Charlie, W4MEC in NC
> >         > > ______________________________________________________________ > 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 mailto:AMRadio at mailman.qth.net mailto:AMRadio at mailman.qth.net mailto:AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net mailto:amradio-request at mailman.qth.net mailto:amradio-request at mailman.qth.net mailto:amradio-request at mailman.qth.net mailto:amradio-request at mailman.qth.net mailto: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 http://www.qsl.net/donate.html > Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net mailto:sparky52 at cox.net mailto:sparky52 at cox.net
> >         >
> > 
> >     >     ______________________________________________________________
>     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 mailto:AMRadio at mailman.qth.net
>     To unsubscribe, send an email to amradio-request at mailman.qth.net mailto: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
>     Message delivered to sparky52 at cox.net mailto:sparky52 at cox.net
> 

From tonne at comcast.net  Sun May 16 13:56:36 2021
From: tonne at comcast.net (JimTonne)
Date: Sun, 16 May 2021 13:56:36 -0400
Subject: [AMRadio] Screwiest Elmac problem ever
In-Reply-To: <718781645.2177198.1621137614827@myemail.cox.net>
References: <2003638591.512437.1621091206323.ref@mail.yahoo.com>
	<2003638591.512437.1621091206323@mail.yahoo.com>
	<03392DA72EB84BD7ACB3E7D2EF0DCE28@JimPC>
	<1881537805.2166273.1621105769642@myemail.cox.net>
	<SJ0PR01MB6509B556347DBA2A14E722E4A02F9@SJ0PR01MB6509.prod.exchangelabs.com>
	<201419992.2166560.1621106992874@myemail.cox.net>
	<718781645.2177198.1621137614827@myemail.cox.net>
Message-ID: <4a66174f-3e9c-9936-3462-fc9fd5d4d8c8@comcast.net>

John and Jim et al:

With a 500 volt supply, 100% modulation would need 500 volts peak
( 1000 volts peak-to-peak ) out of the modulation transformer secondary.
You are about one-third of that, about 10 dB below the correct value.
I'd place money that the transformer has shorted turns if the drive to
the modulator tubes is correct.

- Jim Tonne?? W4ENE



On 5/16/2021 12:00 AM, sparky52 at cox.net wrote:
> Hello
>
> Looking at the schematic here ,I'm not sure 300 v pk to pk is enough if you have 500 volts on the plates from the power supply and 220 vdc on the screens. 300 volts pk to pk is only around 110 volts rms The modulator should be able to put out 40 watts ,not going to get there with the pk to pk that low across a 5 k .
>
> Don't know what kind of test equipment you have ,but if you can check the input output of v6 and v7 and then check the screen voltage on the v8 and v9 ,they were notorious for causing problems in the 5881 , once we get those readings then we can go from there. Anxious to see if you have 500 volts on the plates of 5881 .
> If you have some spare tubes you can do what Jim suggested ,if not lets see what we can do to narrow the problem down. 300 volts pk to pk is not alot ,if you have 300 rms or avg then we have different ball game here,but I'm going on the 300v pk to pk in your previous email. Keep the faith the old girl will eventually get fixed ,just takes some time.
>
> John ac7xh


From mjcal77 at yahoo.com  Mon May 24 17:59:14 2021
From: mjcal77 at yahoo.com (CL in NC)
Date: Mon, 24 May 2021 21:59:14 +0000 (UTC)
Subject: [AMRadio] Good info here
References: <1265554415.2016719.1621893554476.ref@mail.yahoo.com>
Message-ID: <1265554415.2016719.1621893554476@mail.yahoo.com>

I received some very helpful info on the Elmac mod problem, forwarded those emails to Gary, and from that info he determined that in fact his mod transformer was bad.  He installed a Ranger mod xfmr he had, and the AF67 is back in full mod, plus he has a line on a NOS Elmac xfmr.  So, thanks for the guiding light, good info can be found on this site without the static.

Charlie, W4MEC in NC

