[AMRadio] Screwiest Elmac problem ever

[sparky52 at 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
>     >
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