[R-390] agc repair

[Bob Camp]

Hi

With "no agc voltage at all" (I assume that means zero volts) I sure=20
would check the resistance of the AGC line to ground. It sounds like a=20=

short in one of the bypass cap's or cables. Assuming you find a short=20
at the back panel TB102 then unplug the modules one by one. Either the=20=

short will go away when one of the modules is unplugged or the short is=20=

in the main wiring harness. If it's in the harness check the normal=20
pinch points.
=09
	Hope that helps.

		Bob Camp
		KB8TQ



On Apr 11, 2004, at 3:14 PM, Gene Dathe wrote:

> The Agc on my 390-A doesn't work.  Substituted V506, V508 and V509=20
> with new tubes, no help.  No agc voltage appears at TB102 3 and 4. =20
> Any thoughts on where to start?
>
> Thanks, Gene  NA=D8G
>
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