[Swan] Swan 350 & 500cx AGC Problem

[Ken, WA2LBI]

Don,

I have a 500cx that reacts in the same manner. I also believe it is an AGC/ALC
issue but have been unable to locate/correct it. I had recapped and changed a
number of resistors in this rig a while ago and that corrected the ALC problem
(my xmit audio was distorting on peaks). It would be helpful if the schematic
had expected voltages printed at various points to allow for comparison.

Has anybody come across a similar problem in the 500cx (or 350) and found a
remedy?

Thanks,

Ken, WA2LBI
wa2lbi@arrl.net

Quoting Don Flenner <w4ych@earthlink.net>:

> Greetings All,
>
> I picked up a 350 a couple months ago and have a question concerning audio
> distortion on strong signals. The receiver is very hot, maybe to hot. I
> would think that the problem is in the AVC/AGC circuit but I can see
> anything wrong and resistance checks seem to be in the ball park. I have
> noticed that when I back down the RF gain control the audio quality is
> better. I was told that the AGC system is kind of unique, true or false?
>
> The rig is in very nice cosmetic condition and I have re-capped the power
> supply. It would be a keeper if I can get the audio squared away....
>
> Any thoughts and guidance would be appreciated.
>
> 73,
> Don, W4YCH
> http://www.qsl.net/w4ych
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