Bad capacitor in the audio stage?
Jeff
At 09:39 AM 11/25/2004, you wrote:
>Hi group!
>I have a vhf pll exciter that is very noisy, by that I mean scratchy
>sounds on the carrier. When I unplug the PA and run the exciter
>alone with no audio into a dummy load I get this noise, so I know it
>is coming from
>the exciter. I cleaned all the contacts that the audio and bandpass
>boards plug into and also the edge connecter plug, ICOM etc. Touched
>all posts with a touch of new solder, but still have it.
>I even swapped audio and bandpass boards to no avail. So I replaced
>it with another exciter, and this one is a
>lot quieter. What would cause this exciter to generate noise? I
>modified the Band Pass Filter from G2 to a G1 and replaced the
>aluminum slug with a ferrite one. I would like to fix this one if I
>can as they are hard to come by. Is there any suggestions where I
>should start looking? Has anyone else had this problem? Thanks in
>advance.
>
>Jim KM�K
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>Yahoo! Groups Links
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