[Collins] KWM2

[Gary Garrison]

I have a KWM2 that I received recently and for some reason when the AF gain is turned up past the second mark on the dial it starts to squeal. The further you go the louder it gets. I removed the tube prior to the audio output tube and it still does it so I know its coming from the audio amp tube. I tested the tube and it seems to check good with my Hickok tester. I don't have a tube to replace it with but I will as soon as I can get one (6EB8). Any ideas would be appreciated. Also the voltage readings on the tube are close to what they should be.

Thanks
Gary K4TKX


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