SB-101

[Brian Carling]

On  1 Oct 97 at 16:18, Erik wrote:

> I have developed feedback in my AF circuit.

Eric, I suggest that you move your mouth away from your ears!!

Just kidding. Seriously though, you probably have a microphonic tube.
It could be either of the tubes in the a.f. chain after the detector.

Best way to check is to swap them out! OR you could try disconnecting
the path one stage at a time until you see where it stops.

Power output a.f. tubes can cause this. I have seen it with 6V6 and
6L6 tubes, anyway!

Bry
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*** 73 from Radio AF4K/G3XLQ Gaithersburg, MD USA  *
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AM International #1024, TENTEN #13582. GRID FM19. Using a SWAN 250 on 6m,
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HTX-202...TEN-TEN #13582, DXCC #17,763 Bicentennial WAS

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