[bill knox]

Hi all

I finally found out what the problem is with the audio amplifier that I built.

It is the output transformer radiating back into the amplifier, I have managed to remove most of the oscillation by fitting a 10nF capacitor across the primary winding, there is still a slight oscillation but nowhere near what was there before, as the oscillation was at quite a high frequency I thought maybe even a lower capacity capacitor.

Any views please

Bill