My amp is an oscillator !
Posted: Mon Jun 24, 2013 10:22 am
I have just completed a 80 watt valve amplifier.
I found the amp oscillates at half volume. Either side it is fine.
So I took out the phase splitter valve and the oscillation is still there in the first 2 gain stages.
I have tried extra decoupling but that made no difference.
Removing the bypass capacitors stops the oscillation but the gain is then too small.
I found the amp oscillates at half volume. Either side it is fine.
So I took out the phase splitter valve and the oscillation is still there in the first 2 gain stages.
I have tried extra decoupling but that made no difference.
Removing the bypass capacitors stops the oscillation but the gain is then too small.