guitar amp oscillation
Hi,
I've just about finished building a guitar amp, and im having strange problems with the power amp circuit.
everything works fine, it amplifies the signal, and sounds good, but the amp is drawing more current from the positive rail than it is from the negative. after a few minutes it starts drawing excessive current from the postive supply and the negative stays normal.
the funny thing is, it was working fine the other day, and i cant remember changing anything, then it starting doing this. with zero input signal the safety resistor ive installed on the positive supply is showing 15mA through it which rises with time, and the negative supply is sitting at 6mA.
i have replaced all the components, and it is still doing the weird thing.
any ideas?
Thanks heaps,
Sam