"Uwe Surojegin" wrote:

Hello Folks,
I'm servicing an Acram Alpha 3 amplifier. The amp gives clear and nice sound
up to a volume of around 11 o'clock on the volume potentiometer. Above 12
o'clock the amplifier gives a "bad" distortion on both channels.
Has anyone an idea what that that could be?

The problem could be caused by oscillation. Have you checked the
amp with a o'scope?

Norbert