WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Hi,
I have a Chinese amp (yaqin ms-20l) that has recently developed a slight 120 Hz hum in the right channel. What would be the likely source of the noise?