Tube Amp Archive

Just a quicky- had a similar thing with a Selmar combo. persisting hum, after renewing caps, output valves and rectifier. There had been a nasty fault which I won`t go into - so it was good to replace these anyway. Everything seemed to be in order. However, the earth busbar struck me as possibly car...

Hi folks - how is this for a hum cure? I was playing electric violin in a pub with a dodgy earth - but I noticed that every time I touched the jack plug body, the hum vanished. No time to work out why -and could not do anything whilst playing, of course. Fortunately, I had some spare cable, so I str...