Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Oddvar on November 21, 2016, 07:46:50 am

Title: Marshall 2204 COM Bias test
Post by: Oddvar on November 21, 2016, 07:46:50 am

Hi again,

Is the COM Bias test on the picture a special connector?

Title: Re: Marshall 2204 COM Bias test
Post by: sluckey on November 21, 2016, 07:58:05 am

Quote from: Oddvar on November 21, 2016, 07:46:50 am

Is the COM Bias test on the picture a special connector?

Nothing special about it. It's just a pin jack just like the two red pin jacks. The black COM jack connects to chassis ground, AKA common or COM.