Hello,
I have a Ampeg VT120 Head and on the back there are points to put in a multimeter to set the bias (via a bias adj screw). I see on the schematics that it says to set the bias at 0.1 volts. Now I assume that is DC but since there are 4 power tubes I want to know, is this an average? It then goes on to state a setting of 0.02 volts. Which one is right and what type of bias reading is this giving me?
I have a Ampeg VT120 Head and on the back there are points to put in a multimeter to set the bias (via a bias adj screw). I see on the schematics that it says to set the bias at 0.1 volts. Now I assume that is DC but since there are 4 power tubes I want to know, is this an average? It then goes on to state a setting of 0.02 volts. Which one is right and what type of bias reading is this giving me?
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