• 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.

fixed bias for push pull tube amps


2007-05-04 2:54 am
i am designing a power supply for a typical 20watt 6v6 push pull amp for guitar.

with the fixed bias supply how much current roughly should it give?

basically by my understanding it is applying a negative voltage to the grids of the power tubes pushing them into their active region.

now for something in the vicinity of -50v bias supply for a 2 6v6's roughly idling at 15mA this bias supply would barely have to push out a milliamp considering the high impedance of a tube yeah?