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Re: Bias a Marshall 2204

3/2/2000 5:51 PM
PTJohn	Re: Bias a Marshall 2204 There is the time-tested method of putting a 1 ohm resistor in between the cathode of the power tube and ground. This is the principle behind the "bias probe." I built one, and it works great. As far as correct current, that depends on your plate voltage. You could also put the amp into a load, crank it up clean, and use an oscilloscope to notch out the crossover distortion. And, there's always "by ear", but be VERY careful.

3/2/2000 5:51 PM

PTJohn

Re: Bias a Marshall 2204

There is the time-tested method of putting a 1 ohm resistor in between the cathode of the power tube and ground. This is the principle behind the "bias probe." I built one, and it works great. As far as correct current, that depends on your plate voltage.
You could also put the amp into a load, crank it up clean, and use an oscilloscope to notch out the crossover distortion.
And, there's always "by ear", but be VERY careful.

Replies:

Liam q{You could also put the amp into a... -- 3/2/2000 6:08 PM