Jeff Rowland Model 7 mk2 bias adjustement - diyAudio
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Old 2nd September 2011, 10:46 PM   #1
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Default Jeff Rowland Model 7 mk2 bias adjustement

Hello all,
I've got the Jeff Rowland Model 7 Power amp and because of one of them are a bit warmer than the other, I would like to control the bias ... Does anyone have informations about the method to do that ?
For information there is a screw on each of them where "bias adj" is writing but I don't know the factory Voltage "measures"/"data" and where/how I have to take it.
Please excuse my bad english ... I'm french

Many thanks for your help.
Regards,
Sly

N.B : My model 7 are the "B" version, I suppose that mean MK2 version ... (with XLR inputs)
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Old 6th September 2011, 01:31 PM   #2
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75-85mV measured across the 1ohm collector resistors after an hour of warm-up
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