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Old 16th March 2009, 02:28 PM   #1
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Default Bias Voltage

Hi, I suspect this is a trivial point, but I have the bias current required for each power valve in my amp of 36.5mA and I am not sure how to work out the bias voltage from this to enable me to pick potentiometers. Could anybody advise me here?
Thanks
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Old 16th March 2009, 04:27 PM   #2
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Just in order to keep this simple, what output tube are you using, and what voltage (plate to cathode) is it operating at?

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Poinz
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Old 16th March 2009, 04:42 PM   #3
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They're EL34's with 480V on the plate
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Old 17th March 2009, 03:06 AM   #4
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Mullard & Co. say about -42Vdc.

Aloha,

Poinz
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Old 17th March 2009, 11:27 AM   #5
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Thank You, That would make sense
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