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-   -   Bias Voltage (http://www.diyaudio.com/forums/tubes-valves/140549-bias-voltage.html)

AmpBuilder225 16th March 2009 02:28 PM

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

Poindexter 16th March 2009 04:27 PM

Just in order to keep this simple, what output tube are you using, and what voltage (plate to cathode) is it operating at?

Aloha,

Poinz
AudioTropic

AmpBuilder225 16th March 2009 04:42 PM

They're EL34's with 480V on the plate

Poindexter 17th March 2009 03:06 AM

Mullard & Co. say about -42Vdc.

Aloha,

Poinz
AudioTropic

AmpBuilder225 17th March 2009 11:27 AM

Thank You, That would make sense :)


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