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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: GE 6CA7 - Can't bias tube low enough posted by Capt. Z on April 13, 2007 at 06:57:43:
Too much bias current can speed up the wear on the tube. But the current may still be okay as far as the tube goes, just not okay with your amp. And it does sound like you are close to the proper bias so it's probably not a big deal.The line voltage will likely have an effect - but what that effect is remains to be seen. In general higher line voltages mean more negative voltage is needed for bias. What the secondary voltages are to the bias winding and the B+ winding will be is dependent on a lot of factors - AC volts at the wall, the trafo output voltage with the lower voltage primary, etc.
And I'm with you - I'd try my best to keep those in the amp too!!
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Follow Ups
- Re: GE 6CA7 - Can't bias tube low enough - Jim McShane 08:31:58 04/13/07 (1)
- Re: GE 6CA7 - Can't bias tube low enough - Capt. Z 09:05:40 04/13/07 (0)
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