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Old 27th March 2011, 09:49 AM   #1
Green77 is offline Green77  Sweden
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Default High bias - TubelabSE

Hi all.

Just finished my TubelabSE. Played a lot of music yeasterday
But i notice that my bias from PSU is very high..
After R6 i have 260 V (should be around 150 V). What could be the problem you think? Does it matter? I still adjust the 300b tubes to 70 mA (-68 V at grid)..

Many thanks //Daniel
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Old 27th March 2011, 11:46 AM   #2
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Quote:
Originally Posted by Green77 View Post
(should be around 150 V)
That's for 45 tube. For 300B, what you have for B- voltage is normal.
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Old 27th March 2011, 12:02 PM   #3
Green77 is offline Green77  Sweden
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