High bias - TubelabSE

Green77 · 27th March 2011, 09:49 AM

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

Evenharmonics · 27th March 2011, 11:46 AM

Quote:

Originally Posted by Green77

(should be around 150 V)

That's for 45 tube. For 300B, what you have for B- voltage is normal.

Green77 · 27th March 2011, 12:02 PM

Thanks

27th March 2011, 09:49 AM	#1
Green77 diyAudio Member Join Date: May 2007 Location: MJOLBY	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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27th March 2011, 12:02 PM	#3
Green77 diyAudio Member Join Date: May 2007 Location: MJOLBY	Thanks

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