Hi everybody,
I would like my Kt88pp change to fixed bias, is it R21 and R19 change to 2k ohm 5w potentiometer?
Please help~~^.^ Thank you very much~~
KT88 PP fixed bias
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KT88 PP fixed bias
by kuchen » Wed Apr 15, 2015 9:39 am
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Re: KT88 PP fixed bias
by azazello » Wed Apr 15, 2015 12:40 pm
For fixed bias You need minus U about 40-50 v connected to two grid resistors of KT88 /grid res-s 470 kohm disconnect from ground and connect to minus U cross adjusting trimmer resistors about 20-50 kohm and adjust plate currents the sames, that was in autobias mode/. Your power transformer must have about 50 VAC/.
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Re: KT88 PP fixed bias
by Geek » Wed Apr 15, 2015 9:09 pm
Those 3300uF after the regulators, get rid of them. Let the reg's do their job 
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
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Geek - KT88
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