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President Jackson correct bias value .

Posted: Wednesday 17th Aug 2011, 2:41
by mr.alex
Hallo at all..

I have a RTX president jackson 1st version..

someone can tell me the correct range value
for the bias current on 2sc2166 and MRF477 ??? :?

When i have change the curren on 2SC2166 from 12ma to 40ma,
the transistor is dead. :doh:

I have the service manual and it says :
MRF477 trimmer VR9 80ma.
2SC2166 trimmer VR10 50ma .

May you tell me also the correct bias for this 3 conditions, please ?! :(
2sc2166 + MRF477, and
2SC2166 + 2SC1969 or
2SC1969 + 2SC1969 .

Please HELP Me !! thanks a lot .. :cry:
Regards
Alex (italy)