Re: Asking for help solving a Hendricks kit BitX20 PA oscillation problem


I replaced both BS170’s and solved the bias current problem.   I re-soldered both T1 & T2.   That may have been a contributor.  I ended up using a 470 ohm resistor across their drains instead of the 1k resistor.  Now all is very very stable.    Currently trying to do a final alignment.  Hoping that will fix my power output problem which is currently limited to about 4.2 Watts.

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