Re: Bitx40 from Chile
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Agree with Jerry abt 'abt parasitic oscillation in the IRF510 while in RX mode'
Coz drain & source never gets disconnected here even in RX BITX, unlike other RF Power BJT design...
parasitic oscillation can also trigger if gate is dry solder or short in transformer...
Crosscheq with DVM if Drain & Source of IRF have become short...
( keep one finger on - 0 V ground & other finger on gate while testing )
'Repair & Reuse or Recycle E-Waste'
On Mar 1, 2017 11:38 PM, "Jerry Gaffke via Groups.Io" <email@example.com> wrote: