Re: RD16HHF1 in the uBITX #ubitx

Jerry Gaffke
 

Indeed, there is the PA+ supply voltage on the IRF510 drains during receive.
But zero drain current because the IRF510 gate voltage is zero
and nowhere else for the PA+ supply to go.  Not so much as a bias or feedback resistor.

So those IRF510 FET's are already doing the job of the extra FET that you had proposed.

Jerry


On Thu, Feb 15, 2018 at 05:40 pm, Arv Evans wrote:
But that does not remove DC from the finals.  I did not notice that the bias was dumped during receive.  That is my error.  
 

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