Re: RD16HHF1 in the uBITX #ubitx

MVS Sarma
 

Rlacement of MOSfets alone can't not solve the case.

 However there is reasonable improvement,. Interestingly, there is a dip in gain at 21.2MHz and recovered at 28 MHz. Twe need to analyse this behaviour. I wonder what would happen if we can tweak C261 and C262  by lowering their values , say 68nF instead of 100nF !!  ??
If R97 and R98 could be increased to say 100 ohms, the gate loading would reduce, I agree that, we  need to ensure thast amplifier would not become unstable.

regards
 sarma
 vu3zmv

 

Join BITX20@groups.io to automatically receive all group messages.