Re: uBitX reduced power option
Jack Brabham - KZ5A
RV1 is useful to reduce power which is already low above 40M. Good feature if you would prefer a 1 watt rig. Increasing power boils down to running higher Vcc on the PA and upgrading the PA cooling.
I am building a V5 with front panel variable PA voltage, I expect to have to interconnect the variable Vcc with the PA bias circuit so that it tracks as required.
Getting rid of the power fall off above 40 involves replacing most of the transistors in the TX chain, all of which have reduced gain at higher frequencies (20M and above). I really wish Farhan would raise the price a few bucks and put decent transistors in it in the first place.
73 Jack KZ5A
On 7/13/2019 3:59 PM, N8DAH wrote: