I have one interesting finding. It seems that changing the PA_BIAS1 setting does not modify the current consumed by sBitx.
After pressing PTT It increases from 0.31A to 0.77A, and does not depend on further changes in the potentiometer setting.
The voltage on L80 and on L81 does not increase significantly when I push PTT in the USB mode (or press the key in the CW mode).
The voltage on the input of the potentiometer (node between R77 and D6) is correct.
Namely, the potentiometer is faulty or improperly soldered...
?
