Today I have seen a video of a FT-980 PA repair with the Q01 mod, taking collector voltage from the TX13.5V. So it seems to be factory made. In my rig the lacker on the screws seemed original. So I guess it is original, even if it is not documented. Q01 had no screw either.
Damaged was a tantalum capacitor in Q01 collector blasted. Another one in 13.5V for driver's changed too. Most of other capacitors are in base bias line carrying 0,7V, so in the video were left unchanged. I guess because some were not easy to change (cut and weld from top) and removing the whole board was out of scope.
Waiting for a PS to test PA TX13.5V behaviour.
73 EA1FC
