IC-746 higher power mod
For all those who wants a little more of driving power for
an old amp with the new IC-746,here is the way to do it
easily.
Important settings pots within the IC-746 HF/VHF radio.
Remove the twelve screws holding on the bottom cover. With
the Radio laying flat on it’s top remove the bottom cover.
Underneath the radio there is a board named MAIN UNIT
(B5083J) where there are 4 important small pots provided
to increase or decrease the power output in different
bands as follow:
R-989 HF Power output (rated at 100W)
R-991 50 Mhz band Power Output (rated at 100W)
R-993 144Mhz band Power Output (rated at 100W)
R-994 AM Power output (rated at 40W)
R-546 Tx gain,set at factory for best linearity in TX IF
(better not to play with it)