there's actually not that much to it.
these radios are primed to be loud and only need a few adjustments to get there.
the MOSFET versions have already had the parts upgrades done at the factory, so no need to replace the 2SB754, its already been done!
the first thing to do is make sure the transmitter coils are peaked for max PEP wattage.
turn the RF power control all the way up, and on channel 20, AM
mode, mic gain all the way up; adjust L40, L42, L43, and L44 for max watts while saying "ahhh" into the mic.
(the one i had didnt need any adjustments, as they were already peaked. your mileage may vary)
now make sure the power is somewhat equal on channels 1 and 40.
if not, use L40 and L42 to balance it.
now set VR14 for about a 5 watt deadkey. (yes, you can do more, but why? no one will notice and it will just heat the radio up more.)
turn the RF power knob all the way down and set VR18 for 1 or 2 watts. whatever you like.
now turn VR16 (AMC) all the way up.
you can set VR13 (SSB
ALC) for about 15 watts if you want, but there really is no need.
the only "mod" i would suggest, and you might not even need to do it, would be to add a silicon rectifier diode (1n4001 etc...) to R264.
this is what is commonly called the "swing mod."
R264 is right near VR14.
lift the leg of R264 that is closest to T1 and insert the banded end of the diode in the now empty hole.
solder the other end of the diode to the loose leg of R264.
you should have a very loud radio after performing these steps.