Any suggestions? Thinking in terms of maybe 10W out / 200mW in or
thereabouts.

Paul-

Kenwood may have made a 2400 MHz version of the TM-742, except it was equipped
with only the one band module. I recall seeing a photo on a web site, but have
not been able to find any additional information, so it may have only been a
proposed product that was never produced.

If such a rig was actually produced, then you should be able to obtain one of
the 2400 MHz amplifier modules as a replacement part.

Last year I replaced the Two Meter "SAV17" Fifty Watt module in my TM-742. It
was obtained from RF Parts Company, http://www.rfparts.com/. Their catalog
lists other similar modules for other frequency ranges, but none listed in
their catalog are higher than 1300 MHz.

Four companies were mentioned as producing such modules, so researching their
web sites might turn up what you are looking for. They are Motorola,
Mitsubishi Electric, Philips and Toshiba.

73, Fred, K4DII