Every amp builder was feeling heat back then, band switches showed up in an attempt to make them look legit, call them six or 15 meters amps, and include a paper showing how to move the tap on a coil or the little sticker that said "export only".
The JB 12 was a receive amp, untill you moved a couple wires around.
Palomar built some solid state amps that had actual band pass filtering and real band switching but that did not last long.
Texas Star got a sweet deal with the CW transmitter thing, the specifications said <5 watts on 28 mhz out of 4 2879s and no one blinked.
73
Jeff
The JB 12 was a receive amp, untill you moved a couple wires around.
Palomar built some solid state amps that had actual band pass filtering and real band switching but that did not last long.
Texas Star got a sweet deal with the CW transmitter thing, the specifications said <5 watts on 28 mhz out of 4 2879s and no one blinked.
73
Jeff