> They also don't like to be plate modulated without a mod transformer > with screen windings, hard to find.
nah - those ol' (as Don/K4KYV calls 'em) Liberty Ship 500w mod xfrmrs that are 1:1 w/5500ohms are plentiful, and they have screen windings. > They make great modulators, if you don't mind forced air blowers. > 300 watts out at 1000 volts, 600 watts at 2000 volts. > > I have bunch as spares for my mod deck, but think I > will go with something else... You know, there are IC's that you can build a complete receiver around. A couple of caps, a tuning condensor and digital frequency readout... A PLL chip with a 555 timer and a variable cap could be a good VFO, with a momentary contact push-button for spotting.. Solid State devices like the 2SC2879 would work as well, in the final. (4) of those would make for a clean 250w of AM, with enough room to modulate 100%. You'd just need a hefty heat-sink. 73 = Best Regards, -Geoff/W5OMR
