Geoff, I think you missed my point. I already have racks and racks full of homebrew rigs, pair of 813,s with various modulators, push pull 812A rig modulated by 811A's, plenty of parts to build a pair of 4-125 rf deck, etc, but what I want to build is a SMALL tabletop transceiver, both the receiver and transmitter in one small cabinet like dx100 size or thereabouts.
The receiver and transmitter will be homebrew and in the same cabinet... Brett N2DTS > > > > > What would you build/want as a 40 meter hi fi AM transceiver? > > I want to limit the power to the 200 watt and under class, but > > can put the high voltage power supply in a separate > cabinet/rack, and > > sit the transceiver on the operating desk, to save space and weight, > > or, run one 4d32 at 100 watts with everything inside one box. > > With a separate power supply, I could likely go to 200 watts > > out of 2 4D32 tubes, or something different? > > How about a single 813 modulated by 4 811's, in push-pull parallel? > > As long as the mod iron was big enough, or you had a (20Hy@ 300mA) > choke to use as a reactor. > > Put it in a 6'tall rack, and you'd have plenty of room for some sort > of low powered exciter. You could even enhance the audio from the > exciter by replacing the driver transformer with a > solid-state audio driving > device (see http://www.qsl.net/wa5bxo/driver1.html). > > PLL circuits are abound for frequency stabilization. The > whole exciter > could be made onto one circuit board. You would however, be required > to use enough RF power to drive the 813, but that shouldn't be hard. > > Just some thoughts. > > It's ironic that this thread is going on - I've got the B&W > tuning cap, > jack-bar, > 40m plug-in coil, and a chassis... I'm looking to start > building a 40m final > using a single 450TL (simply because I have 3, and would like > to see 1 modulated > by 2) and the filament transformers. The idea of a microwave > oven door is > intriguing. > > Ok - lots of thoughts... good luck with your projects. > > 73 = Best Regards, > -Geoff/W5OMR > > > _______________________________________________ > AMRadio mailing list > [email protected] > http://mailman.qth.net/mailman/listinfo/amradio
