brainwagon

Roger, G3XBM has a terrific blog and website, and is always tinkering things together that I find interesting and inspiring. This morning, I see that he’s got a small 2 transistor transceiver for 80m that looks like it could be really fun, and constructed from bits you’d probably find in your junkbox. I like the circuit a bit more than the Pixie, since it doesn’t use an LM386, but that does mean that you need a high-impedance earphone because the audio power developed on receive is pretty low. On transmit, it’s basically a simple crystal oscillator, tapped on the collector. I’m a bit hazy on exactly how it operates on receive though. Of course, that means that there is an opportunity for thinking and experimentation with LTSpice. Very nifty. I might have to breadboard this one up myself.

XBM80-2 An Experimental 80m CW Transceiver G3XBM.