Took a look at Heath's HW-16 design. Quite ingenious: Using the PA cathode bypass capacitors and current through a diode to shunt the receiver front end during transmit. Early diode QSK operation. And a neon bulb relaxation oscillator, using grid block keying voltage, for CW sidetone.
I enjoy putting vintage stuff on the air for SKN. Heath did not integrating their separates well back in the day, relying on 110V antenna relays. I may have some DX-60A/HG-10B/HR-1680/HS-1681 ideas for next year! John KN5L ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
