Group, Jim Garland on the boatanch...@theporch.com list asked about crystals: "A 22.5MHz crystal (HC-5 case) in my homebrew receiver, built about forty years ago, no longer oscillates. It seems to be purely an age-related problem. It is in a standard solid state circuit which bandswitches six crystals, and the other five work just fine. I wonder what causes a crystal to stop working, and whether it is possible to repair them? I've "repaired" dead 100kHz calibrator crystals, and hamband crystals in FT-243 cases, by cleaning off the brass pressure plates, but am not sure if one can do this on thin high crystals. As I recall, the metal electrodes are evaporated onto the sides of the element. 73, Jim W8ZR"
One of the replies was: "Broken families, drugs, drink... the normal, I suppose. John K5MO" Scott Robinson asked: "Receiver crystals aren't getting beaten up by high power, but something has killed a lot of them in my R-390A and Drake R-4A. Curiously yours, Scott" And Roy Morgan asked: "I have a 1960's frequency standard from a Nike site: the Sulzer Oscillator and would like to find tech into on it." Any help appreciated. Bill Hawkins _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
