I am in the early stage of writing a history of the General Radio model 275 crystal (piezoelectric) oscillator. I have one complete 275, and parts to a second. The 275 was the first commercially available crystal oscillator. I hope to restore both 275s to operation. The paper will also cover the model 375 station monitor which followed the 275 and used the same oscillator. I have most of a 375, which I will soon begin restoration. I am interested in any pieces of hardware, including models 276 and 376 Quartz Plates, and any documentation (or copies thereof) including the relevant portions of the General Radio E and F catalogs.
Sincerely, John WA4WDL John M. Franke 1500 Ibis Ct. Portsmouth, VA 23703 757 465 1204 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
