Hi The posistor approach to heating a crystal was originally pioneered in Russia. Morion was building vacuum insulated / PTC controlled OCXO’s long before the PTC parts started showing up more generally in the 1970’s.
Bob > On Jun 5, 2017, at 4:35 AM, Ulf Kylenfall via time-nuts <time-nuts@febo.com> > wrote: > > The Crystal heater clip wasa Murata "Posistor" soldered onto a clipand they > were marketed by Murata. > I once purchased a small amount of theseand used them as "poor man's ovens". > Although not perfect by far, they did theirjob and kept my UHF gear stable. > Murata dropped that product many yearsago and I have not been able to findany > similar product. The Posistors arelisted by eg. Digi-key but they do not > stock them. > Ulf - SM6GXV > > _______________________________________________ > 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. _______________________________________________ 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.
