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.

Reply via email to