Hello Russ, Well, depending upon the size requirement of the thermal switch, I would consider trying to retro-fit. One company that makes such things is TEMPCO [ [1]http://www.tempco.com ]. They have several different kinds and even one model that is adjustable. There is a nice pictorial short-form PDF catalog that gives a clear picture of their temperature switches. Here is the URL for that : [2]http://www.tempco.com/Intro2008small.pdf See the 31st page.
No doubt there are other manufacturers but this is the only one that comes to mind at the moment. As for #1 or #2 questions, I would think of those as a last ditch effort. Bill....WB6BNQ [EMAIL PROTECTED] wrote: I am in the last stage of restoring a 1964 General Radio Frequency Standard Model 1120-AB. I'm having trouble getting the inner oven to work propoerly and the problem has been traced to a defective thermostat in the inner oven. In checking, the thermostat is a thermoswitch manufactured by Princo and is no longer available. My options appear to be: 1. locate a working GR Standard Frequency Oscillator (1113-A) and replace the entire chassis. 2. locate a non-working GR Frequency Oscillator and part it out as needed 3. find a suitable replacement for the original thermoswitch (78 C - closes circuit when temperature is reached) I was wondering if anyone on this list has any sources or leads for #1 and #2 and any opinions on a source for #3. Thanks Russ WA3FRP _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to [3]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. http://www.tempco.com/ 2. http://www.tempco.com/Intro2008small.pdf 3. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ 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.