Russ, Here is another company that has several models of bi-metal TEMPCO type switches. Including some very small ones in either a dip (6600 series) or TO-220 style (6700 series).
[1]http://www.airpax.net/site/sensing/bimetal/index.html To make Mark happy, if you google various combinations including "solid state" you will see some listings for solid state items but I have not checked them. I probably would not go overboard in trying to retro-fit with some solid state overkill because I don't think it will achieve good enough results. Besides it would not be a proper restoration at that point. Bill....WB6BNQ WB6BNQ wrote: 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][2]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][3]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 -- [email protected] To unsubscribe, go to [3][4]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. [5]http://www.tempco.com/ 2. [6]http://www.tempco.com/Intro2008small.pdf 3. [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to [8]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. http://www.airpax.net/site/sensing/bimetal/index.html 2. http://www.tempco.com/ 3. http://www.tempco.com/Intro2008small.pdf 4. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 5. http://www.tempco.com/ 6. http://www.tempco.com/Intro2008small.pdf 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ 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.
