Hi Bill, The Tempco units look great. My original Google search came up with similar Fenwal units that are a bit larger sizewise. The size of the Tempco units appears to be a fit into the space reserved for the original thermoswitch.
Thanks for the assist! 73 Russ WA3FRP -----Original Message----- From: WB6BNQ <[EMAIL PROTECTED]> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Tue, 19 Aug 2008 2:06 pm Subject: Re: [time-nuts] Restoring GR 1120-AB Frequency Standard - Needassist... Russ, Here is the actual catalog PDF page [1]http://www.tempco.com/Catalog/Section%2013-pdf/Surface_Mount_Thermos tats.pdf Their site sucks for navigation and is very unclear, at first blush, on how to get to the meat. But I finally did find it. The above link has all the data on the variable model and the one I was thinking of (second item) which is the surface mount model. Bill....WB6BNQ Bill 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 -- time-nuts@febo.com 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 -- time-nuts@febo.com To unsubscribe, go to [8]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. http://www.tempco.com/Catalog/Section%2013-pdf/Surface_Mount_Thermostats.pdf 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 -- 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.