Aiprax (http:www.airpaxtsp.com/tspsite/6700.html) is a very nice thermo switch. Web site explains all about it. Been using them for years. The size of a T0-220 case, handles 1 amp although I prefer driving a fan relay then I can switch anything. Operating temps start out at 40 deg C and work up to 130 deg C in 5 deg steps. Purchase the temp you want. I use P/N 67F040 (40 deg C). The "F" stands for fan or normally open and the "L" is normally closed. Stocked at Sager Electronics 508 947-8888. Sager #AIT67F040. Cost $6.85. I ordered mine thru Inagitron Sales, Langhorn, Pa 215 250-7778. Drill one 4/40 hole in heatsink and install with some temp grease. Airpax makes a lot of different temp control devices. 73, Gary K2UQ [EMAIL PROTECTED]
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