For the fan application, you can purchase from digikey http://www.digikey.com/ over the web or landline a CANTHERM bimetal temp normally open switch which will close when the temp reaches the desired setpoint. Has spade lugs for connection. Remember to apply a dab of heat sink grease when mounting. They are in the $8-10 range. Note they are rated in degrees C, so you'll have to convert to degrees F to pick the right one!!! Heres a link to a java script: http://www.nomoreodor.com/celsius_to_fahrenheit_conversion.htm The part number will be 317-109X-ND, where X selects the temperature. The one I picked was 104 degreeF range if I remember right. Take into account the ambient temp range of the installation you are in when selecting the setpoint temp. A setpoint too low would keep the fan on all the time in an uncooled repeater shack in Phoenix AZ.
73's Ralph W4XE -----Original Message----- From: kc4wgh [mailto:[EMAIL PROTECTED] Sent: Friday, April 08, 2005 11:07 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Fan Temp Switch Back again. Any suggested on a vendor for a temperature switch to turn the 12 vdc fans ON and OFF. I used a test setup this morning with some stud mounted temperature switched and a temperature device. They make-up at 150 degree F, and opens at 120 degree F. I think this is allowing the heat sink to get too HOT! Thanks... Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
