I have several installations in service using the same thermal switch. It
is #317-1094-ND from Digi-Key, for $9 each. This switch closes at 122
degrees F, and opens around 100 degrees F. I drilled and tapped two holes
in a flat area of one of the radio's heatsink fins, and mounted the switch
with thermal contact grease to ensure a good heat transfer.
Be careful in your selection of a fan. After having one (rather
inexpensive) DC fan that caused the RF to be modulated with a hum, I now
buy only those fans that are certified to be free of conducted EMI.
73, Eric Lemmon WB6FLY
kc4wgh wrote:
> 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/
