Re: fan timer circuit I've seen a number of fan delay, time on, time off circuits posted on web. The "neat'o web page" url I just posted here on the group has one and it might be the one you're looking for.
http://www.w1ghz.org/small_proj/small_proj.htm .... and the fan controller information is about half way down the page with a picture and down-loadable zip file. My own personal preference is to run everything warm and even a lot higher temp than most of you would expect. In a repeater station operation only an RF PA and un-modified Astron Power Supply with an undersized heat sink might get a fan. Never a failure of a well planned installation. Some of our local "start-up" radio clubs throwing repeater packages in place often start out using and stay with an external RF amplifier designed for mobile operation. Sometimes the amp runs so hot you can't keep your hand on the heat sink but I've yet to see one fail. cheers, skipp > "Bob M." <msf5kg...@...> wrote: > > I would think that the person who designed it, and submitted it for posting on r-b, built and tested it. > > Did you have a problem with it? Do you think there's an error in the diagram? If so, it should be fixed. Please provide more info. > > Bob M. > ====== > --- On Sat, 12/20/08, Michael Ryan <mryan...@...> wrote: > > From: Michael Ryan <mryan...@...> > Subject: [Repeater-Builder] fan timer circuit > To: Repeater-Builder@yahoogroups.com > Date: Saturday, December 20, 2008, 1:57 PM > > I was directed by someone on the reflector here some months back, to a cooling fan timer circuit that is posted on the repeater builders website. I wonder if anyone has tried to build this? > - Thanks > - Mike >
