My thanks is in the quoted message below, but I will repeat it since it perhaps wasn't clear enough.
This forum appears to be a little too high brow for a common man such as I. --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > > The answer is in the quoted message below, but I'll repeat it since it > perhaps wasn't clear enough. The suggested thermal switch is available from > Digi-Key as their catalog number 317-1094-ND. The Digi-Key home page is > www.digikey.com If you type "317-1094-ND" into the search box, it will > open the page at which the switch can be ordered. > > Yes, you can wire two or more thermal switches in parallel, so that the fan > runs whenever any monitored device exceeds the temperature setting. > > 73, Eric Lemmon WB6FLY > > > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of wqjf348 > Sent: Thursday, October 16, 2008 5:18 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: GR500 Cooling Fan Control > > Thanks for the reply. > > Do you have a good source for that part? > > Also, could I wire two of them in parallel, one on the radio heat > sink and one on the power supply sink? > > Thanks, > > Ben > > --- In Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> , "Eric Lemmon" <wb6fly@> > wrote: > > > > Ben, > > > > I believe that the best solution is to use a normally-open > thermoswitch > > mounted to one of the heatsink fins. My choice is Digi-Key 317- > 1094-ND, > > about $7, which closes at 50 degrees Celsius (122 degrees > Fahrenheit). This > > setting ensures that the fan does not run needlessly, but will kick > in long > > before the radio gets hot enough to affect its health. I drilled > and tapped > > a couple of 4-40 holes, and mounted the switch with some heat- sink > compound > > under it to get good heat transfer. > > > > 73, Eric Lemmon WB6FLY > > > > > > -----Original Message----- > > From: Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > > [mailto:Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of wqjf348 > > Sent: Saturday, October 11, 2008 11:39 PM > > To: Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > > Subject: [Repeater-Builder] GR500 Cooling Fan Control > > > > I am setting up a GR500 with the R1225 radio. It is in the wall > mount > > box. The cooling fan that came with the box runs non-stop. > > > > I would like to be able to control the fan either by slowing it > down > > or making it switched by temperature or PTT of the repeater. > > > > Can anyone here offer some suggestions? It is currently wired > > straight from the power supply. > > > > Thanks in advance! > > > > Ben > > WQJF348 > > West Jordan, Utah > > >
