Would a 24v fan at 12vdc be a solution? I have about 20 of them in various sizes if it would help.
Eric Lemmon wrote: > John, > > Digi-Key and Mouser list both AC and DC fans in many different speeds, > capacities, and sizes. I found a replacement fan for a > Hewlett-Packard signal generator that was form, fit, and function > identical to the original fan- except that the new fan was barely > audible. The original fan was a screamer. The careful design of > modern muffin-style fans allows them to move the same amount of air > with much less noise. Check the dB ratings before you buy. > > 73, Eric Lemmon WB6FLY > > ------------------------------------------------------------------------ > *From:* [email protected] > [mailto:[EMAIL PROTECTED] *On Behalf Of *John J. Riddell > *Sent:* Sunday, January 08, 2006 4:20 PM > *To:* [email protected] > *Subject:* [Repeater-Builder] Muffin Fan speed > > Here's an old idea, that may be worth repeating: > > If you want to run a muffin fan at a slower speed, to reduce noise and > of course lower the air throughput, put a paper capacitor in series with > one side of the AC supply. > > Recently, my Son-in-Law wanted to cool his stereo amp > and I used a 2 Mfd 200 volt paper capacitor to slow the fan down. This > value > resulted in about 62 volts feeding the fan and it run's just fine at > that voltage. > > Other capacitor values will result in different voltages which will create > different speed's of the fan > > > > John J. Riddell, VE3AMZ > 451 Cedarcliffe Dr., > Waterloo, Ontario, Canada > N2K 2J1 > > > > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "Repeater-Builder > <http://groups.yahoo.com/group/Repeater-Builder>" on the web. > > * To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > 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/
