My solution was just to put the power supply under the operating desk instead of on it. That reduces the noise considerably.
Al N1AL > Question for the List: > > I recently bought an MFJ-4125 switching power supply to use with my K3/100 > transceiver. While otherwise satisfactory, the MFJ-4125 has an > objectionably- > noisy fan. > > On my MFJ-4125, over half of the fan exhaust openings on the back of the > supply are blocked by the fan's motor housing, which makes me believe that > the > power supply originally was designed for a different fan (perhaps a > quieter one), > and this fan is an expedient substitute by MFJ. > > I would like to know if other users also are bothered by the MFJ-4125's > fan > noise, and what they have done about it. > > Have you substituted a quieter fan? Have you installed a series resistor > to slow > down the fan, and with what result? Have you installed a thermostatic > switch to > run the fan only when needed? Or have you given up and simply bought a > quieter power supply? > > Any advice would be appreciated. > > 73, > John, no8v > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
