I just returned mine for a full refund and went with an Astron power supply. I had tried putting the MFJ in the desk drawer but I could still hear it < quote author="John H Gibson"> 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 blocke d 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 -- View this message in context: http://www.nabble.com/MFJ-4125-Fan-Noise-tp17585585p17659713.html Sent from the Elecraft mailing list archive at Nabble.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
