Have you tried a 110V shaded pole motor fan? Only 60Hz magnetic noise, no brushless commutation or brushes.
-----Original Message----- From: time-nuts [mailto:[email protected]] On Behalf Of Mark Sims Sent: Wednesday, July 13, 2016 9:50 AM To: [email protected] Subject: [time-nuts] HP5370 power supply measurements I have replaced the fans in all my 5370's with quiet 12V (150-250 mA) brushless DC fans running off of the 10V rail. I placed themocouples around the inside of the unit and compared before and after temperatures and found no significant differences. I have used several different models of fans... whatever the local surplus store had at the time. I also replaced the fans in my HP16500 logic analyzers (aka pizza ovens) with much quieter fans. ----------------------------- > Speaking of fan noise -- you can't really get away with replacing the internal fan with one that moves less air, so it is hard to find a replacement that generates significantly less noise. If you find one, please share the make and model -- all 5370 owners would love to know. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
