The Astron SS-30M is a fine power supply with one exception, very loud fan noise. Most everyone solves the problem by putting an 100 ohm resistor across the fan thermal switch, which causes the fan to run all the time, but still noisy at full power. I didn't want mine running all the time, checked out the specs of the Sunon fan, it sells for $2.55 at Digikey, and is rated for 12 volts. My power supply is running at 13.9, almost two volts high for the fan. I inserted a 20 ohm resistor in series out of the thermal switch, fan runs at about 12 volts and is much quieter. I may replace it with one of the Noctua fans and see if that works better. The Noctua 80mm fan is also rated at 12 volts so I plan to leave the resistor in place for now. More to come. Darryl, KK5IB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
