Daverz;689929 Wrote: > Have you tried a different amp? I had an amp that would hum when the > HVAC kicked in. I assume because of an inadequate power supply.
Was it transformer hum, the transformer itself hummed ? There migth be a good reason if you lived with a weak network and the hvac used halv period rectifying for example in the fan speeds, old stuff can be designed that way. I was living in a rural place for a while and managed to get my power amps humming with the halv power setting on the heater for My car ? It was a crude old design where the heat setting was done with half bridge rectifying yuk. What happens if the electrical net is weak, you get significant DC potential on AC mains ! That is around > 1 volt DC this is not much you say ? But the core of a AC transformer are saturated when faced with DC how much it can stand depends on it's design . You can also try this with an old hairdryer many of them have equally shoddy design. -- Mnyb -------------------------------------------------------------------- Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: Touch + powered Fostex PM0.4 Misc use: Radio (with battery) iPad 64gB wifi +3g with iPengHD & SqueezePad (in storage SB3, reciever ,controller ) ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=75596 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/discuss
