djones51
Power supply or transformer hum is harder to get rid of short of replacing the offending item or getting rid of the component.
No, not really.
Hum in a system could have several causes:
- DC offset
- ground differential
- bad capacitor
- a fluorescent ballast on the same or another circuit
- a dimmer lighting switch on the same or different circuit
- poor grounding
- a poorly sealed transformer
- loose nut(s) on a transformer
. . . and more
In the three residences, I’ve lived in the past 20 years, hum has been completely eliminated each time depending on the cause. None of the cures included replacing any equipment at all. I’ve never had a LPS that caused a hum whatsoever. Each LPS significantly improved the SQ. They generated clean power.