Power off any othere dvices in the room you can. Routers, switches, thermostats (if WiFi enabled), cable TV, satellite receivers, etc as well as light switches, wall-wart chargers, anything at all that draws electricity.
See if this helps any.
Next, disconnect the phono stage from the AC outlet.
Fluorescent / high efficiency light bulbs, etc. can also contribute. Let us know.
Erik
See if this helps any.
Next, disconnect the phono stage from the AC outlet.
Fluorescent / high efficiency light bulbs, etc. can also contribute. Let us know.
Erik