So, I changed tubes in my jolida fusion preamp recently and started to get a repeating buzz through my speakers, when the music isn’t playing— not sure if it is creating a small amt of noise when music is playing.
buzz is in both speakers at roughly one second intervals
Mini zen running roon>ultra rendu ( linear power)>gungnir>jolida preamp>Schiit aegir>klipsch heresy 4s
the issue occcured when I was using the ultra cap 1.2 to power the ultra rendu, but disappeared when I switched to a sgc linear power supply.
Any ideas on cause, could the ultra cap be emitting em signal that the tubes are sensitive to. I’d prefer to use the ultra cap here, all else being equal.