If your phono stage, (or preamp) is tubed, it could be a tube?
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Sorry I left out all so important information. It is an all tube system, Art Audio
amp, pre amp and phono stage, VPI Aries 1 TT with Dynavector XXmkII cart and
Zu Definition IV speakers. One of these days I'm going to get my system posted
Raymonda- feedback on one channel only?
Today I will start swapping out tubes, I'm guessing starting at the phono amp?
Are you near to anything with a switching power supply? Some circuits can pick up switching noise. Try the simple test of moving your phono stage and/or linestage/amplifier with respect to any other electronics in the room. If it gets worse or better, you at least can know how to minimize or eliminate it, even if the cause is never certain.
Rotating my phono amp 90 degrees in order to reach the IC connections in the back cancels the noise totally. But as soon as I rotate it back to the original position the noise comes back. I tried moving cables around (best I could) one at a time, but this doesn't help.
Lewm- what do you mean by a switching power supply? Would my Silver Circle power conditioner qualify as one? If so, my phono stage is on the shelf directly above it.
Problem solved. Just a slight hiss now at full volume. All I did was switch the
phono amp with another component so it's not above the power conditioner.
Thank you Lewm for that suggestion. I'm still confused as to why that pulsing
noise was only in the right channel, but hey, who cares it's gone.
Took no time at all so I actually had time to post my system today.