Could be one or more of the tubes is bad. Try replacing each at a time by substituting a fresh tube in each position.
Interferences with EAR 834P Phonostage
I recently bought an EAR 834P MM phonostage, and plugged it to my Moon I3.3 integrated amp through the A2 input (AUX). The phonostage doesn't have its own volume control button. My turntable (ProJect RPM 5) and the 834 are connected with RCA interconnects and a ground wire; the 834 and the Moon Amp with interconnects, no ground wire.
When the phonostage is plugged in the wall plug, even when powered down, i got a very bad humming sound when the amp is switched to A1 input (TV), so i have to unplugged the phonostage from the wall plug to get rid of it, if i want to watch TV...Otherwise, the 834 works great and is very silent.
So, there are obvious interferences, but i'm not sure on what level, and why.
Any thoughts?
When the phonostage is plugged in the wall plug, even when powered down, i got a very bad humming sound when the amp is switched to A1 input (TV), so i have to unplugged the phonostage from the wall plug to get rid of it, if i want to watch TV...Otherwise, the 834 works great and is very silent.
So, there are obvious interferences, but i'm not sure on what level, and why.
Any thoughts?