To Aesthetix users

Patrick, it definitely sound like RF. I bet if you placed the Io somewhere else it would not be affected by the RF. I don't think changing the el34's will do anything. BTW is this noise recently developed?

Hi Nkj,

It's difficult to say whether the noise developed recently, but I didn't notice it until I moved the system in my room, about 4-5 months ago.

Subjectively, though, it seems to be getting louder.

Best
Patrick

An update. Jim and I have definitely identified this as RF and narrowed it down to the Io. It's not tube noise and it's not a grounding problem and it's not coming from the turntable. It doesn't make any difference which outlet it's plugged into, and it doesn't make a difference which circuit it's plugged into in the house.

Next test will be borrowing some longer interconnects so that I can move the Io around and see if the RF is being transmitted through the air.

If that doesn't work it, it's a dedicated line to the Io and/or borrowing Running Springs Duke power filter dedicated solely to the Io.

I thought regular readers might appreciate an update!

Patrick

I plugged mine into a Power Wedge Ultra 116 and noticed a slight buzz. However the buzz was resolved when I plugged it into the wall outlet.

The latest on my Io Sig and RF saga, if anyone is still reading:

I moved the Io power supply away from the windows (back toward where the system originally resided), which also took it further away from the ExactPower.

Massive decrease in RF. It's still there, but nowhere near as loud. Still a problem if I'm listening to sparse acoustic performances at high volumes, or if I'm listening on headphones.

Next thing will be to try to move both the Io and the power supply even further back into the room, which will need some rearranging, to say the least.

Still no word back from Lenny at Running Spring Audio with his Duke power filter - just emailed him again.

Jim White has been most helpful and even listened to the RF over the phone to try to diagnose. I have a feeling that physical location in my apartment is going to be key here, perhaps with the addition of a dedicated line and/or dedicated power filter for the Io.

Larry, I've got to return your Versalab Red Rollers - thanks again for the loaner!

Patrick