Conrad Johnson PV-14 background noise

Thank you for your advises,

Dusty, I have to be very close to the speakers, so I guess it is not unacceptable

Vernneal, I will try other sockets.

Rrog, No, I did not get it from CJ. I got it from Ebay. But the old ones I use are Mullard purchased from CJ and they have noise too. And I tried to call client service of CJ but its always answered by an answer machine.

Dwr,could you please elaborate a little bit what is a cheater plug?

Is it a hum or hiss?

The cheater plug just makes a two prong plug out of a three prong plug, you can buy them at a hardware store for under a buck. If you try this and it reduces or eliminates the hum, it could be caused by ground loop.

Have you replaced the electrolytic capacitors. That is the first thing I do after buying older equipment.

My mistake on the PV-14; I was thinking about the PV-12.