Andy, don't listen to Peter with regards to the AC adaptors. If you have to resort to that, the equipment needs to be fixed as running it that way can be dangerous.
Need help solving a hum problem
I have been having problems with a hum issue in my system. I have a VPI classic 1 that is connected to a rogue ares tube phono. I know that the tubes will cause a bit of hiss but, this is more of a low level hum. I do have my turntable grounded to the phono stage. I purchased an APS purepower 1050 with hopes that it would solve this issue as the APS is supposed to isolate the components from the power grid. I believe the APS unit is doing the job properly as the hum is not present with any other source, only the turntable. This leads me to think it is either a ground issue or EFI/RFI on my IC's. I am using the VPI phono cable. I am not sure what brand it is. I have read other reports of this cable being noisy. I am also using nordost blue heaven RCA IC's from my phono stage to my pre-amp. I am not sure if these are shielded or not. They are the flatline type cable. I am almost positive the problem lies within the turntable and phono chain somewhere. Should I have my phono stage grounded to my pre-amp? If so, What should I use for a ground cable? I have also thought about trying some audioprism quietline wall warts. Any suggestions are welcome