Okay, there are several steps you can take. Yes, try grounding the phono preamp to your linestage or receiver. Try repositioning the phonostage relative to the turntable and see if you can find a location that minimizes the hum. Try grounding the turntable itself -- not just the tonearm/cartridge -- if you can find a metal connection point under the turntable.
You should take these steps one at a time. It will help if you get (or make) some ground wires terminated with alligator clips -- Radio Shack sells them.
Don't be surprised if at some point the hum just disappears and you can't figure out why. I just went through this drill and that's what happened to me. Good luck, Dave
You should take these steps one at a time. It will help if you get (or make) some ground wires terminated with alligator clips -- Radio Shack sells them.
Don't be surprised if at some point the hum just disappears and you can't figure out why. I just went through this drill and that's what happened to me. Good luck, Dave