I've been reading thread after thread on "turntable hum" on this forum and others. However, a lot of the inquiries and recommendations are either vague or not specific to my situation. My "hum" is only at very loud volume (75% of max) and when I am not playing music. If I were playing a record, the music would be way louder than the hum. However, I want to make sure this is not simply a standard condition of turntables. Note: I run a ground between the TT ground nut and the phono preamp ground nut. As expected, without this ground there is a very loud hum at low volumes. In order to avoid confusion, I will list all of my observations below: "Hum" description: - TT motor on or off (I even tried unplugging it with no change) - Audible only when volume up past 50% and no music playing - "Hum" increases in volume when I touch tonearm wiring running from back of tonearm to junction box, - "Hum" virtually disappears when I touch either the metal tonearm wire connector at junction box, the metal connection ends on the RCA cables coming out of junction box or the ground nut on the back of the junction box. However, this loses efficacy when I take a step back, away from the TT and rack. What I have tried: - Unplugging the tonearm only creates a new, louder hiss/fuzz on top of the hum, - Based on advice in other threads, I used a multimeter to test resistance between the TT ground nut and the power outlet ground screw as well as the phono ground nut and the power outlet ground screw. Resulting measurement is zero (0). - I have tried running a wire from TT ground nut to amp ground nut with no change. - I tried running a wire from the TT ground nut to the ground screw in my power outlet with no change. Is this simply a characteristic of TTs? I understand the basic function of a cartridge, a phono preamp and a power amp is to amplify. By turning the TT off and turning the volume up, am I just amplifying low-level noise that is only audible under these conditions? Am I creating a problem that isn't actually a problem? Similar to, "if it hurts when I pull my arm behind my back while bending it like this, then I shouldn't pull my arm behind my back while bending it like this", am I unnecessarily stressing the system? Or is there a legitimate problem somewhere that I can fix to further reduce noise in my system? Thanks in advance for anyone's help!