Turntable Hum

I also had that problem with using Cyrus gear. The power inlet fitting on them only had a live and neutral and no earth. So when i changed  my amp to parasound that had an earth on the power supply fitting, the hum went away. So check the power inlets. 

Had a similar problem. Turns out it was the wifi router. Moved it and hum disappeared. Sometimes it's the simplest things hiding in plain sight.

I have a turntable in my computer room and had a weird kind of pulsing noise even with nothing playing.  It was the nearby wi-fi router.

Had the same problem with a VPI Prime Signature and a Van den Hul

cartridge. I switched to Silnote highly shielded cables. Problem solved.

Believe me I tried everything list here without success.  VPI tone arms 

are known for hum problems. Top quality shielded and directional cables are a must.

@browndt thanks for the tip , I tried some high end Mogami's on the TT to Phono stage , didn't do anything ...🤷🏻‍♂️

 I cannot say exactly what the difference was in my system with TT/phono hum, but I was able to use 4 different phono stages. 2 of them had the hum trouble, 2 didn't. The 2 that didn't were both tube phono preamps. The 2 with hum were SS. Not that it makes any real sense to me. Might have been a coincidence. 

 It just leads me to believe that there is something in the matching of equipment. I bet that the 2 problem phono preamps sounded just fine with the 'right' system.