It's pretty easy to pick up hum in phono cable. If your phono cable has the ability to ground it to a different spot (other than the phono stage), try doing that.
hum with VPI Jr
I have returned to analogue recently and bought a VPI Jr with a AQ 7 arm and Benz Glider M2(purchased used here on Audiogon about 6 months ago). I am getting a low pitched hum when I place the cartridge on the record. This hum is not present with the table on unless the the cartridge is actually in contact with the record. The ground wire is connected although I have not checked it for continuity. The table is plugged into to a speed controller. Any advice on eliminating the hum ?