I've posted this elsewhere so apologies to those who may have already read this question but I've yet to get an answer... I've just installed my first LOMC cartridge (DL304). My phono stage is a Trichord Dino and I've set it to 100ohm and whatever the aximum gain setting is. The arm is earthed. I'd been led to believe that the capacitance loading would make no difference to a LOMC but 100 pF gives me very intrusive (what sounds like) mains hum. 1nF is absolutely silent. Any idea why this might be?