Hum is usaullly to do with a grounding problem, or the fact, that your amp is at a high voume and you have a lot of gain involved. Does the hum stop when you put your hand on the strings?
Quote by Kensai
You'll find whisky very different, but try it and you'll grow into it, soon you and whisky are one, but still two, lovers dancing across a frozen lake under moonlight, wrapped in honey and warmth.

Sums up whisky perfectly