Heya folks, Ive got a problem and I am hoping to tap some of the collective TB knowledge on this one before I spend any cash on costly repairs or buy a new head all together. Ive got a Hartke LH500 and it is making quite a bit of scratchy, hissy noise. I am pretty sure it isnt my spector's jack, I had replaced it a month or two before the noise began and when I turn my cable in the jack it doesnt make any additional noise or stop the noise. Iv done the same with the the active jack on my head, nothing. Ive also turned the bass/mids/ and treble dials and this also has had no effect either lessening or exacerbating the noise. Any ideas what the hell is goin on here? It is driving me NUTS and there isnt any shops near me that I trust to crack her open. Any ideas/suggestions are welcome. Thanks a lot TB!