So, I've got an AMP BH-260, I know the company went belly-up years ago. I've been using it as a power amp, and running either a Demeter Pre or a TC Electronics Paramatric (or both) through the "power amp in" for years now. But carrying around the rack, to smaller gigs, was getting bothersome. And I wanted to see how the ol' AMP preamp sounded after several years of my Demeter-TC tweaked tone. So I disconnected, and used the AMP head alone..and lo and behold (or behear, I suppose!) turning the volume knob, and also the "tone balance" knob, is giving me all kinds of noise....and the signal cuts in and out, loud and soft, with crackling and popping noise. Do I need new pots? Any ideas on how to fix this puppy? Or do I just buckle down and take it to a repair shop?