Some folks may advise to just sell the thing and be done with it, but I have an Ampeg BA110 practice combo that I've used for almost eight years and I still love the thing. Don't want to replace it with something new. But it's been a source of frustration for me over the last year because of an issue that I can't pin down. Some days I switch it on and it works perfectly like it was brand new. Other days it quickly develops this crackle then loses volume, then comes back to normal, then it's gone again a moment later. Doesn't matter which patch cord, or axe. I took it to a local place and plugged in and no problem. Sometimes I take it to practice at a band-member's house. It almost seems like the bumpy ride in the car can fix it. Very frustrating. One guy says it's the voltage in the house. My other amps don't notice it. Crap! So, I'm done with "techs" in Vermont. I travel sometimes to downtown NYC. I'd like to find someone who is willing to diagnose this and fix it once and for all. It's a little bitty thing, and solid state. But I have gotten attached to it. Thanks in advance.