I am playing a Les Paul Studio thru a Peavey 5150 2x12 combo, and I'm getting fluctuations in the volume while I'm playing. It will sound normal at first, then within a few minutes, it will get much quieter for awhile, then come back to normal again in a bit. What could be causing this? I'm not sure if it's my amp or maybe the output jack on my guitar, or possibly even my pickups... Does this occur if your tubes are going bad or something? Any advice would be greatly appreciated. Thanks!
_MRBUNGLE_