I just set up my Rogue Cronus Mag. last week and played all week. I just rolled my first set of tubes today with RCA clear tops NOS 12au7's and 2 new Gold Lion 12ax7's. Upon letting it warm up before playing I noticed a faint hum in the right channel speaker. It finally went away and played music most of the afternoon with no trouble. Upon stopping the CDP the hum came back a bit louder in the right channel. I'm assuming I have a bad tube somewhere but not sure which one or how to tell. The three clear tops appear to be glowing just fine with no red plating. I'm unable to tell if the ax7's are glowing or not. This is my first experience rolling tubes and I'm not happy!
Any help would be greatly appreciated.