I have a Marshall 6100 LM 30th anniversary head where just the lead channel has no output.
Clean and crunch channels work fine.
All the pre-amp tubes glow/get hot. ( i dont have a tube tester some cheap good recommendations would be welcomed). Also for future reference which tubes are for which channel?
the tone controls for the channel are working, When I put the master and channel volume up and twiddle bass, mid and treb the tone changes. But the gain knob for the channel doesnt have any effect, and feels a little scratchy to turn.
Is this simply the gain pot needs changing? Or is this a dead tube?
Will tubes still get hot and glow if they are not functioning correctly?
Also if anyone has a schematic for this amp please link or send I have had no luck finding one online.