TH-30 Volume spike
Posted: Sat Jun 29, 2019 12:16 am
I’m new to the board and have looked everywhere under the FAQ’s but don’t see my issue. Please help, if possible. I appreciate it.
I just bought a new TH-30, and a single PPC112 cab. When I turn up the clean side, the volume adjusts as expected from 1-2, then SPIKES into high output between 2-2.5. After 2.5, it returns to its expected level. This only happens on clean channel. When I looked at the tube schematics I assumed it was clean preamp tube on the front far right. I reset that tube and nothing changed, then I flipped switch using only half the 12ax7 tubes at the lower volume, same issue.
I really want to keep this amp, but it’s annoying. Anyone else have this problem.
Thank you!
I just bought a new TH-30, and a single PPC112 cab. When I turn up the clean side, the volume adjusts as expected from 1-2, then SPIKES into high output between 2-2.5. After 2.5, it returns to its expected level. This only happens on clean channel. When I looked at the tube schematics I assumed it was clean preamp tube on the front far right. I reset that tube and nothing changed, then I flipped switch using only half the 12ax7 tubes at the lower volume, same issue.
I really want to keep this amp, but it’s annoying. Anyone else have this problem.
Thank you!