What I understand by asking on other forums is that this amp are a copy of Pevey amps from the same time period. This amp shall have solidstate preamp but it have a tube poweramp. So I don't think I could change any tubes in the driving stage for the reverb. I shall try to email that guy at Accutronics to hear what he have for ideas of this problem. I got a schematic but there are not any specifications on the reverb tank on the schematic and I'm not so good to read the schemaitc so I can figure out what tank it should be by reading it, if you will can I email the schematic to you.

/Bo