Hi, all. Newbie here. I own a B-22 amp that I think dates to 1965 (had it for years, obviously). The Jensen speakers in it date to that year. I wondered if anyone could refer me to a schematic as I'm wondering if some of the caps might be getting old as it seems to lack a little "punch" like I remember it having. Even so, the thing sounds awesome, especially with my 60's Hagstrom 12-string! I'm assuming that this is a pretty rare model. Thanks ahead of time!