Fender Super Bassman from the silverface era in the lab. Kind of an interesting Bassman because the B+ is only about 400V. Typical Bassmans are around 450-480V. Because the B+ is so low it only does about 70W at clipping. Can be kind of misleading at first since most Bassmans with four power tubes do around 100W.
Big chassis with not much in it. Measuring bias with the transformer shunt method.
Doing it up with a recap so it will be reliable for an active musician. You can see the some of the old caps in the “garbage can” on the left. Power tubes are 70s RCA 6L6GC and they perform just as well as new power tubes.
Huge head enclosure that is almost empty. Wonder why this was the trend of the time??
Fender Super Bassman CFA7002 schematic
Fender Super Bassman layout. You can see how the picture has been altered and other parts have literally been erased to make the layout for this amp……