Supro Thunder Bolt model S6420 schematic...

[pecorporation]

Anyone have one? Thanks!

[vintagekiki]

Supro 6420 Thunderbolt

Supro 6420 Thunderbolt

[pecorporation]

Thanks! Have a good one!

[pecorporation]

Here's an updated schematic on this amp based on original parts found...
Supro Thunderbolt S6420.pdf

TERMINAL STRIP WIRING PIC.pdf

Here's a video I put together of the repair, as you can tell it caught fire...

YouTube - Supro S6420 Bass Guitar Amp Repair

enjoy!