Fancy getting into DIY? This kit could get you started. It’s a master volume ‘mod’ that you can fit into your effects loop. These are commonly used on Hot Rod Deluxe amps, but this kit will avoid the stress on the Hot Rod Deluxe FX loop jacks that some kits can cause.
2x high quality Switchcraft jack open frame sockets,
1x 16mm 220K pot (choose linear or log above)
1x 1590A style enclosure, pre-drilled
Builders should be able to read a schematic, no assistance will be offered