How do I assemble a cable to make the G-Major´s relay switching work for my Fender Pro Tube Series Amp ?
(Pro Tube Twin Amp / Pro Tube Concert Reverb / Pro Tube Pro Reverb)
Please assemble an interface box/cable according to the attached schematic.
The components are available from most electronic parts suppliers.
Please note that this interface is different from the one for the older Fender Twin.