I need to add a filament transformer to my Champion 600 to get the tube rectifier to work, but I have a couple of questions I'm hoping someone can answer. I'm assuming I would solder the primary wires to the power switch? Would I need to add another fuse? Or could I use the fuse holder I already have? If I used the same fuse holder would I need to increase the fuse? I wasn't quite sure what to search for, so sorry if this has already been covered. I tried google, but I didn't see any schematics for adding a transformer.