Hi Mark,
Hope I'm not a bother, but you be the man with the golden soldering iron! while, I'm a ole' dog (with far too few cranial cells left sparking, ) wannbe with just enough wisdom to not electrocute myself, but not enough to keep from burning the house down!. I have the same PPP 4/6L6 40 watt Baldwin amp you modded in the pics, and would like to know if it were possible/feasible to do a simple rewire on the sockets to run EL34's. (after installing a bucking tranny on the input to drop the input volts a tad) I plan to also try adding some London power mods for getting the tubes to fatten up just a touch (don't like heavy EL34 tube distortion) as this will be converted into a guitar power amplifier to run pre-amps thru. I appreciate any suggestions and recommendations as I do not wish to feed money to a dead horse. Thanks.. kenny H