basically i have an old gutted hammond Ao-29 chassis with the stancor made hammond transformers. so here is the thing the tube in the AO-29 was a 5u4 and hte output tubes were 6v6. basically what i want to know is can i build a 5e3 circuit board and use the 5u4 rectifier tube with that sircuit, if so what changes might need to be made to the circuit in order to do so? also, the plan is to add the 6au6 tremolo circuit to this as pulled from a silvertone 1482 schematic. so to summarize i would like to build a 5u4 rectified 5e3 circuit with a 6au6 tube rectifier. any help would be apprreciated, all searches just bring up the usual 5e3 had a 5y3 tube, will burn up transformers, etc. which i do not think applies in this case as the ao-29 per schematic had the 5u4 rectifier on the transformer. my only other option would be just to look at peoples conversions and basically rebuild it as the only thing in it is the transformers ( pt and ot) tube sockets, and 2 wirewound resistors ( not even any wires in the thing outside of those on the transformers. basically a ground up build rather than a "conversion").