It could be done, but it wouldn't be practical- Tube voltages, especially for a tube power amp are a lot higher than solid state, for one thing, and solid state transformers are missing some windings, for instance for the heaters (filaments) for the tubes. To convert the amp, you could use the chassis, knobs, pots, but not much else. I guess I just restated what everyone else did here! lol!www.dfwsupergeek.comps-before you get radical, take into account that solid state amps have come a long way. They also take much less power to run, are generally less fragile, and are a lot cheaper to maintain!