Re: output tranny info please
Jeremy,
Of course, as all have said here, you can safely use a larger transformer. However, a higher power rated transformer will likely be wound with heavier wire, and could in fact, have less bandwidth than a smaller one. That, by no means, does not say that a large transformer cannot have wide bandwidth, but it may be more difficult to achieve. That said, with the response of guitars and guitar amps in general, I do not see a problem here.
But make no mistake about, they will sound different. Contrary to popular opinion, there is an amazing amount of black magic in transformer design - there are are so many parameters, and so many ways to skin the same cat.
Recalling what you know about the sound of rectifier tubes, I'm sure you know the better sounding transformers as well. Using an overpowered one could make an amp sound cleaner and easier to listen to, whereas a matched one might sound a little looser and dirtier, which sometimes will make people think it's more powerful - all depends what you're after.
Noth