Having just got going with amp building, I've read everything I can get my hands on and my first project has been a kit based tube amp. It's coming along well, and I'm already planning the next project - one that ups the ante beyond pure kit level.
I have a book from Tino Zottola that has projects for five popular amps - I'm doing the '59 Bassman. His parts list calls for an output transformer with a 4000 ohm primary / 4 ohm secondary rated at 50 watts.
That doesn't seem to be a real common off-the-shelf item, but there are several that are close. 4000 primary / 8 secondary seems to be out there, as are transformers with maybe something like 4200 primary.
So my question is - what is the implication of this? It seems to me like an 8 ohm secondary would just mean I'd need to use an 8 ohm cabinet - which is fine, I already have a few of those. Also from what I've read, going from 4000 to 4200 primary would be no big deal. Is there any sort of tradeoff?
Thanks
-Toby