Huh, looks like Gordon Rankin already tried a higher power 807 SE amp with mixed results.
https://www.fidelity-online.de/wp-co...ractices-2.pdf
The resulting power isn’t all that much more than what we can get with the KT88 Firebottle. I am also curious if the 20lb output transformers are really necessary. The extra handful of watts requires that much of a jump? I know both Gordon and Mike were both experienced designers but I dunno, seems like the OT could be smaller and less expensive.