Ed, I would go for a grounded grid circuit. As Jim pointed out, 25 watts too much for grid driven AB1 or AB2. Don't have an exact circuit, but the1983 Handbook describes an amp using a pair of 4-400s running GG. Am sure it could be adapted to a single tube, or maybe you'd consider running a pair. I can copy the article for you.
Dennis D. W7QHO Glendale, CA
