I'll check for you but I do think 5k ( prim. ) is very good for ( ! )
EL84 , 6V6 , 6L6 , EL34 ( check hammonds 25 W se-O.T. )

I do have experienced that large O.T.'s usally have more
bass/fatness and volume but that's my opinion .

http://www.hammondmfg.com/

type 1628SE

Good luck !

Chris