First I tried a simple grounded cathode gain stage
(ECC82/12AU7 both triodes paralleled) with the
transformer primaries in series as plate load,
and then a combination of a ECC82 grounded cathode
gain stage followed by a 6CG7 cathode follower
(both triodes paralleled), with the transformer
primaries in the cathode path.

The results in both cases were - ummm - interesting,
but far from being disappointing. I guess with some
further experimentation the results may even be quite
acceptable, if one does not expect the impossible from
such an unconventional, but simple setup.


With the two primaries avaliable, you could create a push-pull circuit.
Using a dual triode like the 12AU7. You'll need a phase splitter, though.