push-pull in a Vibro-Champ

[Groover]

I have an urge to put a push-pull output section in a Vibro-Champ, to make it like a tiny non-reverb Princeton, except maybe with cathode bias and no neg FB. It seems to me this could be done without having to add any tube sockets by
a) building a small rectifier with diodes or using a Weber copper cap module; and
b) using an interstage transformer for a phase inverter. (According to something I read in a Gerald Weber book if I use a transformer with a 1:2 winding ratio I can get some gain out of it too.) and
c) changing the OT of course.

Any thoughts about and/or "cons" to this idea?

[Groover]

anybody want to chime in on this?

[Bruce / Mission Amps]

anybody want to chime in on this?

Sounds fine to me, except someone has already done it... use the schematic from a Fender Musicmaster Bass amp.

[Groover]

That's what I'm going for - a Vibro Champ front end with a Musicmaster Bass back end - any caveats?

I notice the Musicmaster has a Power transformer with a much lower voltage secondary that the PT in the Vibro Champ - so do I need to adapt something there?

[Groover]

Can I, provided I tie the grounds of the two amps together well, break the connections between the respective V1B stages and the power sections of both amps, and jumper the Vibro Champ front end into the MM Bass interstage transformer/output section to see what this will sound like?

I'm thinking I would take the signal from the Vibro Champ off the junction of the plate and the plate load resistor, and lift the connection to the .02 coupling cap.

But I don't know how to connect this on the MM Bass with respect to the IS primary and the 15k resistor in parallel with it.

I guess I don't understand the interaction between the IS primary, the parallel 15K resistor, and the B+ to the plate of V1B