On Apr 2, 12:14 pm, "tubegarden" wrote:
On Apr 2, 6:53?am, "Ed Engelken" wrote:

Googling the term, I see that the 52 tube seems to be an example where
both grids are brought out to individual terminals.

=======================================
The #46 is another. The 46 was popular in a number of A****er Kent
radios circa 1932-33. ?Class B Push-Pull output stages in high-end
radios had a brief run in the early 1930s, then faded into history. ?--
Ed

Hi RATs!

I have a huge P-P 46 vintage amp. It is not yet functioning. It is
clearly very well built

Grow up, Class "A" does not mean good, it means simple ... which,
despite some journalists' daydreams, is not exactly the same
thing ...

A push-pull pair of zero-bias class B triodes is even more remarkably
simple.

When I first saw the schematic of a 811A P-P audio amp, I was
astonished to find not a single resistor or capacitor in the circuit.
Two tubes, input and output transformers, and connections to a
filament supply and a plate supply. That's all there is, folks!

Tim.