Cathodyne Mu Follower Line Out

[ruffrecords]

Overall the circuit does not make sense to me. What is the objective? A buffer, no gain or a buffer with some gain?

It has a LOT of power gain. That is the point.

Cheers

Ian

 

[Cqwet Dbdfte]

Ok, just a buffer.

 

[ruffrecords]

Ok, just a buffer.

Not just a buffer but a buffer with a high drive capability balanced floating output. And a cost effective one. It does with one triode what most buffers with a similar power gain would take two triodes to achieve.

Cheers

Ian

 

[merlin]

It does with one triode what most buffers with a similar power gain would take two triodes to achieve.

By replacing one of those triodes with a MOSFET

 

[Cqwet Dbdfte]

Maybe like this...?

R18,19, 20 may likely have to be adjusted to cover FETs parameter spreads.
Much smaller than a tube circuit.
Besides the output cap and R20 it could be a postage stamp size deal, with not much heat generation. Circuit is adapted to 48V limiting output swing before clip to 20Vpp.
J1 could alternatively be another DN2540, with a few resistance changes.
The load could of course be a 1:1 transformer.