Tube DIY Asylum

RE: Balanced input - is this correct?

76.90.100.230

Tre'

P

In Reply to: RE: Balanced input - is this correct? posted by Oldbean2 on February 04, 2024 at 19:07:56

Both differential amps ( the driver stage and the output stage) will be more "balanced" if you don't use the cathode bypass capacitors.

With the capacitors omitted there will be some local current feedback that will help force balanced operation.

This only works if the tubes are biased for Class A operation.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Follow Ups:

RE: Balanced input - is this correct? - Oldbean2 21:38:22 02/06/24 (1)
Thanks! I doubt I can get the output stage in class A, my voltage is likely on the high side for that.

I remember that much, but it's been quite a while, I can't recall how to figure the operating point class A. I find the definition over and over again when I google, but no practical approach for the layman like me.

Back for a bit again. Ignore me if you like.
- No problem running class A FWIW with your B+ nt - Ralph 09:42:56 02/07/24 (0)
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