Before this post goes to the "archive", is there any point of using an toroidal power/main transformer? Will it degrade/influence the circuit in any way?
I've used toroidal power transformers by Antek a few times now, and they work very well. They are big though, you have to work around them with your layout.
As long as you keep DC out of the core, i.e. parafeed or some sort of forced current balanced push-pull, then they can work extremely well with low impedance valves. I think I remember seeing a schematic here somewhere for a parafeed power SRPP stage with television horizontal deflection amplifier valves. This would seem to make good sense since that was what SRPP was developed for-driving a capacitive load. That could be a very low cost amp with great performance on transients.
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