Many line transformers like Jensen or Lundahl has very low
distortion. No reason include them in feedback loop.
Use secondary for active amplification stage correction or look
at Steve 1'st schematic.
Peranders,
I'm crasy diyer and I like to build crazy amps and they
suddenly sounds better then some "normal".
I have no doubts ther is many trasformerless amps better than my ugly amp, but I can't find the trick.
It's a certain (good) feeling to test crazy ideas. I have done this myself when I was younger but looking back none of them was particulary good but it was fun.
