Compound (Sziklai) pre

Some progress. It works from the start. Powered by ~59VDC, with sine output ~960mVpkpk, 327mVrms, it has distortion 0.063%, likely better since my supply is not the best at the moment.
Very interesting.
Personaly I detect 2nd harmonic at 0,63% and 3rd at 0,22% during an extensive test of sensitivity of different distortion components.
You are very close to that relationship but a magnitude lower so I suspect that it can handle some complex music too before being noticed as colouration.
Hope for a very neutral, musical and transparent sound character with that harmonic distortion pattern.
Will follow your progress...
 
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