Long list... Have some trouble placing them right, but I have:   Audial AYA 1 & AYA II  (TDA1541A NON-OS) Monarchy M22B (PCM63K) Parasound DAC 1000 (PCM63K) Krell SPB-32X (PCM58K) + some kits & modded chinese fleabay-dac's....AD1865/TDA1541A/PCM1794/...   Arne K

I'm "new" with tubes too... But to measure output transformer; de-solder from PCB, measure resistance of the primary,(half value=center-tap/B+), then measure from speaker-end. To measure transfer-ratio, you need a signal-generator, or something that can give a volt or two sinewave at ~ 100Hz...

Good job...If you want to make it cleaner/easier, just draw one channel. Do you have a chance to measure the output-trafo? Arne K

If someone just could find / draw a schematic on this amp...it would be an easy / simple job to modify it! Arne K