Yes, it's been a long old haul Joe, but educational. "WYSIWYG is the correct term" Eh? Whilst your single implicate wobbly Yugoslavian gymnasts
: )
"Are the meters scaled to "11"?" Good idea David : )
That's the one Andy, I'll be sure to denote 11 in matt black : ) Yep, still interested mate, I'll drop you an email.
Did the meter needle's today in gold leaf, they don't look too bad I think, they were very tricky to do, the gold leaf is stupid thin, sticks to anything that comes within 3ft of it due to static I guess but would stick to the needle's themselves, I used clear lacquer i the end as glue. One other niggle with it is that to clean the finished needle up I used a softish brush and the gold leak turns into flakes that jumped into the meter doings. Anyhoo, see pic.
So the amps are done bar a few tiny niggles. Specs 120w, freq response 1dB down at 5hz then flat to 28khz, 3dB down at 33khz, N = 20mV and last THD figures - 0.01% @ 1w , 0.07% @ 10w, 0.21% @ 50w and 0.28% @ 112.5w all at 1khz, THD meter won't go higher than 30v RMS. Need to build some more spot oscillators at different frequencies.
Rough schematic of front end and PS and last few pics.
Andy.