UA 2108 schematic needed

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UA doesn't supply schematics.
How about drawing out the circuit and share how they get -165 dB  EIN ?
http://www.barryrudolph.com/mix/ua2108.html
Almost as interesting as measuring -154 db THD on an A & P analyzer.


 
I got a  stuffed ua 2108 board off of ebay. I got most of it figured out as far as, what the transformers are and where the wiring goes but theres a couple of things that I dont understand.  If somebody has a power supply that can give me the pinout info that would help aswell. Here's one of the pictures I got off the net.
 

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  • 2108 INSIDE 3.jpg
    2108 INSIDE 3.jpg
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