I've found an issue with the Gentner Phono Stage Manual here in the library.
Audio Metrics (Allied Broadcast) contracted companies to make phono pres for them. Two of these companies were Radio Systems and Gentner. Radio Systems made the "Audio Metrics PA-1 preamp" and the "Audio Metrics Turntable Preamp". Gentner made the "Audio Metrics Tp-84 preamp".
The manual that is in http://www.vinylengine.com/library/gentner.shtml
labeled "Audio-Metrics TP84" is, in fact, the manual by Radio Systems for their "Audio Metrics Turntable preamp" not the "Tp-84". This is why the schematic and layout don't match the interior photos of an Audio Metrics Tp-84.
Thanks Lucky. You cemented the feeling that there was something odd about the tp84 schematic and got me digging deeper.
I didn't know where to post this so I put this bit of detective work here. Now, to find an actual Tp-84 manual.
@davids - Funny you should mention boutique caps. I just saw these today http://v-cap.com/teflon-capacitors.php
Hmmm,...a case of wine...a single capacitor...a case of wine...a single capacitor...it's a toss up (not really!).
@empirelvr - For myself, balanced outs aren't a problem but, I can see that they're another strike against these types of pres in most setups. Not only are they balanced, they only have barrier strips instead of output jacks.