OT: ATR-124 Documentation

[Michael Bitetti]

Only slightly off topic because its at least a 2" analog tape machine.
I've been charged with making again functional two, maybe three Ampex ATR-124 2" audio multi-track tape machines.
I've had formal Ampex training on them but it was 30 years ago...
Briefly, I'm in search of additional documentation. I have a set of original service manuals but I really need information on add-on kits such as the MP-STC (multi-point search to cue) and board/firmware revision information (were there ECO's on this machine?).
Any former Ampex persons out there have any ideas? Does the LOC have any of these? (there were only sixty some odd of them made).
Sorry for the OT post and thanks in advance for any help and/or direction!
 

Michael Bitetti
Michael Bitetti Engineering
9104 Chalice Circle
Evans, GA 30809
mbitetti at aol.com
h: (706) 868-1658
c: (912) 257-0600
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