....
Motors :

Glentek GM 4040 motors brush dc with 7v/1000 tach and 2500 pulse encoder

I also have some fanuc motors size H002 with encoder but no tach

------
So far as amplifiers that I have on hand :

AMC 30A20

Glentek 4568

Servo Dynamics 1525

Fanuc A20B6045

All of these REALLY like to have a tach feedback but as far as I can tell
the the only one that ABSOLUTELY NEEDS it is the fanuc.

Those glentech motors and AMC amps were made for each other. Work very
well with EMC.