[Milsurplus] Need information on I-190 synchroscope

[jmfranke]

I have an I-190 engine synchroscope which I would like to use to compare the 
frequency of two generators.  Does anyone have any hookup or other 
information?

I-190. Synchroscope :8DJ15-AAF10 by G.E., 88-I-2200 (3 Pin) Used in the PBY 
Catalina
Picture at:
 http://www.bjaircraft.com/Synchroscope.JPG


Thanks,

John  WA4WDL
Yorktown, VA