They may look modern to us, but (worryingly!) they are already over forty years old. Well done for saving them.It's probably from the 70's but another new old stock saved from the trash.. I have a few more but don't know where they are stored?? or if they got sold in the auction??
It should have a tachometer generator but I cheat It is powered by a wall wart with a resistor in series plugged into the generator. The generator does run at 1200 RPM at 60 hzHow does that tachometer work? Is it a frequency meter, calibrated for a six pole generator?
thanks for the PixJust found this thread. I have been collecting meters for about 20 years. Will post a few here to start these are mostly newer ones from the 30's many from decommissioned hydro dams I will also post some rarer ones as I get more time to photograph them.