Frequency meter, 40 to 60 cycles per second, 410 v

Made:
1960-1969
maker:
General Electric

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Frequency meter, 40 to 60 cycles per second, 410 volts, made in England by G.E.C., patent No.648569, in wooden case (handle missing, clip of cover broken off), pointer type with crossed-coil movement, the frequency dependence beng produced by an inductance in series with one coil

Details

Category:
Electricity and Magnetism
Object Number:
1994-22
credit:
European Space Tribology Laboratory