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ID = 82905
United States of America (USA)
Brand: Edison, Thomas A., North American Phonograph / National Phonograph; Orange, NJ
Tube type:  Relay in glass (not Relay Triode) 
Identical to 501-B1952

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 26.5 Volts / Indirect / Parallel, (AC/DC)

Thermal delay relay

26.5 Volts heater

10 Seconds delay

Contacts N/C 3 Amp @ 150 Volts DC, 250 Volts AC

Information source -- Collector info (Sammler)   
501-B1952: My Collection
Bruce Morgenstern


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