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Information - Help 
ID = 50088
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-B1882

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 6.3 Volts / Indirect
Description Thermal delay relay
300s delay, normally open, 3A , 450V AC, 450V DC 
Dimensions (WHD)
incl. pins / tip
32 x 95 x mm / 1.26 x 3.74 x inch
Weight 44 g / 1.55 oz
Information source - - -   
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Klaus Rüdiger

501-B1882: Manufacturer's Literature
Emilio Ciardiello


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