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ID = 57778
Tube type:  Relay in glass (not Relay Triode)   Text 
Identical to HG1002
Similar Tubes
Normally replaceable-slightly different:

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament --/--
Description Single-Pole Double-Throw Mercury-Wetted Relay. Make-before-break contacts, rated 5A, 500V, 250VA max. Operating time 2ms.
Coil: 4000 ohms, operate 7.5mA, release 3.3mA, 33 to 110 volt DC operating. Clare, USA 
Dimensions (WHD)
incl. pins / tip
x 67 x 28 mm / x 2.64 x 1.10 inch
Information source - - Manufacturers Literature   
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1~~6.png HG1002: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad

Collection of



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