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ID = 57536
Great Britain (UK)
Tube type:  Signal Diode - one single system   Detector 
Identical to 1D13
Similar Tubes
Normally replaceable-slightly different:

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 1.4 Volts / If 0.15 Ampere / Indirect / Battery =
Dimensions (WHD)
incl. pins / tip
x 54 x 19 mm / x 2.13 x 0.75 inch
Information source - - Manufacturers Literature   Data sheet dated October 1948
Taschenbuch zum Röhren-Codex 1951   Nachtrag 1952

1a3b~~1.png 1D13: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
1D13: own collection
Peter den Boer


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