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ID = 30638
Great Britain (UK)
Brand: Ericsson Telephones / British Ericsson / Etelco (ETL); London
Tube type:  Thyratron Cold-cathode 
Identical to GDT120M
Similar Tubes
Other characteristic (electr. data):

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament --/--

Primed Trigger Tube. With auxiliary illuminating diode.
Typ Va=315; Ik=3.5mA.

Dimensions (WHD)
incl. pins / tip
18 x 36 x mm / 0.71 x 1.42 x inch
Information source - - Manufacturers Literature   

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