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ID = 14090
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to DEH410
First year Oct.1928 - - Manufacturers Literature Date of Marconi Publication No. 520A.

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =

Dull emitter high gain amplifier. Mu 40; 0.66mA/V slope; 60K impedance.

Dimensions (WHD)
incl. pins / tip
46 x 193 x mm / 1.81 x 7.60 x inch
Information source - - Manufacturers Literature   Pamphlet 243
DEH410: Sammlung IM
Anonymous 557 Collector

DEH410: own collection
Peter den Boer

Collection of a member from D

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