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ID = 20847
Great Britain (UK)
Brand: British Tungsram Radio Works Ltd.
Tube type:  Signal Diode - one single system   Detector 
Identical to DA101

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 1.2 Volts / If 0.054 Ampere / Direct / Battery =

Va <125V; Ia <0.2mA

Information source Röhren-Taschen-Tabelle, (Franzis RTT)   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   1950 p175
DA101: RTT Schwandt
Günther Stabe † 19.8.20

DA101: Babani 1951-1954
Patrice Zeissloff

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