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Information - Help 
ID = 10083
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Double Triode   Power/Output 
Identical to HP2 = RE402B
First Source (s)
16.Mar.1934 : Wireless World (The), London (WW, 79)

Base British-7-Pin, old (M7A) (Codex=Nr)
Filament Vf 2 Volts / If 0.4 Ampere / Direct / Battery =
Description For Class B Output

Va < 150; Max anode current swing 50mA, Max input 40V peak grid to grid.

Static anode current at Va of 100 and VG=0 is 2.5mA total. 

Information source Taschenbuch zum Röhren-Codex 1948/49   

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