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HR408

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ID = 80777
       
Country:
Great Britain (UK)
Brand: Octron Ltd., Birmingham
Tube type:  Triode, vacuum   RF/IF-Stage 
Identical to HR408

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 3.7 Volts / If 0.08 Ampere / Direct / Battery =
Description

Rac 45.5kΩ, Ia1.18mA, gm 0.35mA/v at Vg=-1.0 and Va=100

This tube had a blue line painted around the bulb.

 
Information source Wireless World (The), London (WW, 79)   Dec 1926
British Radio Valves - The Classic Years: 1926-1946   P. 250 & 331, Supplement p. 80
History of the British Radio Valve to 1940

b4_base_pins~~442.png HR408: Fin Stewart
Fin Stewart


Just Qvigstad
 

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