Antique radios, Old Time Radios
HR408
Country:
Great Britain (UK)
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Identical to |
HR408
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Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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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.
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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
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HR408: Fin Stewart
Fin Stewart
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Just Qvigstad
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