Antique radios, Old Time Radios
GDT4B
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Country:
Great Britain (UK)
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| Identical to |
GDT4B
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| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Triode Thyratron, primarily intended as a time-base generator for television, up to 50kHz. Listed in babani as GTD4B
Va <350; Ia <0.5A peak. Control ratio 45; Voltage drop 15-18.
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| Information source |
Wireless World (The), London (WW, 79) Valve data 1956
Babani, International Radio Tube Encyclopaedia p.305
History of the British Radio Valve to 1940
British Radio Valves - The Classic Years: 1926-1946
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GDT4B: Universal Vade-Mecum, 1960
Anonymous 15 Collector
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Just Qvigstad
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Collection of
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