Antique radios, Old Time Radios
VHT4
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Country:
Great Britain (UK)
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Brand:
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Ferranti, GB |
| Tube type: |
Pentagrid-Converter (Heptode) Pentagrid (old) Controlling (mu) |
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| Identical to |
VHT4
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| Similar
Tubes |
Heater different:
VHTS
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| First year |
22.Nov.1935
Wireless World (The), London (WW, 79)
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| First Source
(s) |
11.Aug.1933 : Wireless World (The), London (WW, 79) p107
1933 : History of the British Radio Valve to 1940 p. 146 & 198
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| Base |
British-7-Pin, old (M7A) (Codex=Seo)
Top contact screw type.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC |
| Description |
This is the first British Pentagrid Frequency Changer.
Not P8A (Roehren-Codex) base but B7.
|
| Information source |
Babani, International Radio Tube Encyclopaedia p. 154& 155
Wireless World (The), London (WW, 79) nov 1934
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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VHT4: Ferranti Valves, List Wb. 560
Achim Dassow
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VHT4: Ferranti Valves List Wb. 560
Achim Dassow
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Just Qvigstad
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VHT4: Ferranti Valves List Wb. 560
Achim Dassow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):22
Collection of
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