Antique radios, Old Time Radios
7A3
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Country:
Great Britain (UK)
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| Identical to |
7A3
= PenA4
|
| Similar
Tubes |
Normally replaceable-slightly different:
A70C
; A70D
; N41
; Pen4VB
|
| First Source
(s) |
22.Nov.1935 : Wireless World (The), London (WW, 79)
|
| Base |
British-7-Pin, old (M7A) (Codex=N)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 2 Ampere / Indirect |
| Description |
Power Output 3.75W at Va 250V and Ia 32mA.
|
| Information source |
History of the British Radio Valve to 1940 p. 144 & 189
Babani, International Radio Tube Encyclopaedia p. 14 & 15
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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7A3: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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7A3: Brimar Radio Valves 1936
Adrian Riesen
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6
Collection of
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