Antique radios, Old Time Radios
Pen4VB
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Country:
Great Britain (UK)
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| Identical to |
Pen4VB
|
| Similar
Tubes |
Normally replaceable-slightly different:
7A3
; A70C
; AC2/Pen
; N41
; PT4
; PenA4
|
| Base |
British-7-Pin, old (M7A)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1.95 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Unusually high slope = 10mA/V for the 1930s. Rk of 145 ohms needed for a bias of -5.8V with Va of 250 and Vs of 100V.
|
| Information source |
History of the British Radio Valve to 1940 p. 150 & 190
Babani, International Radio Tube Encyclopaedia p. 126 & 127
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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Pen4VB: telefunken werkstattbuch
Anonymous 10 Collector
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):43
Collection of
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