Antique radios, Old Time Radios
PT4D
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Country:
Great Britain (UK)
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Brand:
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Ferranti, GB |
| Tube type: |
Double Diode-Pentode Power/Output |
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| Identical to |
PT4D
= AC2/PenDD
|
| Similar
Tubes |
Heater different:
PTSD
|
| First Source
(s) |
1934 : History of the British Radio Valve to 1940 p. 146 & 189
|
| Base |
British-7-Pin, old (M7A) (Codex=Nh)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 2 Ampere / Indirect |
| Description |
Pa <8W, 2.5W output into 6500 ohms.
|
| Information source |
Babani, International Radio Tube Encyclopaedia p. 130 & 131
Wireless World (The), London (WW, 79) Data Nov 1934
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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PT4D: Ferranti Valves, List Wb. 560
Achim Dassow
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PT4D: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
More ...
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Just Qvigstad
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PT4D: 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):13
Collection of
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