Antique radios, Old Time Radios
TDD2
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Country:
Great Britain (UK)
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| Identical to |
TDD2
= K23A
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| Similar
Tubes |
Normally replaceable-slightly different:
DDT2
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| First Source
(s) |
22.Nov.1935 : Wireless World (The), London (WW, 79)
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| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fp)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.1 Ampere / Direct / Battery = |
| Description |
Top Cap Grid. Metallised bulb only (1935). Ra 12,000 ohms, gm 1.4 mA/V.
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| Information source |
History of the British Radio Valve to 1940 p. 150 & 166
Babani, International Radio Tube Encyclopaedia p. 146 & 147
Taschenbuch zum Röhren-Codex 1948/49
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TDD2: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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TDD2: Mullard Maintenance Manual 1954
Achim Dassow
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):7
Collection of
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