Antique radios, Old Time Radios
HAD
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Country:
Great Britain (UK)
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Brand:
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Ferranti, GB |
| Tube type: |
Double Diode-Triode Audio Frequency |
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| Identical to |
HAD
= C23B
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| Similar
Tubes |
Normally replaceable-slightly different:
DTU1
Other characteristic (electr. data):
TDD13C
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| Base |
British-7-Pin, old (M7A) (Codex=Nb)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 13 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC |
| Description |
Typ:- Va 200; Ia 4.5mA; Vg -2.0; Ra 18,000; gm 2.9
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| Information source |
History of the British Radio Valve to 1940 p. 146 & 179
- - Manufacturers Literature
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
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Just Qvigstad
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HAD: My schematic collection.
Pier Antonio Aluffi
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| Data Compliance |
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