Antique radios, Old Time Radios
DA
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Country:
Great Britain (UK)
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Brand:
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Ferranti, GB |
| Tube type: |
Triode, vacuum Audio Frequency |
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| Identical to |
DA
= C30B
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| Similar
Tubes |
Normally replaceable-slightly different:
HL1320
Other characteristic (electr. data):
HL13C
|
| First Source
(s) |
1935 : History of the British Radio Valve to 1940 p. 178
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| Base |
British-7-Pin, old (M7A) (Codex=Nw)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 13 Volts / If 0.2 Ampere / Indirect / Specified current AC/DC ~ = (Series working) |
| Description |
In the Röhren-Codex it is falsely stated that it is a double-diode.
Typical:- Va 200; Ia 3.7mA; Vg -2.6; Ra 20,000; gm 2.2mA/V
The Mullard HL13C is similar but may need a bias change to about -3.5 volts (Mullard Service data 1951)
Text in other
languages (may
differ)
|
| Information source |
History of the British Radio Valve to 1940 p. 146 & 178
- - Manufacturers Literature
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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DA: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
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Just Qvigstad
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