Antique radios, Old Time Radios
HL21DD
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Country:
Great Britain (UK)
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| Identical to |
HL21DD
= VR44
= CV1044
= HD24
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| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fp)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.15 Ampere / Direct / Battery = |
| Information source |
History of the British Radio Valve to 1940 p. 140 & 166
Babani, International Radio Tube Encyclopaedia p. 110 & 111
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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HL21DD: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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HL21DD: own collection
Peter den Boer
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12
Collection of
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