Antique radios, Old Time Radios
DER
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Country:
Great Britain (UK)
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| Identical to |
DER
= CV1642
= VT33_GPO
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| Similar
Tubes |
Other shape (e.g. bulb type):
LT1
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| First Source
(s) |
1922 : British Radio Valves - The Vintage Years: 1904-1925 p.51,52
1925 : Saga of the Vacuum Tube, Tyne p.382
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| Predecessor Tubes |
LT1
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 1.8 Volts / If 0.35 Ampere / Direct / Battery = |
| Description |
Codex erroneously notes for the filament 2V, 0.1A; but the predecessor LT1 has the same filament data 1.8V, 0.35A.
Anode: 30 - 80 volts.
Production of these tubes was maintained well into the 1930s with a modern shape glass and base but maintaining the horizontal cylindrical form. This was one of the last types with this early structure.
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| Tube prices |
5 Tube prices (visible for members
only)
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| Information source |
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49
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Just Qvigstad
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DER: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):23
Collection of
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