Radios antiguas y Radios de Colección
Four-In-One-3
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País:
Gran Bretaña (GB)
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| Idéntica a |
Four-In-One-3
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| Base |
SPECIAL TUBEBASE in general
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| Filamento |
If 0.5 Ampere / Direct / Battery = |
| Descripción |
Quadruple Valve Co., Ltd., Nottingham has built the "Four-in one" valve in 1929. There were found at least two versions, one with the 4 horizontal triodes mounted in parallel as shown in the patent GB 280,258 and the other in a square formation. They have a total plate current of 8 mA at 80 - 120 V. A scaled-down version with three triodes is also known. This page is for that version - with the same slide-top carton but marked as 3. See "Tube Collector" 13/3, June 2011 on page 13 with further references - also to pictures. See also the German "Polytron-4fach" from 1927 (Dr. G.O. Spanner GmbH).
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