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Four-In-One-3

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ID = 52458
       
Country:
Great Britain (UK)
Brand: Quadruple Valve Co., Ltd., Nottingham
Developer: Quadruple Valve Co., Ltd., Nottingham 
Tube type:  Triple Triode   Universal 
  Late but very rare. ***
Identical to Four-In-One-3

Base SPECIAL TUBEBASE in general
Filament If 0.5 Ampere / Direct / Battery =
Description 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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