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R31

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ID = 16245
       
Country:
France
Brand: La Radiotechnique (RT); Paris, Suresnes
Tube type:  Triode, vacuum   Power/Output 
  <1925 rare.
Identical to R31
First year 1924 Saga of the Vacuumtube, Tyne page 402

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 3.5 Volts / If 0.08 Ampere / Direct / Battery =
Description

The brand is Radiotechnique. The name of the tube is Radio-Watt R31.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
52 x 125 x mm / 2.05 x 4.92 x inch
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1924
 
r31tubesmall.jpg
R31: own collection
Peter den Boer

 
r31_spec.png
R31: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


Usage in Models 2= 1923 ; 1= 1924?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3


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