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Fleming_Oscillation

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ID = 19357
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Developer: Fleming - valves; GB 
Tube type:  SINGLE-DIODE-TUBE (no details yet)   Detector 
  <1925 very rare. ***
Identical to Fleming_Oscillation
Similar Tubes
Other base:
  Fleming_134R
First year 1906 -- Collector info (Sammler)
First Source (s)
1906 : Saga of the Vacuum Tube, Tyne Picture page 47
Base Edison medium E14 = 14 mm, mignon Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.6 Ampere / Direct / Battery =
Description

Etched with: Royal Ediswan, below "Fleming Oscillation Valve", below 4 Volts. The Fleming valves were made by the Edison and Swan United Electric Light Co. and marketed by Marconi Wireless telegraph Co. Ltd. Ref. Catalogue Marconi Wireless Telegraph Co, about 1910. The catalogue number is 134R. The tube has a tungsten filament

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 42 x 82 x 32 mm / 1.65 x 3.23 x 1.26 inch
Weight 16 g / 0.56 oz
Information source British Radio Valves - The Vintage Years: 1904-1925   p. 10
circuit.png
Fleming_Oscillation
Peter den Boer † 2025

Just Qvigstad 		flemingdata.png
Fleming_Oscillation: own collection
Peter den Boer † 2025
Usage in Models 1= 1912?? ; 1= 1913??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

Fin Stewart (AUS)
Ernst Erb (CH)
Collection of a member from D
 
ediswan_fleming_oscillation1.jpg

Fleming_Oscillation
 

Variants

Because of the effects of nearby electrically charged bodies on the action of the valves, it was sometimes necessary to shield them by a covering of copper gauze which was grounded. "Saga of the Vacuum Tube" page 47.
Bei dieser Röhre handelt es sich um eine Repro, vermutlich um 1950. Herkunft ist leider unbekannt.
Sockel: E27. Länge gesamt: 130 mm, Durchmesser: 45 mm. Quelle: Australischer Sammler
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