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FE3_MO

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ID = 28565
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Space Charge Tetrode   Text 
  <1925 very rare. ***
Identical to FE3_MO
Similar Tubes
Heater different:
  DE7
First year 1925 Saga of the Vacuum Tube, Tyne page 382, 383, 385
First Source (s)
1924 : British Radio Valves - The Vintage Years: 1904-1925 p.67
Predecessor Tubes FE1_MO  
Successor Tubes DE7  
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.7 Ampere / Direct / Battery =
Description

Anode 6-20 V. Inner grid 6-15 V. For special circuits. For H.T.less circuits, e.g.in Unidyne receivers.

 
Dimensions (WHD)
incl. pins / tip		 45 x 115 x mm / 1.77 x 4.53 x inch
Information source Saga of the Vacuum Tube, Tyne   1925 Brown Brothers Catalog 217
- - Manufacturers Literature   1924
b4_tetrode~~6.gif FE3_MO: Fin Stewart
Fin Stewart

Just Qvigstad 		fe3_spec.png
FE3_MO: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector
More ...
 
fe3.jpg

 
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