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WR1

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ID = 28917
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Developer: Cossor, A.C.; London 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to WR1
Similar Tubes
Other characteristic (electr. data):
  WR2
Heater different:
  W1_Cossor
First year May.1925 Saga of the Vacuum Tube, Tyne page 375, 376
First Source (s)
1925 : British Radio Valves - The Vintage Years: 1904-1925 p.49
Predecessor Tubes A_Cossor  
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.3 Ampere
Description

Corresponds to W1. An 8 ohm series resistor allowes to operate from 4 to 6 volt supply; if shortened by a thumbscrew the tube could be used with 2 volt L.T.

 
Information source Saga of the Vacuum Tube, Tyne   1925 Brown Brothers Catalog 217
b4_base_pins~~195.png WR1: Fin Stewart
Fin Stewart

Just Qvigstad 		wr1_spec.png
WR1: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector
More ...

Collection of

Federico Rubio-Moratalla (E)
 
wr1.jpg

 
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