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4020C

Information - Help 
ID = 61505
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 very rare. ***
Identical to 4020C
Base UV-Base (4 Pins+Bayonet, USA 1914 WE) Top contact with a cap.
Was used by Telephony
Filament Vf 2 Volts / If 0.25 Ampere / Direct
Description

telephone repeater tube designed for DC series or parallel operation. Grid from top cap.

 
Dimensions (WHD)
incl. pins / tip		 57 x 127 x mm / 2.24 x 5.00 x inch
Weight 65 g / 2.29 oz
Information source - - Manufacturers Literature   
4020c.png 4020C: Fin Stewart
Fin Stewart

Just Qvigstad 		4020_c_characteristics.png
4020C: My schematic collection.
Pier Antonio Aluffi
 
You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
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