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EF21

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ID = 56431
       
 
   
Tube type:  Vacuum Pentode   Universal 
Identical to EF21
Similar Tubes
Other base:
  EF21_9pin ; EF6

Base Loctal-8, B8G (Sylvania, 1938)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Description Produced by Telam, PL The Philips 21- "Key Base" tubes were initially designed in 1940 with the 9-pin base B9G like the EF50. The later series production from 1942 on however was changed to the 8-pin Locktal-base B8G designed by Sylvania. 
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Tube prices 6 Tube prices (visible for members only)

ef22_sock~~2.png EF21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Just Qvigstad
ef21data1.png
EF21: own collection
Peter den Boer

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Usage in Models 1= 1951? ; 1= 1952?? ; 1= 1966??

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

Collection of

 
ef21.jpeg

 

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