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W443_4pin

Information - Help 
ID = 21043
       
Country:
Netherlands
Brand: Longlife, the Hague
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to W443_4pin = RES174d = B443_4pin
Similar Tubes
Other base:
  W443
Production stop Feb.1938

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Description The "Röhren-codex" lists this tube as a Thermion tube, but the brand is Longlife. The type on the picture is a Longlife Superior type W443. 
Information source - - Manufacturers Literature   Sept. 1935
 
w443superior.jpg
W443_4pin
Peter den Boer

 
w4434pin_so.png
W443_4pin: rtt
Michael Schlör

 

from Just Qvigstad


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