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VL4

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ID = 238
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Developer: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH 
Tube type:  Beam Power Tube   Power/Output 
Identical to VL4
Similar Tubes
Heater different:
  CL4
First year Jul.1938 Tube leaflet collection E.Erb Analysis by original leaflets (V7)
First Source (s)
Nov.1938 : Funk 1938 #21
Predecessor Tubes VL1  

Base Europe side contact P8A (Au P, 8SC) (Codex=Sfo) Top contact with a cap.
Filament Vf 110 Volts / If 0.05 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 5 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   

vl4_schaltungsumgebung.png
VL4: Rundfunkröhren 3. Auflage 1938
Günter Kudicke

26_12.png VL4: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
vl4_spec.png
VL4: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

More ...
Usage in Models 9= 1938 ; 1= 1939?? ; 6= 1939

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):16


Collection of

 
vl4_112r.jpg

VL4
 

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