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RES374

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ID = 513
       
Country:
Germany
Brand: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Tube type:  Vacuum Pentode   Power/Output 
Identical to RES374 = C443N = PP431 = L427D
Similar Tubes
Normally replaceable-slightly different:
  D70 ; DP3 ; M704 ; UP4C ; W506
Heater different:
  IT103
First year 1931 Tube leaflet collection E.Erb Analysis by original leaflets
Predecessor Tubes PP430  
Successor Tubes 1933   RES964  

Base Europe 5-Pin (O5A, B5) (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Parallel, (AC/DC)
Description

About 1930 the C443 was replaced by the C443N, which was capable of slightly increasing the output power from 2,8 to 3 Watts but associated by increasing the grid bias from -25 to -42 Volts. [Jacob Roschÿ, 2003-01-17]

 
Text in other languages (may differ)
Tube prices 4 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
res374_telefunken.jpg
RES374
Anonymous 557 Collector

 
4_43.png
RES374: Telefunken Werkstattbuch
Wolfgang Bauer

 
res374_spec.png
RES374: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1931? ; 10= 1931 ; 1= 1932?? ; 15= 1932? ; 76= 1932 ; 2= 1933?? ; 9= 1933? ; 26= 1933 ; 2= 1934? ; 5= 1934 ; 1= 1935? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):149


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