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C443

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ID = 2749
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   Power/Output 
Identical to C443 = RES364 = L425D = DW3 = PP430 = C453 = TC43 = RS4343 = TU430 = 4A4_Ultron
Similar Tubes
Normally replaceable-slightly different:
  4B4_Ultron ; BF100_Cyrnos ; D100N ; DP3 ; M43 ; PT425_5pin ; R89 ; T55_Adzam ; TV425 ; TW425 ; UP4C ; V453
Other class quality (otherwise equal):
  C443NA
Heater different:
  IT103
Other base:
  C443_4pin ; C443_UY
Multiple differences or of other kind:
  IP3
First year 1928 -- Collector info (Sammler)
First Source (s)
Nov.1928 : - - Manufacturers Literature
Predecessor Tubes B443  
Successor Tubes C443N  

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

The C443 was designed for AC mains operation only, it is capable of about twice the output power of the former B443. The equivalent types RES364, L425D and PP430 appeared considerably later. [Jacob Roschÿ, 2003-01-17]

The original C443 had an amplification factor of 43, the C453 had an amplification factor of 53. When an amateur in 1932 replaced a good C443 for the new C453 in order to enhance performance of his radio, nothing changed. When he scratched some paint of the top of his new C453, he saw C443 appear. There was a lot of fuss about this matter. At the end Philips apologized for redesignating a batch of C443 into C453. As for defence they stated that the C443 was that much improved, that it in fact became a new type, the C453. There was also a similar case with redesignated 506's into 1823.

Vg1: -25V

Vg2: 200V

Va: 300V

 
Text in other languages (may differ)
Tube prices 6 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  c443.gif
  C443: ficha de valvulas
Getulio Jimenez-Gomez
 
ph_c443_1_1.jpg
C443: From my own collection
Ernst Rykkje

 
4_5.png
C443: Telefunken Werkstattbuch
Wolfgang Bauer

 
daten_c443_philips.png
C443: g.h.
Gerhard Heigl


Usage in Models 5= 1928 ; 3= 1929?? ; 1= 1929? ; 14= 1929 ; 7= 1930? ; 41= 1930 ; 1= 1931?? ; 9= 1931? ; 69= 1931 ; 3= 1932?? ; 2= 1932? ; 61= 1932 ; 2= 1933?? ; 13= 1933? ; 26= 1933 ; 12= 1934 ; 1= 1935?? ; 3= 1935? ; 4= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):277


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