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REN904 Info
Country:  Germany      Brand:  Telefunken Deutschland (TFK) 
  Tube type:  Triode, vacuum   Universal 
Tube ID = 499
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Identical to REN904 = 41MHF = RV4100 = 354V = MH4 = DW4011 = RS4324 = TL425 = A4110 = AG495 = A430N = TE24 = 70504 = E428 = WG43 = D4 = ND4_Orion = 904 = 105 = E424N = A4D1 = WE27 = CI424 = LA203
Similar Tubes AG495_4pin (other base)   VT132_TKD (Multiple differences or of other kind)   REN1821 (Heater different)   K1694 (can normally be replaced - small diff'ce)   4A120 (can normally be replaced - small diff'ce)   NU41 (can normally be replaced - small diff'ce)   WG42 (can normally be replaced - small diff'ce)   KL70504 (can normally be replaced - small diff'ce)   E424 (can normally be replaced - small diff'ce)   AR4101 (other characteristic (electr. data))  
First Series   1930 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) Apr.1930 : -- Original-techn. papers. ÖRA Folge 4
1930 : Katalog Prohaska 1930/31 (dick)
Predecessor Tubes REN1004   REN1104  
Successor Tubes 1935 AC2  

Base Europe 5-Pin (O5A, B5) (Codex=F)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 1 Ampere / Vf 4 Volts /
Description Im Prohaska-Katalog 1930/31 wird sie erstmals angeboten. Als Ersatz für REN1004 und REN1104 empfohlen und verwendet, weshalb sie oft als Gerätebestückung in Unterlagen auftaucht (obwohl nicht Originalbestückung). Das war aber wichtig für den Service. 
Text in other languages (may differ)
Tube prices 6 Tube prices (visible for members only)
Literature Radios von gestern   Seite 243 Vergleichstabelle
Taschenbuch zum Röhren-Codex 1948/49   page462
Saga of the Vacuumtube, Tyne

  ren904.gif
  Reparatur-Praktikum von Kappelmayer
Egon Strampe
ren904_telefunken.jpg
JK Jörg Kulbe
Jörg Kulbe

 
ren904.gif
JK Prüfkarte Röhrenprüfgerät W 18N
Jörg Kulbe

 
ren904_spec.png
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models   3= 1928?? ; 3= 1928? ; 23= 1928 ; 1= 1929?? ; 46= 1929? ; 86= 1929 ; 5= 1930?? ; 40= 1930? ; 87= 1930 ; 2= 1931?? ; 11= 1931? ; 122= 1931 ; 5= 1932?? ; 28= 1932? ; 113= 1932 ; 4= 1933?? ; 16= 1933? ; 60= 1933 ; 2= 1934? ; 12= 1934 ; 6= 1935?? ; 4= 1935? ; 16= 1935 ; 3= 1936?? ; 3= 1936? ; 20= 1936 ; 1= 1937?? ; 1= 1937? ; 19= 1937 ; 1= 1938?? ; 3= 1938? ; 6= 1938 ; 1= 1939?? ; 1= 1939 ; 4= 1940?? ; 2= 1945 ; 10= 1946 ;
Number of Models with this tube   792
No further Information for

REN904    

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