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ECH4 Info
Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands 
  Developer:  Philips; - Eindhoven; Netherlands 
  Tube type:  Triode-Heptode   Frequency converter   Controlling (mu) 
Tube ID = 279
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Identical to ECH4
Similar Tubes ECH21 (other base)   ECH4G (other base)   ECH34 (other base)   E1R (Heater different)   ECH4A (other base)   ACH1n (Heater different)   ECH4N (other shape (e.g. bulb, size))  
First Series   Jan.1940 Tube leaflet collection E.Erb Philips-Archive
First Source (s) Jan.1940 : -- Original-techn. papers.
Predecessor Tubes ECH3  
Successor Tubes 1941 ECH21   ECH41  

Base Europe side contact base P (P8A) (Codex=Sak)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 0.35 Ampere / Vf 6.3 Volts /
Tube prices 0 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ech4.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
ech4_pmw_rd1_r.jpg
Collection JR
Jacob Roschy

 
au46.png
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
daten_ech4.png
g.h.
Gerhard Heigl

Usage in Models   1= 1939?? ; 13= 1940?? ; 9= 1940? ; 37= 1940 ; 2= 1941?? ; 8= 1941? ; 120= 1941 ; 8= 1942?? ; 2= 1942? ; 64= 1942 ; 7= 1943?? ; 2= 1943? ; 54= 1943 ; 2= 1944?? ; 2= 1944? ; 22= 1944 ; 11= 1945?? ; 3= 1945? ; 27= 1945 ; 16= 1946?? ; 2= 1946? ; 40= 1946 ; 19= 1947?? ; 8= 1947? ; 74= 1947 ; 38= 1948?? ; 11= 1948? ; 117= 1948 ; 16= 1949?? ; 4= 1949? ; 113= 1949 ; 22= 1950?? ; 2= 1950? ; 54= 1950 ; 4= 1951?? ; 8= 1951 ;
Number of Models with this tube   959
No further Information for

ECH4    

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