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ECH33

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ID = 2491
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode-Heptode   Controlling (mu) 
Identical to ECH33 = X147 = OM10 = ECH3G
Similar Tubes
Heater different:
  ECH35
Other base:
  ECH3
Multiple differences or of other kind:
  6E8G
First year 1940 -- Collector info (Sammler)
First Source (s)
1940 : -- Schematic and Bush Catalogue
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ua)
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
ech33.png
ECH33: Internet
Miguel Angel Trujillo-Rodriguez
oc24_1~~8.png ECH33: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad 		ech33_cch35_ech36_a4.png
ECH33: Maintenance Manual Mullard 1952
Adrian Riesen
More ...
Usage in Models 2= 1939 ; 10= 1940 ; 1= 1945?? ; 1= 1945 ; 2= 1946 ; 1= 1947?? ; 3= 1947? ; 3= 1947 ; 4= 1948? ; 15= 1948 ; 2= 1949? ; 14= 1949 ; 2= 1950?? ; 1= 1950? ; 4= 1950 ; 2= 1951? ; 11= 1951 ; 4= 1952 ; 1= 1953? ; 1= 1961?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):84

Collection of

Jacob Roschy (D)
Tomasz Szczesniak (PL)
 
ech33_az_r2.jpg

ECH33
 
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