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ECH2

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ID = 2490
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode-Heptode   Frequency converter   Controlling (mu) 
Identical to ECH2
Similar Tubes
Heater different:
  CCH2
Heater and shape different:
  ECH2_Tungsram
Other base and other heater:
  TH4B
First year 1938 -- Collector info (Sammler) HBV
First Source (s)
05.Oct.1938 : Philips Bulletin
26.May.1938 : Wireless Magazine
Predecessor Tubes EK2  
Successor Tubes 1939   ECH3   ECH4  
Base Europe side contact P8A (Au P, 8SC) (Codex=Sao) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.95 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
ech2_sock.png ECH2: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Just Qvigstad 		ech2_data_tungsram.png
ECH2: Memento Tungsram Vol. 4
Jacob Roschy
More ...
Usage in Models 1= 1938? ; 7= 1938 ; 17= 1939 ; 7= 1940
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):32

Collection of

Roy Johnson (GB)
Rudolf Osterkamp (D)
Robert Gillespie (USA)
 
ech2.jpg

ECH2
 
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