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DD4

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ID = 6614
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Double Diode   Detector 
Identical to DD4
Similar Tubes
Normally replaceable-slightly different:
  2D4A ; CV1170
First Source (s)
1934 : History of the British Radio Valve to 1940 p.137 &177

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=N) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.75 Ampere / Indirect / Specified voltage AC/DC
Description

The Tungram version is listed as having a 0.65A heater current against the Cossor version with 0.75A.

 
Dimensions (WHD)
incl. pins / tip
x 88 x 33 mm / x 3.46 x 1.30 inch
Weight 30 g / 1.06 oz
Information source Babani, International Radio Tube Encyclopaedia   p. 94 & 95
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 73, p. 100
Taschenbuch zum Röhren-Codex 1948/49

125_6.png DD4: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 1= 1934 ; 4= 1935 ; 1= 1936?? ; 1= 1938?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):7

Collection of

 
dd4.jpg

DD4
 

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