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DD4

Information - Help 
ID = 6614
       
Country:
Europe
Brand: Common type Europe tube/semicond.
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.177

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=N)
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.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
dd4.jpg
DD4: own collection
John Koster

 
125_6.png
DD4: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 1= 1934 ; 4= 1935 ; 1= 1936??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6


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