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D4

Information - Help 
ID = 12639
       
Country:
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Triode, vacuum 
Identical to D4 = REN904
Similar Tubes
Normally replaceable-slightly different:
  4GPAC ; A30D ; ACHL ; CV1037 ; HLA2 ; MH4
Heater different:
  354V

Base Europe 5-Pin (O5A, B5) (Codex=Eu)
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description

Typ:- Va 200; Ia 4mA; Vg -3.0; Ra 12,500; gm 3.3 mA/V

Known brands are Ferranti and Cossor.

 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
7_97.png
D4: Telefunken Werkstattbuch
Wolfgang Bauer

 

Usage in Models 1= 1932 ; 2= 1933 ; 1= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

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