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ID = 3555
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Triode 
Identical to DBC21
Similar Tubes
Other base:
  DBC21_9pin ; DBC25 ; DBC25_Miniloktal
First year Jul.1940 Tube leaflet collection E.Erb Philips Book III [178]
First Source (s)
Mar.1940 : Philips Bulletin # D 78
Predecessor Tubes KBC1   DBC21_9pin  
Successor Tubes DBC25  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vp)
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct
Tube prices 3 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
  DBC21: Internet
Miguel Angel Trujillo-Rodriguez
DBC21: Own collection
Valery Gromov

DBC21: Telefunken Werkstattbuch
Wolfgang Bauer

DBC21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

from Just Qvigstad

Usage in Models 1= 1940? ; 2= 1940 ; 6= 1941 ; 1= 1942? ; 8= 1942 ; 1= 1943?? ; 2= 1943 ; 4= 1944 ; 2= 1945

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):27

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