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ID = 1806
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Double Diode-Pentode   Power/Output 
Identical to ABL1 = WE41 = TABL1
Similar Tubes
Heater different:
Other base:
  DDPP4M ; Pen4DD
Other base and data slightly different:
First year 1937 Tube leaflet collection E.Erb *Analysis by original leaflets
First Source (s)
Nov.1938 : Funk 1938 #21
Feb.1937 : L'Histoire Singulière du Tube Radio; G. Duperray 2009
Successor Tubes 1941   EBL21  

Base Europe side contact P8A (Au P, 8SC) (Codex=Sa) Top contact with a cap.
Filament Vf 4 Volts / If 2.4 Ampere / Indirect / Specified voltage AC/DC

The ABL1 is an AL4 extended by two signal diodes.It was used in simple superhets without audio pre stage where the output section was directly driven from the diode detector, or in sets where the audio pre stage was combined with the tuning eye (EFM11, AM2) or in the 3-diode- circuit together with the ABC1.[Jacob Roschÿ, 25Mar2003]

Text in other languages (may differ)
Tube prices 8 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   Philips-Archiv = September 1937

ABL1: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
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au35~~2.png ABL1: RTT 1974 (Franzis) 13. Auflage
Martin Renz

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Just Qvigstad
ABL1: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

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Usage in Models 3= 1937?? ; 5= 1937? ; 25= 1937 ; 1= 1938?? ; 4= 1938? ; 23= 1938 ; 1= 1939? ; 7= 1939 ; 1= 1940

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):70

Collection of



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