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40

Information - Help 
ID = 5767
       
Country:
United States of America (USA)
Brand:
Tube type:  Triode, vacuum 
Identical to 40 = X140 = ER240 = 240 = 440 = PA240 = VT-40
Similar Tubes
Normally replaceable-slightly different:
  38040
Other class quality (otherwise equal):
  CV2501
First Source (s)
1927 : -- Collector info (Sammler)

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Description High mu triode, mu 30. 
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)

40.png
40: Internet
Miguel Angel Trujillo-Rodriguez

171_14.png 40: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
40.png
40: Raytheon Databook 1937
Emilio Ciardiello

Usage in Models 3= 1928 ; 1= 1929 ; 1= 1933??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of

 
rca_40_front.jpg

 

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