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2B7

Information - Help 
ID = 2961
       
Country:
United States of America (USA)
Brand:
Tube type:  Double Diode-Pentode   Universal   Controlling (mu) 
Identical to 2B7 = Ut2B7 = ER2B7 = PH2B7 = VT157_GPO = CV1706 = NU-2B7
Similar Tubes
Other shape (e.g. bulb type):
  G-2B7-S
Normally replaceable-slightly different:
  2B7EE ; 2B7S
Heater different:
  6B7
Other base and other heater:
  6B8G
First Source (s)
1933 : The AWA Journal Vol. 7
Successor Tubes 6B8   6B8G  

Base 7-Pin-Base U7A = small, old, USA (Codex=Mb) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 0.8 Ampere / Indirect / Parallel, (AC/DC)
Description

Glass type used as combined detector, amplifier, and avc tube.

 
Dimensions (WHD)
incl. pins / tip
x 116 x 38 mm / x 4.57 x 1.50 inch
Weight 39 g / 1.38 oz
Tube prices 2 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  2b7_schaltbild01.png
  2B7: Cunningham Radiotron Manual
Peter Hoddow
 
2b7_157_rn.jpg
2B7: Collection JR
Jacob Roschy

 
488.png
2B7: Telefunken Werkstattbuch
Wolfgang Bauer

 
2b7_techdat01.png
2B7: Cunningham Radiotron Manual
Peter Hoddow


Usage in Models 1= 1932? ; 4= 1932 ; 1= 1933?? ; 13= 1933? ; 103= 1933 ; 5= 1934?? ; 20= 1934? ; 89= 1934 ; 8= 1935?? ; 10= 1935? ; 46= 1935 ; 2= 1936?? ; 2= 1936? ; 14= 1936 ; 2= 1937 ; 5= 1939 ; 1= 1940?? ; 2= 1940 ; 1= 1944 ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):330


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