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ID = 49314
United States of America (USA)
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 2B7S = ER2B7 = G-2B7-S
Similar Tubes
Normally replaceable-slightly different:
  2B7 ; PH2B7

Base 7-Pin-Base U7A = small, old, USA Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC
Description Glass type used as combined detector, amplifier, and avc tube.

Which differences of characteristics between 2B7S and 2B7 ?

Babani's International Radio Tube Encylopedia gives somme different value as a 2B7, but Brans Vademecum 1945 and 1961 gives as electrical equivalent. The Majestic tube shield is metallised paint. Replacement tubes made by National Union, Raytheon and Sylvania utilised a sheet metal shield. 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 116 x 38 mm / x 4.57 x 1.50 inch
Weight 39 g / 1.38 oz
Information source Babani, International Radio Tube Encyclopaedia   
-- Collector info (Sammler)   

2b7~~3.png 2B7S: Fin Stewart
Fin Stewart

Just Qvigstad
2B7S: Babani 1949-1951
Patrice Zeissloff


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