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ID = 56147
United States of America (USA)
Brand: Majestic tubes of Grigsby-Grunow
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to G-2B7-S = Ut-2B7 = PH2B7 = 2B7S = VT157_GPO = CV1706
Similar Tubes
Other shape (e.g. bulb type):
  2B7 ; ER2B7 ; Ut2B7
Normally replaceable-slightly different:
Heater different:

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 With sprayed metal shield - referred to as "other bulb shape" in "similar tubes" 
Dimensions (WHD)
incl. pins / tip
x 116 x 38 mm / x 4.57 x 1.50 inch
Weight 39 g / 1.38 oz

2b7~~2.png G-2B7-S: Fin Stewart
Fin Stewart

Just Qvigstad

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