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G-2A7-S

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ID = 56112
       
Country:
United States of America (USA)
Brand: Majestic tubes of Grigsby-Grunow
Tube type:  Pentagrid-Converter (Heptode)   Frequency converter   Controlling (mu) 
Identical to G-2A7-S
Similar Tubes
Other shape (e.g. bulb type):
  2A7 ; 2A7S ; CV787 ; ER2A7 ; PH2A7 ; Ut-2A7
Other class quality (otherwise equal):
  NU-2A7S

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
Information source -- Collector info (Sammler)   
70 Years of Radiotubes and V.   p. 180

2a7_6a7~~4.png G-2A7-S: Fin Stewart
Fin Stewart


Just Qvigstad
Usage in Models 1= 1933?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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