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ID = 8668
United States of America (USA)
Brand: Majestic tubes of Grigsby-Grunow
Tube type:  Pentagrid-Converter (Heptode)   Frequency converter 
Identical to G-6A7-S
Similar Tubes
Other shape (e.g. bulb type):
  6A7 ; 6A7E ; CV1870 ; G-6A7 ; Ut-6A7 ; Ut6A7
Other class quality (otherwise equal):
  NU-6A7 ; NU-6A7S

Base 7-Pin-Base U7A = small, old, USA (Codex=Mh) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current 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 Taschenbuch zum Röhren-Codex 1948/49   

g6a7s_so.png G-6A7-S: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad

Collection of



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