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ID = 77508
United States of America (USA)
Brand: National Union Radio Corp.; Orange (NJ)
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to NU-57S
Similar Tubes
Other class quality (otherwise equal):
  57 ; G-57-S

Base 6-Pin-Base U6A, old, USA Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description This tube fitted with a metal shield over the bulb 
Dimensions (WHD)
incl. pins / tip
x 119 x 42 mm / x 4.69 x 1.65 inch
Weight 43 g / 1.52 oz
Information source -- Original prospect or advert   Shapleigh Hardware Co St Louis catalogue 1935
NU-57S: Eigene Sammlung
Aldo Patriarca

NU-57S: Fin Stewart
Fin Stewart


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