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ID = 79671
Tube type:  Damper, booster, flyback diode 
Identical to 19AU4A = 19AU4GTA

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 18.9 Volts / If 0.6 Ampere / Indirect / Series, AC/DC

This tube is (so far) only to be found in one circuit diagram. Maybe that's the 19AU4GTA tube.

Text in other languages (may differ)
Literature -- Schematic   
  19AU4A: schematic
Anonymous 15 Collector

Usage in Models 3= 1957?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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