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ID = 81997
United States of America (USA)
Brand: GEM Tube Co.; New York City, NY
Tube type:  Triode, vacuum   Power/Output 
Identical to R.201A

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =

This tube is specially designed for resistance coupled amplifiers.

Information source -- Collector info (Sammler)   

ux_base_standard~~254.png R.201A: Fin Stewart
Fin Stewart

Just Qvigstad

Collection of



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