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ID = 50707
Brand: Northern Electric Co. Ltd.; Canada
Tube type:  Triode, vacuum   Universal 
Identical to R221-DX = UX201A
Similar Tubes
Other base:
  R221-D ; UV201A
Predecessor Tubes R221-D   UV201A  

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 =
R221-DX: own collection
Lindsay Shepherd

R221-DX: Fin Stewart
Fin Stewart


Usage in Models 1= 1925

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

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