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R221-DX

Information - Help 
ID = 50707
       
Country:
Canada
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 =
 
can_northern_electric_r221_dx_tube.jpg
R221-DX: own collection
Lindsay Shepherd

 
ux_base_standard~~97.png
R221-DX: Fin Stewart
Fin Stewart

 

Usage in Models 1= 1925

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


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