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ID = 50043
United States of America (USA)
Brand: Bell Labs; Murray Hill, NJ.
Tube type:  Thyratron Cold-cathode 
Identical to WW313A
First year 1938 Wireless World (The), London (WW, 79)

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament No heater

Cold cathode tube devised for remote control in telephone systems.

Made available for use as remote control systems for radio receivers using an RF carrier via mains-borne signals.


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