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ID = 22247
United States of America (USA)
Brand: Cunningham Inc., E.T.; Harrison (NJ)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to CX340 = ER240 = 440 = X240 = PA240 = 240 = MX240 = RayX-240 = TC240 = G_CeCo = SLX240 = UX240
Similar Tubes
Normally replaceable-slightly different:
  38040 ; CV2501 ; PJ-11 ; PT-240 ; SE-3720 ; VT-40 ; X140

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

This tube is a specially designed type for resistance coupled amplification. It has an amplifying factor about 4 times that of the CX301A (UX201A)

Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 47 g / 1.66 oz
Information source -- Collector info (Sammler)   

ux_base_standard~~23.png CX340: Fin Stewart
Fin Stewart

Just Qvigstad
CX340: Cunningham Radio Tubes Manual C-10 1932
Daniel Consales

More ...
Usage in Models 1= 1927? ; 1= 1927

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of



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