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440

Information - Help 
ID = 13566
       
Country:
United States of America (USA)
Brand:
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 very rare. ***
Identical to 440 = UX240 = CX340 = 40 = MX240 = ER240 = X240 = PA240 = 240

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

The amplification factor of this tube was 30 - four times that of the UX201A. It was specifically desigbed for resistance-capacitance coupled amplification. a 250000 ohm coupling resistor was used in the anode circuit of the tube.

 
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 Taschenbuch zum Röhren-Codex 1948/49   
Saga of the Vacuum Tube, Tyne   Pages 317 & 318
 
s_217_g_27.gif
440: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

 

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