Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 25391
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Universal 
Identical to 231D = CV2584
Similar Tubes
Normally replaceable-slightly different:
Other characteristic (electr. data):
  UX-199_code9 ; UX199
Other base:
  257A ; D-87722
First Source (s)
1926 : Saga of the Vacuum Tube, Tyne

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 3.1 Volts / If 0.06 Ampere / Direct / Battery =

Receiving triode, T8 bulb on four pin base wired like UX-199. Mu = 8.5, Gm 0.38 to 0.56mS. 4000 hours life expectancy; controlled microphonics. Grid and filament spring supported by glass bead from top of plate. Developed for Northern Electric as improved UX-199.

Dimensions (WHD)
incl. pins / tip
x 90 x 25 mm / x 3.54 x 0.98 inch
Weight 29 g / 1.02 oz
Information source Babani, International Radio Tube Encyclopaedia   p. 30 & 31
Tube Lore (I)   
Tube Lore (II)

231ds.gif 231D: KoBi
Konrad Birkner † 12.08.2014

More ...

Just Qvigstad
231D: KoBi
Konrad Birkner † 12.08.2014

More ...
Usage in Models 1= 1929??

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

Collection of



You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information