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244A

Information - Help 
ID = 25392
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Triode, vacuum   Audio Frequency 
Identical to 244A = MY227
Similar Tubes
Other characteristic (electr. data):
  UY227
Other base and data slightly different:
  247A
First Source (s)
1929 : Saga of the Vacuum Tube, Tyne
Successor Tubes 285A  

Base UY-Base, 5 Pins (USA, April 1927)
Filament Vf 2 Volts / If 1.6 Ampere / Indirect / Parallel, (AC/DC)
Description

Mu 10, Gm 0.5 to 1.2mS; low microphonics and sputter noise. Intended for low-level audio preamplifier applications.
Improved, low-noise substitution for UY227.

 
Literature Babani, International Radio Tube Encyclopaedia   W.E.Greybar catalog 1933
- - Manufacturers Literature   
Tube Lore (I)
 
244ab.gif
244A: KoBi
Konrad Birkner † 12.08.2014

 
244as.gif
244A: KoBi
Konrad Birkner † 12.08.2014

 
244ad.png
244A: KoBi
Konrad Birkner † 12.08.2014


Usage in Models 1= 1928?

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


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