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UY227

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ID = 4015
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
Identical to UY227 = 227 = 27 = C327 = AY225 = AY227 = P227_USA = PH227 = F209A = 127 = G-27 = PU027 = 427 = GY227 = UY-227_Japan = 57T227 = 227E = X-227 = D227 = ER227 = AGX2270 = DE-1 = ARX2270 = LS227 = Y227 = PA227 = NY227 = NU-27 = GSY227 = C227
Similar Tubes
Normally replaceable-slightly different:
  127A ; 4631_WLS ; N_CeCo ; WLS527
Other class quality (otherwise equal):
  NU-27S
Other characteristic (electr. data):
  244A
Other base:
  27_Coronet ; S27 ; UX225
First year Aug.1927 Saga of the Vacuumtube, Tyne page 320
Predecessor Tubes UX225  
Successor Tubes 24   224   SY224  

Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Parallel, (AC/DC)
Description Tyne page 319ff: H.W. Freeman, of Westinghouse Electric & Manufacturing Company, in an article published in December 1922, described an indirectly heated cathode tube which was double ended. A.M. Nicolson, of Western Electric, constructed indirectly heated cathode tubes in 1914 (see Chapter 6). In July 1925 samples of Freeman's tube were submitted to RCA. In April 1926 more samples were obtained. In June 1926 the designation UC225 was assigned to this tube, and RCA placed orders for 1000 tubes at each of the three tube factories. During November Westinghouse suggested the use of a five-pin base to eliminate the necessity for the adopted for detector applications, and the five-pin base was aproved. With the adoption of this base the desigantion UX225 was changed to AY225 and then for commercial reasons to AY227, and finally to UY227. On May 21, 1927, the UY227 was announced in New York newspapers. ... The first UY227s had sheet-metal anodes and were subject to grid emission difficulties. Westinghouse engineers suggested that the use of a mesh anode would eliminate this trouble, and the change was soon made. Shipments to RCA began early in the Summer of 1927. 
Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 49 g / 1.73 oz
  audion_427_circuit.png
  UY227: Suggested application of Audion 427 in DeForest Power Amplifier
Henry Boyars
 
uy227_5.jpg
UY227: RFJ
Roy Johnson

 
s_223_g_20.gif
UY227: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 
uy227_data.png
UY227: RCA Tube Manual RC-10
Heinz Höger


Usage in Models 2= 1927? ; 22= 1927 ; 1= 1928?? ; 2= 1928? ; 97= 1928 ; 1= 1929?? ; 15= 1929? ; 103= 1929 ; 1= 1930?? ; 10= 1930? ; 27= 1930 ; 1= 1931?? ; 3= 1931? ; 36= 1931 ; 1= 1932? ; 3= 1932 ; 6= 1933? ; 1= 1933

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):332



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