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Country:
United States of America (USA)
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Brand:
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Common type USA tube/semicond.
Canadian Westinghouse, Hamilton
Cymotron サイモトロン (tubes) - see also Tokyo Electric Co. (TEC)
Amplion USA = Tube brand
Arco Tube Company; Newark (NJ)
Clover Battery Corp., Brooklyn, NY
JRC, Johnsonburg Radio Corporation; Johnsonburg, PA
Ken-Rad, The Kentucky Radio Corporation; Owensboro, KY
Meier and Frank Corporation; Portland, OR
OK (tubes), S.S. Kresge Co.; Detroit, MI
Schickerling Products Manufacturing Co.; Newark NJ
Usalite, United States Electric Manufacturing Corp.; New York, NY and Chicago, IL
Vox, Munder Electrical Co.; Springfield, MA
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| Developer: |
Westinghouse El. & Mfg. Co. - see also Canadian W. |
| Tube type: |
Triode, vacuum Universal |
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| Identical to |
UY227
= 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
= T-227
= EY227
= VY227
= PA227
= SLY227
= NU-27
= GSY227
= Y227AC
= Z-27
= MX227
= RYB227
= T27
= 227-C
= AX227
= LY227
= C227
= NY-227
= C-427
= F209
= UY627
= TS227
= C-27
= 227
= 27
= C327
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| Similar
Tubes |
Other shape (e.g. bulb type):
R227
Normally replaceable-slightly different:
102T_UY
; 127A
; 38027
; 4631_WLS
; A227
; AY227A
; CY227
; DE1_Arcturus
; FR-503
; K27
; N27
; N_CeCo
; SE-3373
; TB-605-A
; UY-27A_Japan
; UY-27B
; WLS527
Other class quality (otherwise equal):
NU-27S
Other characteristic (electr. data):
244A
Other base:
27_Coronet
; S27
; UX225
; UX225_5pin
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| First year |
Aug.1927
Saga of the Vacuum Tube, Tyne page 320
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| Predecessor Tubes |
UX225
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Successor Tubes
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24
224
SY224
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| Base |
UY-Base, 5 Pins (USA, April 1927)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.5 Volts / If 1.75 Ampere / Indirect / Specified voltage 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.
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Dimensions (WHD)
incl. pins / tip |
x 108 x 45 mm / x 4.25 x 1.77 inch |
| Weight |
49 g / 1.73 oz |
| Information source |
Tube Lore (II) #27 tube
Saga of the Vacuum Tube, Tyne p. 320-321 & 343 - 344
-- Collector info (Sammler)
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UY227: Suggested application of Audion 427 in DeForest Power Amplifier
Henry Boyars
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UY227: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
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Just Qvigstad
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UY227: RCA Tube Manual RC-10
Heinz Höger
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):347
Collection of
Collection of a member from FIN |
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