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UX222

Information - Help 
ID = 3614
       
Country:
United States of America (USA)
Brand:
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to UX222 = 222 = OK-X-222 = CX322 = X222 = 4603_WLS = 57T222 = SX222 = TX-222 = NX-222 = RayX-222 = SLX222 = ER222 = RYB222 = T-22DC = NU-22 = X222RF = PM222
Similar Tubes
Normally replaceable-slightly different:
  22 ; 38002 ; 422 ; PT-222 ; RF22 ; SE-3222
First year Oct.1927 Saga of the Vacuum Tube, Tyne page 318 + Tube brochures collection E.Erb
First Source (s)
Feb.1927 : Saga of the Vacuum Tube, Tyne
Predecessor Tubes FE12  

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bu) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 0.13 Ampere / Direct / Battery =
Description

According to Tyne on page 318, extensive experimental work was done at GE during 1924 and 1925 and in July 1926 samples were submitted to RCA, which assigned the type UX222 in November 1926. Production was started at Nela Park and the UX222 was announced by RCA in October 1927. The thoriated filament takes 0.132 amperes at 3.3 volts. The maximum recommended anode voltage is 135 volts and with +45 volts on the screen grid and -1.5 volts on the inner grid, it is resulting a 1.5 milliampere anode current. The amplification factor is then 300 and the mutual conductance 350 micromhos.

 
Dimensions (WHD)
incl. pins / tip
x 123 x 45 mm / x 4.84 x 1.77 inch
Weight 49 g / 1.73 oz
Information source Saga of the Vacuum Tube, Tyne   p. 318 & 321
Tube Lore (II)   p. 26 & 30 & 214
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

440_6.png UX222: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
ux222_data.png
UX222: RCA Tube Manual RC-10
Heinz Höger

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Usage in Models 4= 1927? ; 1= 1927 ; 1= 1928? ; 10= 1928 ; 2= 1929? ; 22= 1929 ; 2= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):42

Collection of

 
screenshot_20221226_164917_gallery.jpg

UX222
 

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