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ID = 67157
United States of America (USA)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Screen-grid Tetrode 
  Ca. 1925 up to 1945 rare.
Identical to 4603_WLS = UX222 = CX322

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Filament Vf 3.3 Volts / If 0.132 Ampere / Direct / Specified voltage AC/DC

Page 671 of the Fall 1928 issue of the Sears Roebuck catalog announces a new catalog number series for radio tubes. 46XX, replacing the 29XX series. The 4603_WLS is shown as being equivalent to the UX222 tetrode. This tube is also listed in the Spring 1929 catalog. According to Tynes' "Saga of the vacuum Tube", page 318 the tube is screened by an additional grid around the anode, which reduces feedback. This grid is connected to the top cap.

Dimensions (WHD)
incl. pins / tip
x 123 x 45 mm / x 4.84 x 1.77 inch
Weight 48 g / 1.69 oz
Information source Tube Lore (I)   page 16.
Sears, Roebuck Catalogs (Silvertone)   Page 671, Fall issue 1928
4603_WLS: Fin Stewart
Fin Stewart


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