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ID = 72313
United States of America (USA)
Brand: Arcturus Radio Tube Co.; Newark, NJ
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 122AC = AC22 = 222AC = 124 = UY224 = C324
Successor Tubes 1929   UY224  

Base UY-Base, 5 Pins (USA, April 1927) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.25 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC

This tube is the fore-runner of the UY224 and was made by a few manufacturers such as Ceco and Eveready Raytheon (AC22), Sonatron, Songbird (made for Montgomery Ward) and Sylvania (222AC). These tubes were only available for a few months - April to July 1929, when the type number was discontinued for these

Dimensions (WHD)
incl. pins / tip
x 123 x 45 mm / x 4.84 x 1.77 inch
Weight 50 g / 1.76 oz
122AC: Bill Condon collection, with kind permission of Mrs V Condon
Fin Stewart

122AC: Fin Stewart
Fin Stewart


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