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231

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ID = 15330
       
Country:
United States of America (USA)
Brand:
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Triode, vacuum   Power/Output 
Identical to 231 = CX331 = NU-31 = C-231 = NX-231 = ER231 = ER31 = 31 = UX231 = 131 = 431
First Source (s)
1930 : Saga of the Vacuum Tube, Tyne p.329,330
Jun.1930 : Electronics p. 122

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

The tube UX230 (230, 30) was announced by RCA in June 1930. This is according to "Saga of the Vacuum Tube" by Tyne, pages 329 & 330. Also announced in "Electronics" in June 1930. In its original form, the 230 has a tubular "T9" bulb. During its commercial life, the bulb shape was changed to S12 and later ST12. Some tubes (such as Silvertone) were made with the ST14 bulb.

 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   

s_217_g_14.gif 231: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

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Just Qvigstad
Usage in Models 1= 1930?? ; 4= 1930 ; 3= 1931 ; 1= 1932?? ; 1= 1934?? ; 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11

Collection of

 
screenshot_20210206_154610_gallery.jpg

231
 

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