Antique radios, Old Time Radios
UX225_5pin
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Country:
United States of America (USA)
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| Identical to |
UX225_5pin
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| Similar
Tubes |
Different connections:
AX225
; UX225
Other base:
UY227
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 5 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC |
| Description |
This tube is one of the experimental series of tubes in development of the UY227 tube. In December 1922, an employee of the Westinghouse Electric and manufacturing Company's tube Research Department published an article on an a/c type of tube in the Electric Journal. This tube was double ended but similar to the eventual type 227. The 5 pin UX225 was the last in the experimental series of tubes in the research. It was not until 1925 that serious consideration was given to this tube as an RCA product. In April of the following year, RCA asked Westinghouse for further of this tube and an estimated cost. The designation UX225 was given to the tube and 1000 tubes were supplied to RCA. These were still of the double ended type (UX 4 pin base at one end and a Ba15S bayonet automotive lamp base at the other, In November 1926 Westinghouse suggested that a single ended tube could be made with a five pin base, with the pins in a "W' format. A few UX225 tubes were made with this base but the company changed the type number to AY225. This change was for commercial reasons. At a meeting later in April the type number was changed to UY227 and a different base again was settled on. This base became the standard "UY" base as used on many tubes in later years.
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Dimensions (WHD)
incl. pins / tip |
x 108 x 45 mm / x 4.25 x 1.77 inch |
| Weight |
50 g / 1.76 oz |
| Information source |
- - Manufacturers Literature Early tube development at GE,1933, page 4
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