Antique radios, Old Time Radios
UX222
| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bu)
Top contact with a cap.
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| 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.
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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
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UX222: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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UX222: RCA Tube Manual RC-10
Heinz Höger
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):43
Collection of
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