Radio Antica e Radio d'epoca
222
| Zoccolo |
UX-Base (4 Pins (2 thick, USA 1924)
Top contact with a cap.
|
| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Vf 3 Volt / If 0.13 Ampere / Direct / Battery = |
| Descrizione |
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 ampere 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 1.5 milliampere anode curent. Amplification factor is then 300 and the mutual conductance 350 micromhos.
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Dimensioni
(LxAxP)
incl.pins/tip |
x 123 x 45 mm / x 4.84 x 1.77 inch |
| Peso |
48 g / 1.69 oz |
| Bibliografia |
Taschenbuch zum Röhren-Codex 1948/49
Tube Lore (II) p. 26
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
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222: Electronics, Dez. 1930
Achim Dassow
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222: ARRL Handbook 1972
Anonimo 10 Collezionista
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Just Qvigstad
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Numero
totale di modelli di Radiomuseum.org che
utilizzano questa valvola:45
Collezione di
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| Conformità dei dati |
Ulteriori informazioni |
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