Radios antiguas y Radios de Colección
Y-224
| Base |
UY-Base, 5 Pins (USA, April 1927)
Top contact with a cap.
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| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 2.5 Volt / If 1.75 Ampere / Indirect / Specified voltage AC/DC |
| Descripción |
Star-Ko made adds for the Y-224 (Y224) "AC Screen Grid Amplifier" at about 1928. Tyne lists about 250 US brands for vacuum tubes in "The Saga of the Vacuum Tube" but not Star-Ko. Since Star-Ko praises that the tube was produced "in tremendous quantities" and sells it for $ 1.39 in quantities with a list price of $ 4.00 we think that Star-Ko bought tubes with lower quality from a big tube maker to sell them off. Or they could sell at a time where the tube was already obsolete. See also X-245.
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Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip |
x 123 x 45 mm / x 4.84 x 1.77 inch |
| Peso |
50 g / 1.76 oz |
| Literatura |
-- Collector info (Sammler)
Allied Radio Catalog (Knight) p46 1931
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Y-224: ARRL Handbook 1972
Anónimo 10 Coleccionista
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Just Qvigstad
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Y-224: Vitor Oliveira
Ernst Erb
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Número de
modelos en Radiomuseum.org con esta
válvula:3
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