Radios antiguas y Radios de Colección
257
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País:
Estados Unidos
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| Idéntica a |
257
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| Válvulas similares |
Substituya normalmente -diferencia peq.:
GA
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| Base |
UY-Base, 5 Pins (USA, April 1927) (Codex=Kf)
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| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 5 Volt / If 0.3 Ampere / Indirect / Specified voltage AC/DC |
| Descripción |
Developed by Tung-Sol as a DC power amplifier. This tube was used in the Fada models 171 and 173. These receivers were operating on 110 volts DC. the supressor grid is wired to the center of the filament. Tube as originally designed by National Union.
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Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip |
x 137 x 54 mm / x 5.39 x 2.13 inch |
| Peso |
59 g / 2.08 oz |
| Literatura |
Taschenbuch zum Röhren-Codex 1948/49
Tube Lore (II) Page 31
-- Collector info (Sammler)
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
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| Tube Tester Data |
Avo CT160 |
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257: Telefunken Werkstattbuch
Wolfgang Bauer
Mas ...
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Just Qvigstad
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Número de
modelos en Radiomuseum.org con esta
válvula:12
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[rmxtube-en]
| Cumplimiento de datos |
Más información |
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