Radio Antica e Radio d'epoca
4631_WLS
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Stato:
USA (Stati Uniti d'America)
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| Identico a |
4631_WLS
= WLS527
= C327
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| Valvole
simili |
Sostituita normalmente - piccola diff.:
N_CeCo
; UY227
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| Zoccolo |
UY-Base, 5 Pins (USA, April 1927)
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| Filamento |
Vf 2.5 Volt / If 1.75 Ampere / Indirect / Specified voltage AC/DC |
| Descrizione |
Page 671 of the Fall 1928 issue of the Sears Roebuck catalog lista the 4631 as a new tube, equivalent to the UY227. The company sold the standard range of US designed and made tubes and these were made by a few small manufacturers. The "WLS" (Worlds Largest Store) brand was either hot branded on the base of the tube or a paper label on the glass. The fall 1929 catalog has an entirely new catalog number and the 4631 became the 57T227.
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Dimensioni
(LxAxP)
incl.pins/tip |
x 108 x 45 mm / x 4.25 x 1.77 inch |
| Peso |
47 g / 1.66 oz |
| Bibliografia |
Tube Lore (I) page 16.
Sears, Roebuck Catalogs (Silvertone) Page 671, Fall 1928 issue
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4631_WLS: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collezione di
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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