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B9E base: Difference between revisions
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(Created page with "thumb|right|350px|click to enlarge The 9-pin '''B9E (Novar) tube base''' is a larger variant of the {{B9A base}} developed for higher-powered American tu...") |
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The similar [[B9D base|B9D (Magnoval) based]] used by comparable European tubes has the same pin circle geometry but the tube have a diameter of 1.27 mm (0.046"). Inserting Magnoval tubes into Novar sockets by force will widen the latter's contacts, thereby damaging the socket, whereas a Novar tube will not make reliable contact in a Magnoval socket. | The similar [[B9D base|B9D (Magnoval) based]] used by comparable European tubes has the same pin circle geometry but the tube have a diameter of 1.27 mm (0.046"). Inserting Magnoval tubes into Novar sockets by force will widen the latter's contacts, thereby damaging the socket, whereas a Novar tube will not make reliable contact in a Magnoval socket. | ||
Moreover, many Novar tubes have a glass nipple at bottom of tube which requires a center hole in the socket. | |||
==See also== | ==See also== | ||