B9A base: Difference between revisions

B9A base (view source)

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			[[File:B9A base.gif\|thumb\|right\|350px\|click to enlarge]]
	The 9-pin '''B9A (Noval) tube base''' was developed in the late 1930s for miniaturized all-glass tubes, with the earliest tubes using this base commercially introduced in the early 1940s.		The 9-pin '''B9A (Noval) tube base''' was developed in the late 1930s for miniaturized all-glass tubes, with the earliest tubes using this base commercially introduced in the early 1940s.