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Manufacturer record
Marconi is a manufacturer or brand recorded in the TubeDatabase archive. The archive lists 25 tubes made or branded by Marconi. Tube numbers on file include 12AX7, ECC83, U52, 5U4G, EF86, 6267, 6BQ5, 6CA7, XF4, 12AX7A, 7025A, and ECC82 and others.
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