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Manufacturer record
Sylvania is a manufacturer or brand recorded in the TubeDatabase archive. The archive lists 45 tubes made or branded by Sylvania. Tube numbers on file include 12AD7, 12AX7, 12AX7A, ECC83, 7025, 12AX7WA, 12BH7A, 12BZ7, 12DF7, 2C51, 5670, and 5692 and others.
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