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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: 12BH7 black (smoked) glass posted by shibu on February 4, 2007 at 04:56:08:
Tung-Sol made black glass tubes in the 50s. The black glass 12AU7 immediately springs to mind, but I don't know to what extent they expanded the practice in other tubes.
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- Re: 12BH7 black (smoked) glass - Catch22 11:58:03 02/05/07 (0)
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