To: | <amps@contesting.com> |
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Subject: | [Amps] Bakelite on base of 3-400Z Tubes |
From: | 2@mail.vcnet.com (Richard) |
Date: | Fri, 12 Jul 2002 08:52:23 -0700 |
>I found some old but good 3-400Z tubes. A couple of >them have a bakelite cover or attachement on the base. > Anyone know what it was for? To reduce the chance of glass fracture/vacuum-loss when some Turkey rocks the tube sideways during extraction and puts bending stress on the pins. [Amperex tubes do not need this because they use bubble-glass in the base, which is highly Turkey-resistant.] cheerz, Bill - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end |
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