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2026-10-09
- 170 new manuals added in aes, alinco, bitsavers, b&k, century, collins, dovetron, ebooks, eico, electric-eye, freq-electronics, goodwill, hickok, johnson, kantronics, micronta, military, national, rca, scientific_radio, sencore, sylvania, tennelec, triplett, uniden, and xyz.
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2026-10-21
- New beta site for public review.
450a
readme
here is a recreation of the manual for the Superior 450 tube tester including test data . I spent two years trying to find a manual and finally found an electronic copy of a photocopy that is hard to read. so I painstakingly recreated it as close to the original as possible. I am sure there are others who need a clean copy so I thought I would summit it. I will update it as more information is found. 73 Paddy KC9ROD Freeport IL
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