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Tube Substitution Handbook No. 12
(book)

Tube Substitution Handbook No. 12

THIS RADIO HAS BEEN SOLD!

1969 edition, by the Sams engineering staff. An indispensable reference for your workbench- not only for subbing in a tube when you don't have the right one, but also for figuring out what a rogue tube on your latest find might have originally been intended to be. Also might help you find cheaper and more plentiful substitutes for tubes that are becoming scarce. I've used mine for all of that and more. Add this one to your reference library and rejoice. 8.5 x 5.5 inches, softcover, saddle bound, good condition with some wear due to use. 96 pages.
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