Classic Currents
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Tested Matched Pair of 1979 Western Electric 415A Tubes with Original Boxes.
Date Codes of 7926 places the production of both to April - June of 1979.
Tubes are closely matched for Gm testing (see below), 1979 date codes and internal structure - they are identical.
Black plates with top O ring getters.
The date codes on the tubes match the dates on the boxes so you know that they're the same boxes that they left the factory with.
Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:
Gm Test = 2625 and 2500 micromhos
Minimum pass/good = 1540
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