One tested 5751, still able to make out some of the date codes ect. Test results pictured. I will package properly and ship promptly.
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Plate(s): Black w/Copper Grid. Manufacturer: GE. The tubes need to get to you in one piece. But this the way of the world now. We are always looking to buy more tubes. Large collections, small collections, it doesn't matter.
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2 X 6679 / 12AT7 / ECC81 TUBE. 1950s PRODUCTION. BLACK PLATES, RECTANGULAR TILTED GETTER, COPPER RODS, MATCHED PAIR. TESTED IN AMPLITREX AT1000 TUBE TESTER.
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I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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Date Code SY. (1) Tested GE 12AT7/ECC81 Tube. We prefer the versatility and precision of Hickok TV-10 military testers and use them almost exclusively except in rare instances when pinout/socket compatibility is not possible.
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TheGE 12AZ7 vacuum tube is a dual triode developed in the early 1950s and primarily designed for RF and audio frequency applications. It is closely related to the 12AT7 but was engineered to provide higher transconductance and improved performance in certain circuits.
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One tested 5751, this one tests slightly lower on my tester than the others I’ve tested but still in the good range on my tester as pictured. I have several like this but just one identical code match, which I listed as a pair. If you’re interested in multiples or more than one I will work with you on a deal. Thanks for looking. I will package properly and ship promptly.
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