Tested good with Heathkit TT-1.
Item Tag: 6Y6G
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6Y6G General Electric Vintage Beam Power Amplifier Guitar Amp Radio Hi-Fi Tube
One GE 6Y6G power amplifier tube. Note the last three pictures before the test results are trying to show that there is a little tiny speck of. There is a little oxidization on the pins, but that appears to be just from Storage.