One quad of TEN 6L6GT. TV-7D/U tsted at 50, 50, 49, 50. where the minimum good is 25.
Item Tag: ten
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(2) Ten (Kobe Kogyo Corp) 12AT7 Preamp Tubes Made in Japan Test Strong Amplitrex
(2) Ten (Kobe Kogyo Corp) 12AT7 ECC81 Preamp Tubes Made in Japan. Tested on an Amplitrex AT1000.