Pair tube, 6 AS7 compatible ball, made in Russia, measured value 70/68 (rejected value 36) with original box ※The pair is determined based on the gM value measured by the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode tube made in Russia measured value 72/70 (rejected value 38) with original box (inner cushioning material has deteriorated) *Pairs are determined based on gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube KT88 compatible sphere Russian metal brown base measurement value 50/50 (rejection theory 44) there is writing on the base with the blue box ※The pair is determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: blue box