Pair tube direct heat triode tube made in Russia, measured value 88/86 (rejected value 58) with original box ※Pairs are determined based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, 6CA7 compatible ball, made in Russia, measured value 44/40 (rejected value 30) with white box ※Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, double triode tube, VT-231 equivalent tube, made in Russia, measured value 114/106 (rejected value 50) *Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: none
Pair tube Russian metal base measurement value 56/54 (rejected value 44) lot: 1110/1110 ※Pairs are determined based on GM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box