Pair tube direct heat triode tube, white base, gold foot, made in Russia, measured value 80/80 (rejected value 58) with replacement box ※The pair is determined based on the gM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: replacement box (PSVANE box)
Pair tube KT88/6550 compatible ball made in Russia code: 1409/1412, measured value 62/60 (rejected value 44) with original box, there is slight getter burn ※The pair is judged based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube ambient heat beam tube made in Russia, measured value 38/36 (rejected value 25), there is a getter burn with the original box ※The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube double triode tube made in Russia, measured value 120/120 (rejected value 50) with original 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 made in Russia measured value 116/114 (rejected value 50) with original box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box