Pair tube military high reliability tube 6V6GT equivalent tube black base smoke measurement value 84/84 (rejected value 46), all but the printing on the top of the tube with white box has disappeared, but it was determined that it was CV511 based on the structure ※The pair was determined based on the gM value measured by the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube 6SL7 equivalent tube military tube brown base ring getter measurement value 52 (rejected value 32) with original box ※The measured value shows the gm value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Sold per bottle, 300B equivalent tube, direct heat triode, English tea base, double ring getter, measurement value 66 (rejection value 58) with original box*The measured values represent the gm values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box