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Sleeve lot (5) jan-6C4WA tubes ge nos 1969 date cd
Sleeve Lot (5) JAN-6C4WA Tubes GE NOS NIB 1969 Date Code. Gray plates, halo, and were made in the USA.
My tube tester is a SECO 107A Dynamic Mutual Conductance Tester. Good is at 60, but all tubes listed as NOS or NIB will have tested over 100, have no shorts, leaks or gas.