Tube Tested on Calibrated Hickok TV-7A/U Mutual Conductance Tester.
Tube Tests as Follows.
(Actual Tube Readings and Percentage of Average NOS Tubes)
No Shorts.
TV-7: The Calculated Average for New Tubes: 69
TV-7A/U Minimum (65% of New Tubes) for 50L6 Tubes: 45
*TV-7A/U has been Refurbished and Calibrated by Dan Nelson.