Tube Tested on Calibrated Hickok TV-7B/U Mutual Conductance Tester.
Tube Tests as Follows.
(Actual Tube Readings and Percentage of Average NOS Tubes)
TV-7 Minimum (65% of New Tubes) for 5651 Tubes: 40.
TV-7B/U has been Refurbished and Calibrated by Dan Nelson.