Test results must exceed the tester minimums by at least 10%. I attempt to match all the tubes sold in pairs to within 7% of the test readings. When tested on my TV-7D/U tube tester, where passing is 35, this tube tested over 90.
Test results must exceed the tester minimums by at least 10%. I attempt to match all the tubes sold in pairs to within 7% of the test readings. When tested on my TV-7D/U tube tester, where passing is 35, this tube tested over 90.