I have a couple quads of these, all of which were purchased NOS (as per the seller's description).
I use a Jackson 648s tube tester and have found that they all seem to test at 70-75%.
Have others found that these tubes test "low" even when seemingly new?
I use a Jackson 648s tube tester and have found that they all seem to test at 70-75%.
Have others found that these tubes test "low" even when seemingly new?