I'm the one who sold him the tube. I checked it twice on my BK 445. Tested great with good cut off. I tested several other tubes. Good tubes generally have good cut off unless they are on their last legs.
I have checked tester, and, have new electrolytics in it, and, have recently calibrated meter movement.
I don't see the problem with the tube. Heck. The emissions were even beyond 700, heading into new.
I believe this tube has seen very little use.
Bill Cahill
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"Tubes are those little glass things that light up orange unless there is a short.. Then they light up all pretty colors..."
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