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only thing I can figure is judging by the warning sticker about not measuring line voltage the scope came from the local air force base where I work which may explain the 5ADP1 CRT given the inherent issues a non flat faced tube has with distorting the displayed waveform.
also the 5ADP1 CRT worked properly for how ever long it was in there until the focus messed up. when I got it I used it maybe 3-4 years before the focus problem happened and it always had proper focus.
I am begoning to suspect it is some defect with the CRT that maybe shows itself with age. only way to be sure is with a CRT tester or even better something designed for that CRT.
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Main system
Scott LK-72A amp & LT-110 tuner
Garrard Zero 100C turntable
AKAI GX 255 RTR
iPod & computer
DIY speakers (upgrading them soon)
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