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Eric-
I first learned (the hard way!) what a "hot chassis" is when I was installing a little kit "frequency counter calibrator" into my Sony KV-1922, in 1980. I started to hook an oscilloscope probe's ground clip to the chassis when I got the big BANG! and the TV went dead. On mine, one or more of the main diodes after the power switch had blown.
I hope you can find a good deal on an isolation transformer if you do not already have one.
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Chris
Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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