My dad (an aircraft mechanic) used to tell the story of this guy he worked with who used to brag about how he was so tough he could let a magneto fire a spark into his hand and not be hurt by it. Dad would just laugh and say 'but why would you want to do that?'
CRTs have circuits that USUALLY discharge them when you shut down. If there is a spark it USUALLY won't hurt you badly. Every once in a while though CRTs can bite big time. Even if it doesn't kill you, it could kill your motherboard, video board, or the CRT itself, depending on what you happen to be leaning against when it sparks.
Yes, you can work on a CRT without taking precautions. But the precautions don't take too much effort so why risk it?
There is the saying that what doesn't kill you makes you stronger. It doesn't apply to electric shock. Each shock can do damage and it will add up.
Rule of thumb for high voltage, even when you know it's off (or discharged) assume it isn't. If you have to touch the circuits then short them to ground first, just in case.
And yes, the Mac Plus does NOT have a self discharge circuit so it can maintain charge for some time.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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