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Update: Video explanation at 4:05 revised again with tweaks & spark energy explanation.

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How (not) to discharge a CRT! - in simple terms | feat. The 8-Bit Guy, Jan Beta, & ...Bjork?

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Comments

Paul Jacobson

Bjork doing a video on TV repair?.. I must have banged my head this morning :))

Robert Sundling

BTW, in case it comes up, CRT voltages are much higher than 250V; a rule of thumb is a CRT needs roughly 1000V (1 kV) per 1” of diagonal screen size to deflect the electron beam. So you’ll find perhaps 9 kV on a Mac’s 9” CRT. It’ll be different for short- versus long-neck CRTs, etc., but 1 kV/inch is usually a decent ballpark figure. (Or perhaps you’d call that a decent cricket ground figure?)

Retro Recipes 👾 PowerUp!

Haha thanks! Did you see the edited video? I just use 250V as an analogy to simplify the comparison to a capacitor. Although I was told Mac CRTs store 700V ¯\_(ツ)_/¯