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I have heard of the mods to add a fan, but I wanted to try a more simple approach first. I have a Geiger counter that can detect x-rays, so I will just measure using that. With the back cover off, there is still metal shielding on all sides of the x-ray generating tubes except the back. So the x-rays can only shoot the wall behind the TV, and since I have the TV in a finished basement, the other side of the wall is dirt. So x-rays, physically can’t be a problem.
I own several GE Portacolor TVs and the early chassis design had a metal cover on the flyback cage opening, but later models removed the metal cover, exposing the HV rectifier and flyback. GE could use this design because they use a rectifier tube with built in shielding and while the diode can handle up to 25kv, they only run it at 17kv. So the tube’s shielding and the plastic shell of the TV is enough to block the 17kev x-rays.
This shows that during the late 1960s, TV designers knew about flyback overheating and their solution was to just remove the high voltage cage cover.
Last edited by LukeSimon; 09-21-2022 at 09:51 PM.
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