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573

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[–] 0 pt

Fridge motor magnets don’t distort old analog TV’s so much as the electrical arcs within the motor. Arcs emit the entire spectrum of EMF’s, from single digit hertz all the way as high as X-ray and gamma under vacuum, with enough power. When those fridge motors kicked on back in the day, the unshielded arcs emitting from the brushes got into the coaxial signal at the TV itself, distorting the picture. Especially true for vacuums, welders, any old inefficient unshielded motors..

A noise generator can knock every radio around offline with enough juice, primitive ones use naked electrical arcs.

[–] 2 pts

Fridge motor magnets don’t distort old analog TV’s so much as the electrical arcs within the motor.

I wasn't talking about the motors in the fridge causing interference. I'm also not talking about EMF/RF interference. I am talking about actual permanent magnets that people often stick on the fridge to hold things. Perhaps you are too young to know this, but decorative magnets used to be commonly used to attach things like children's artwork, important notes, bills or other documents and pictures to the doors of the refrigerator since the kitchen was a room where the family would spend a fair amount of time in. These decorative magnets were usually the ferro-ceramic type material that aren't terribly strong, but these magnets would distort the CRT display if you brought the magnet within inches of the display. This is what I was referring to. No EMF/RFI at all in my comment.

[–] 1 pt

Gotcha, ya you’re right about that, my mistake.