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PT 3: Arrays of supermagnets: Bar magnet and compass

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The field is zero around a blob of small neodymium magnets ...unless you align them first! Color CRTs get distorted! Make some rotating compasses from rings of magnet beads. (Sell them at weekend flea markets!) These are 8mm and nickel plated. For various suppliers links, see bottom of http://amasci.com/spheres/ These are around $0.35 each if bought in qty. from Mr. George, http://www.supermagnetman.net/...

Channel: Howto & Style
Uploaded: December 31, 1969 at 3:59 pm
Author: wbeaty

Length: 02:27
Rating: 4.56
Views: 86872

Tags: amasci  crt  distortion  magnet  nanotechnology  neo  neodymium  physics  science  supermagnet  supermagnets  

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Video Comments

jlohnik (December 31, 1969 at 3:59 pm)
com p. is crap!
cometpowell (December 31, 1969 at 3:59 pm)
Thanks for the back up
wbeaty (December 31, 1969 at 3:59 pm)
It's hard to tell in the video, but the magnets are about 6" away from the monitor.If you place supermagnets against the screen, the color change will persist, but there are several ways to "degauss" the iron screen inside the CRT.The real danger is in magnetizing the steel frame. If you place supermagnets directly on the edge of the CRT, Or sit them on the monitor case, you can cause color-warps which can never be degaussed.
macchesney (December 31, 1969 at 3:59 pm)
Hahah.. nice come-back... alienscientist, comet was just trying to be helpful ;)
cometpowell (December 31, 1969 at 3:59 pm)
If you know all of this, Why'd you bother asking "why not???"
AlienScientist (December 31, 1969 at 3:59 pm)
Do you know how a cathode ray tube works? The fundamental principals behind how a CRT displays color?watch?v=D3OSTflMO80The color is a result of electromagnetic fields, an externally supplied magnetic field disrupts the image:watch?v=s1xS-ssfTM8This will NOT cause permanent damage to the monitor! You can 'degauss' the monitor with a magnet and a drill like this:watch?v=j404EgmdXSU
cometpowell (December 31, 1969 at 3:59 pm)
It might ruin your monitor!!!
AlienScientist (December 31, 1969 at 3:59 pm)
Why not?
cometpowell (December 31, 1969 at 3:59 pm)
You shouldnt do that
wbeaty (December 31, 1969 at 3:59 pm)
> last thing you were throwing up in the air look up "buzzing magnets!" Two hard shiney supermagnets that bounce together.

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