New youtube of magnet/coil "perpetual motion"

[magnetman12003]

Is that an old crt degaussing coil around a dinner plate?

You are correct.  A 12 inch diameter (80 ohm) degausing coil is connected to a square wave generator. A dinnerplate is centered in the coil.  I have had the most fun with this simple setup in years.  Many magnet combinatons can be tried on the plate by adjusting the frequency of the generator.  Some magnets will spin - others wont. Very little output from the generator is required.

Tom

[Lakes]

I was wondering what size the CRT was to have a 12" coil?

I have no idea what size they normally are, but this seems quite large to me.

[pinestone]

I was wondering what size the CRT was to have a 12" coil?

I have no idea what size they normally are, but this seems quite large to me.

That coil of his pre-dates modern color televisions. Back in the 'old days' we had to manually degauss the crt's every time the television was moved around the house or if a strong magnetic field was near the crt (like a vacuum cleaner motor).

You held the coil in front of the crt and waved it around like some sort of magic ritual.
It sure looked pretty with all the colors interweaving with each other...

[Lakes]

That coil of his pre-dates modern color televisions. Back in the 'old days' we had to manually degauss the crt's every time the television was moved around the house or if a strong magnetic field was near the crt (like a vacuum cleaner motor).

You held the coil in front of the crt and waved it around like some sort of magic ritual.
It sure looked pretty with all the colors interweaving with each other...

Thanks for the info, could be interesting to see it action on a CRT, if you still have one that is...

[pinestone]

Thanks for the info, could be interesting to see it action on a CRT, if you still have one that is...

you could make one- or take one out of a newer crt monitor. Its a loop of wire around the face of the crt (inside the cabinet).