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2024-05-21, 01:01:21
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Author Topic: I tried to make a pmh and failed.  (Read 2322 times)

Group: Tinkerer
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*****

Posts: 1729
I've done this before but this time all it made was a perm magnet. Took a u shaped piece of rebar, two coils wound in opposite direction. A quick touch of the battery but it doesn't seem to release its magnetism. I have removed  the keeper several times but it's still a magnet. Quickest mag I've ever made.
   

Group: Renaissance Man
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Posts: 2746


Buy me a cigar
I've done this before but this time all it made was a perm magnet. Took a u shaped piece of rebar, two coils wound in opposite direction. A quick touch of the battery but it doesn't seem to release its magnetism. I have removed  the keeper several times but it's still a magnet. Quickest mag I've ever made.

Dear Jim.

You probably found a bit of Re bar with a higher Carbon content.  The first PM's were made from High Carbon Steel. You need to find a piece of Wrought Iron or better still Pure Iron.

It'll work then !!   ;) O0

Cheers Grum.


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Nanny state ? Left at the gate !! :)
   
Group: Elite
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Posts: 3537
It's turtles all the way down
Dear Jim.

You probably found a bit of Re bar with a higher Carbon content.  The first PM's were made from High Carbon Steel. You need to find a piece of Wrought Iron or better still Pure Iron.

It'll work then !!   ;) O0

Cheers Grum.

Agreed!


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"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy
   

Group: Tinkerer
Hero Member
*****

Posts: 1729
Thanks grum!
   
Group: Elite Experimentalist
Hero Member
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Posts: 1399
... .-.. .. -.. . .-.
Ferrite works too. Not as strong, but definitely works.
https://www.youtube.com/watch?v=tvi5yBZfeFk

I think I just wound the coils in the same direction and linked them as end of one to start of the other. The 2 ends then become where power goes to.


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ʎɐqǝ from pɹɐoqʎǝʞ a ʎnq ɹǝʌǝu
   

Group: Renaissance Man
Hero Member
*****

Posts: 2746


Buy me a cigar


---------------------------
Nanny state ? Left at the gate !! :)
   
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