I tried to make a pmh and failed.

Author Topic: I tried to make a pmh and failed. (Read 2639 times)

JimBoot	I tried to make a pmh and failed. « on: 2015-07-15, 14:31:56 »
Group: Tinkerer Hero Member Posts: 1950	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.

Grumage

Re: I tried to make a pmh and failed. « Reply #1 on: 2015-07-15, 16:36:28 »

Group: Renaissance Man
Hero Member

Posts: 3122

Quote from: JimBoot on 2015-07-15, 14:31:56

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 !!

Cheers Grum.

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Nanny state ? Left at the gate !!

ion

Re: I tried to make a pmh and failed. « Reply #2 on: 2015-07-15, 17:39:58 »

Group: Elite
Hero Member

Posts: 4127
It's turtles all the way down

Quote from: Grumage on 2015-07-15, 16:36:28

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 !!

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

JimBoot	Re: I tried to make a pmh and failed. « Reply #3 on: 2015-07-15, 22:45:34 »
Group: Tinkerer Hero Member Posts: 1950	Thanks grum!

Slider2732	Re: I tried to make a pmh and failed. « Reply #4 on: 2015-07-17, 16:54:34 »
Group: Elite Experimentalist Hero Member Posts: 1602 ... .-.. .. -.. . .-.	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. --------------------------- ʎɐqǝ from pɹɐoqʎǝʞ a ʎnq ɹǝʌǝu

Grumage	Re: I tried to make a pmh and failed. « Reply #5 on: 2015-07-17, 17:16:13 »
Group: Renaissance Man Hero Member Posts: 3122	Agreed !! https://www.youtube.com/watch?v=dWXMxAOFW-w Cheers Grum. --------------------------- Nanny state ? Left at the gate !!