I tried to make a pmh and failed.

[JimBoot]

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]

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.

[ion]

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!

[JimBoot]

Thanks grum!

[Slider2732]

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.

[Grumage]

Agreed !!

https://www.youtube.com/watch?v=dWXMxAOFW-w



Cheers Grum.