Core Material for Induction Coils / Transformers

Discussion in 'Homebrew and Kit Projects' started by KK4NSF, Oct 13, 2020.

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  1. K6BSU

    K6BSU Ham Member QRZ Page

    Instead of building something new, use an old Ford Model-T spark coil. These show up from time to time on e-bay

    Attached Files:

  2. KK4NSF

    KK4NSF Ham Member QRZ Page

    I've got several ignition coil devices, but for this project it doesn't work. It's a good idea, though.
  3. VK4HAT

    VK4HAT Ham Member QRZ Page

    Ebay has large ferrite bobbins and I assume mouser and others would have them too, you can also buy silicon steel sheet rather easily and cut out your own lamination stackups as painful as that sounds, but you would get exactly what you wanted that way.
  4. KK4NSF

    KK4NSF Ham Member QRZ Page

    do you have a source that will sell small quantities? All the ones I know who have it do not want to sell smaller quatities.
  5. VK4HAT

    VK4HAT Ham Member QRZ Page

    Not in the USA, but there are specialist sheetmetal places here that will sell to you by the sheet or half sheet. You would have to do some google searching and then get on the phone and talk to people. My local steel retailer can get in most exotics.

    You could try in the USA they sell exotics, one of the youtubers I watch who is in canada got a bunch of titanium and zirconium from them. They would be a good place to start, but i have not looked to see if they have silicon steel.
    KK4NSF likes this.
  6. KK4NSF

    KK4NSF Ham Member QRZ Page

    well dang.... two hours of google searching has still not turned up anything . I'll have to get on the phone tomorrow and see what I can turn up
    VK4HAT likes this.
  7. N1OOQ

    N1OOQ Ham Member QRZ Page

    What about the electric fence wire at the farm supply store? Steel, I believe.
  8. KK4NSF

    KK4NSF Ham Member QRZ Page

    Electric Fence wire does not appear to be workable..... BUT I think Re-bar tie wire might be. It is very low carbon, and annealed to make it very easy to twist. It is close to what the old books call "soft iron wire". I'm going to do a test tomorrow.
  9. VK4HAT

    VK4HAT Ham Member QRZ Page

    Best of luck.
  10. WA4SIX

    WA4SIX Ham Member QRZ Page

    Find a local blacksmith?


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