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Home made enameled wire ???

Discussion in 'Electronic Design' started by orvillefpike, Jun 24, 2007.

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  1. orvillefpike

    orvillefpike Guest

    Would anybody know if there is some kind of coating or paint, that I
    could coat cooper wire with, to make some kind of homemade enameled


  2. Pure cooper wire is so hard to find, I don't even know why you would
    consider such a dastardly act.
  3. whit3rd

    whit3rd Guest

    There's stuff called "Q dope" sold for this purpose. It's just a
    variant on
    clear nail polish. Modern coatings on mass-produced magnet
    wire are superior to anything you can get at home. The 'Beldsol'
    variant allows solder-through, which I find convenient.

    When true varnish was used on copper wire, it was backed up with
    a wrap of cotton (because the varnish developed cracks and wasn't

  4. No, it isn't "sold for that purpose". Q-dope is for high voltage
    NODES. That would be the exposed connections between two endpoints on a
    conductor in an HV circuit. It is made for sealing those exposed nodes.
    NOT for "enameling an entire wire".
    It's just a
  5. orvillefpike

    orvillefpike Guest

    GE had a paint, called Glyptal, that they used on electric motor, I
    wonder if that would be any good.

    I'm not sure if I'm going to try making my own enameled wire, but if
    somebody had done it in an easy and effective way, I might be tempted.
    The ideas I had so far are not "easy and effective".


  6. Short quantities of high temp enameled mag wire are available. Then
    all you have to insulate with glypt or q-dope are the nodes which should
    already be on your list of things to do. GC Electronics has the red HV
    "q-dope" or whatever their brand is. Several hundred volts per mil
    breakdown strength on that one.

    Red Insulating Varnish Catalog 120407 55.pdf
    About two thirds down the page on the left.
  7. orvillefpike

    orvillefpike Guest

    Since I'm making strips of .060" thick and .500" wide and since it
    doesn't wind too well, I think that I am going to do like Tim Williams
    did and wrap a winding of maybe 10 turns one on top of the other with
    insulation in between and put 3 winding side by side and connect them
    in series.
    It's probably the most efficient way to use the space that I have
    around the core anyway.

    Thanks everyone
  8. When I made mine, I think I made 8 double edge coil sets.
    Each started with the middle of a ribbon section diagonal
    across the bottom of the slot in a wooden form wide enough
    for two coils, side by side. I wound the two ends of the
    ribbon into one of the coils, with the ends at the outside.
    Then I removed the wooden form and tied the coils, wrapped
    them with mylar tape and epoxied them into a solid unit. I
    stacked 4 of these on one of the E stacks, with thin spacers
    between, to allow for some cooling air to get to the bottom,
    and epoxied the coils onto place. I trimmed the coil ends
    so that each overlapped the end of its neighbor, and lap
    soldered then in series. This way, I could connect the
    coils on one E stack either in series or in parallel with
    the coils on the other E stack.

    If this doesn't make sense and you want to understand this
    example, let me know, and I will take the camera out to the
    shop and photograph the ugly monster. It has never been
    prettied up, with one half just sitting on the other, with a
    thin slab of plywood or something between the halves. But I
    have been welding with it, off and on, for about 20 years.
    It works very well, with my buzz box and a rectifier, giving
    a very quiet arc with almost no splatter. With some rods
    the flux forms a smooth scab that curls up and falls off
    when the weld cools (wish I could remember what kind of rods
    those were), leaving a nice clean bead. That never happens
    with AC feed.
  9. My huge inductor...
    Since photos are not allowed in this group, and you have
    also been discussing this construction in Yahoo groups,
    Electronics 101, I'll get a photo posted there is a few
    days. I'll let you know when it is available.
  10. orvillefpike

    orvillefpike Guest

    Good, I can't wait to look at your contraption.

  11. legg

    legg Guest

    Wrapping in polyester film, or polyester adhesive tape allows winding
    flexibility of flat conductors, if sharp edges are not present. With
    adhesive tape, placing a layer on one side only can be sufficient.

  12. orvillefpike

    orvillefpike Guest

    What is polyester tape used for? Is it specifically made to wrap wire?
    Is it readily available?

  13. Find the yellow 3M "transformer tape". The adhesive forms seals that
    cannot be beat. Another brand name is "Permacel". YLW.pdf

    One example.

    Hard to find in small lots though.
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