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Thread: Test for Sidewinders

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    Test for Sidewinders

    Folks -

    I recently had occasion to prescribe a test for possible mis-wiring of encased sidewinders, which produced an unexpected benefit.

    As suspected, the yanking of a ferrous hunk of something away from the sides while measuring a series connection and watching for similar ohmmeter response from both is a good way to determine proper relative polarity. However, I also discovered that it's a good way to see how much subtractive effect between coils (as in stacked configurations) exists. If you just read one coil and yank away from each side you can see how much opposite polarity influence there is on the combined system. Each coil will produce a significant deflection of the ohmmeter needle (for the recommended analog meter) when the ferrous material is yanked away from that coil's side. However, it will also produce a lesser deflection of opposite disposition when yanking the metal away from the opposite side. It's instructive to remember (as is the case with simple stacked coil arrangements) that this "subtractive" influence exists in the combined output of both coils.

    Bob Palmieri

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    rjb
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    Quote Originally Posted by fieldwrangler View Post
    It's instructive to remember (as is the case with simple stacked coil arrangements) that this "subtractive" influence exists in the combined output of both coils.
    The Seth Lover humbucker patent included a sidewinder configuration.
    It employed two short, offset coils- I believe, to minimize this subtractive coupling effect.

    -rb
    fieldwrangler likes this.

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    Quote Originally Posted by rjb View Post
    The Seth Lover humbucker patent included a sidewinder configuration.
    It employed two short, offset coils- I believe, to minimize this subtractive coupling effect.

    -rb
    Yeah... this common axis (and common core, commonly) is also likely responsible for the fact that the total inductance is less than the sum of its parts (those of the individual coils.)

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    So a sidewinder is essentially somewhat inefficient, not unlike a stacked coil configuration?

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    I say yes

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    ToneOholic! big_teee's Avatar
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    Narrow aperture sidewinders with magnets in the coils work great.
    Shielding foil helps keep them quiet.
    T
    Technicians Run the World, but Bankers, Lawyers, and Accountants, Take All The Credit!
    Keep Rockin! B_T
    Terry

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    Agreed. Keeping permeable material out of the cores minimizes hum.

    I'm a bit of a shielding but, and that definitely helps keep out buzz.

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    Pickup Maker David Schwab's Avatar
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    Quote Originally Posted by David King View Post
    So a sidewinder is essentially somewhat inefficient, not unlike a stacked coil configuration?
    Yes, but they are more efficient than stacked pickups. One of my first sidewinders started out as a stacked pickup. It was thin sounding with not much output as a stack, but sounded much better turned 90.
    It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. Albert Einstein

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    Pickup Maker David Schwab's Avatar
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    Quote Originally Posted by fieldwrangler View Post
    Agreed. Keeping permeable material out of the cores minimizes hum.

    I'm a bit of a shielding but, and that definitely helps keep out buzz.
    Bill Lawrence made sidewinders with air coils for acoustic guitars.
    It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. Albert Einstein

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    Quote Originally Posted by David Schwab View Post
    Yes, but they are more efficient than stacked pickups. One of my first sidewinders started out as a stacked pickup. It was thin sounding with not much output as a stack, but sounded much better turned 90.
    Yup. Come to think of it, that might be the way I first tried this, by turning a Duncan Strat Stack sideways....

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    Quote Originally Posted by David Schwab View Post
    Bill Lawrence made sidewinders with air coils for acoustic guitars.

    Never tried (or saw) one of those.

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    Pickup Maker David Schwab's Avatar
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    Quote Originally Posted by fieldwrangler View Post
    Never tried (or saw) one of those.
    I believe it was this pickup.

    https://reverb.com/item/546950-vinta...p-the-silencer

    gezlobx8b2hxpral3olp.jpg
    It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. Albert Einstein

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    Pickup Maker David Schwab's Avatar
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    It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. Albert Einstein

    www.sgd-lutherie.com
    www.soundcloud.com/davidravenmoon
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    Quote Originally Posted by David Schwab View Post
    Oh yeah... THAT one! I have seen those, just bought one for the files!

    Thanks, David!

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