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Thread: Self-demagnetizing & Jazzmaster pickups

  1. #1
    Senior Member
    Join Date
    Mar 2010

    Self-demagnetizing & Jazzmaster pickups

    Folks -

    So, those Alnico rods on those pickups don't appear to follow the usual recommended aspect ratio for this material. Come to think of it, I haven't actually measured any but somehow an image persists in my mind of shorter-than-supposedly-ideal little rods.

    If so, do we think there's been a significant drop in gauss level over the decades in some of the older units (or has someone measured such things?)

    In any case, I'd like to start getting an idea of how much flux seems "ideal" for given string-to-polepiece distances for given string gauges in this design.

    I also have a vague recollection that one of you wiser guys once said that Leo never lost any sleep over stuff like this, which is doubtless true.

    Bob Palmieri

  2. #2
    Senior Member
    Join Date
    Aug 2009
    Melbourne, Australia
    I'm pretty sure that JM pups use 0.471" * 0.187" A5 rods.
    fieldwrangler likes this.

  3. #3
    Join Date
    Feb 2015
    as far as typical alnico rods go the shorter the rod the weaker the magnet, once you get sown to 3/16 by 1/4 long you have a magnet that will hardly lift its own weight, dont know if the length makes it more likely to discharge over time being in proximity to like poles
    fieldwrangler likes this.

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