Rick's 38ga 1000wind bucker challenge

[Joe Gwinn]

True, but even the weakest case is still a pretty strong field, and the applied field varies sinusoidally, not what we are doing in a pickup. We apply a field, moving to a point in the B-H plane. Then we apply a small ac perturbation. I think that the loop is pretty flat in this case.

That seems to be the whole point of demagnetizing the alnico a bit - as one gets away from the outer curve (the material saturation boundary) the hysteresis loop will open up, increasing the loss.

[Mike Sulzer]

That seems to be the whole point of demagnetizing the alnico a bit - as one gets away from the outer curve (the material saturation boundary) the hysteresis loop will open up, increasing the loss.

I am not sure if you mean losses in the steel in the cores of a humbucker or in the magnet itself. As I showed somewhere above, we are far from saturating the steel because the output level keeps rising with stronger fields. Losses in the Alnico itself seem to be small for a humbucker; there is little increase in the resonant peak when the magnet is removed.

[Joe Gwinn]

I am not sure if you mean losses in the steel in the cores of a humbucker or in the magnet itself.

Alnico.