For longer than I can remember we've had a Crookes radiometer sitting on our kitchen windowsill where it heralds the coming of spring by starting to turn when the morning sunshines on it through the window.
If you're not familiar with what I'm describing, see this:
I gave it a closer look and saw that the metal "hub" the vanes are attached to was "stuck to" the side of the bearing needle, and it looks like it's magnetism and not an out of balance condition because it seems it will "stick" anywhere around its periphery.
I'm guessing the hub and the needle are both made of steel and somehow got magnetized.
I don't own a demagnetizer big enough to fit the whole bulb in, and before I spend the time winding a BF coil and energizing it through a transformer and variac, does anyone have any ideas what else I could do or use to attempt to demagnetize this old family friend? (Without busting the glass that is.)
Jeff