Anyone know how to re-magnetize a compass needle ?
Posted 09 October 2010 - 07:22 AM
Posted 09 October 2010 - 12:35 PM
Posted 09 October 2010 - 02:32 PM
So here's what you might try: Hold the compass at an angle where the needle isn't free-floating, and press that magnetic key holder against the compass case (assuming the needle's sealed inside), as close to the needle as possible, then lift it away from the compass. If it still points wrong, try the same thing with the magnetic key holder at another angle.
The polarity of the keyholder may be tricky. You may first need to find North-South by holding it near the compass, watching the needle follow, and then turning the keyholder 180-degrees from that position to remagnetize while the needle is jammed. The idea is to find the spot with the most powerful reaction, and then force it to the opposite polarity.
EDIT: I just now remagnetized one of my tiny sig-item compasses instantly, using a rare-earth magnet, while holding the compass on its side (so the needle can't move). Now it points South. And I'm gonna sign it and place it in a cache that way.
This post has been edited by kunarion: 09 October 2010 - 06:03 PM
Posted 16 October 2010 - 07:15 PM