Thanks for the "scientific" testing! I'd heard this rumour before, but it's never stopped me from using my EBow.. No damage to any of my guitar p-ups, as far as I can tell.Axemaster said:Ok, I just performed a test to see just how much magnetism is coming off the Ebow I have. I did not have a gauss meter but an old crt tv can be used as a crude substitue. The Ebow made a slight color distortion when I placed it on the screen. It made a slightly more visible distortion on the colors as compared to a refrigerator magnet. It was nothing compared to the distortion of color I got from a real physical magnet. And just for grins... I put the alnico pickup I have next to the screen and...WOW. It distorted the picture all the way to the edges of the screen. The Ebow does not put out even a 20th as much magnetism as what the anlico magnet is putting off. I would say it is quite unlikely it could ever deagauss the alnico pickup under the course of normal operation.