Not refering to the Jean Michelle Jarre album!   At the bass bash I brought some magnetic field paper to see what was under the pickups of various devices. Most are pretty obvious what you are going to see, but here are some notable ones. I found it interesting anyway       As a reference, this is a standard bart soapbar, twin coil humbucker, looks like you would expect   This is a high gain rickenbacker 4004 pickup, obviously originally desig