09-15-2015, 08:09 AM
It's not likely that the head not being lowered far enough is causing this problem. This is some type of electronics problem, like feedback, bad power, or something. You can't get that sine-wave generation due to anything associated with the media or head height. You could try a new floppy drive cable. It's possible that there is some sort of cross-talk, but I even doubt that. I have never seen anything like what your drive is periodically generating.
Back to the Future looks like it is indexed, but it's difficult to tell for sure because the flux is so bad.
Back to the Future looks like it is indexed, but it's difficult to tell for sure because the flux is so bad.