[Rafael Vanoni]

Hi folks,
recently my JM27 started making random noises, all in the lower end.
Mostly rumbles and hums.

Since this is a pretty cheap mic and there's no tech assistance near
me, I'm thinking about trying to fix it myself. I figure it could be a
good way to learn this stuff. I don't have any serious background on
EE, but I can handle basic and your everyday obvious repairs.

This would be the first time I try something more complicated, so I
sure could use some pointers. If you guys could help me out here, I'd
appreciate it. Also, are there any books you'd recommend for someone
starting to mess with this kind of electronics?

Thanks
Rafael