Fishman - pro-rep-banjo pickup installation

Believe me this thing has been a pain in my ass, but mostly due to a crappy installation at mad music, then the bluegrass shop both in st pete. Once I sucked it up and started to learn something about it myself, I figured out it definitely needed some more love and care. First of all a very thin magnet is attached to the banjo head, it has adhesive on one side, and the magnet/surface of the banjo pick up is fixed against it, the theory is that the sound waves are picked up by the magnet. he is some more on the single coil pickup theory. and here
"Single-coil pickups

The first electric guitars all used single-coil pickups. A single-coil pickup has only one coil of wire. It may have a single magnet, a single magnet with screws for adjustable pole pieces, or a separate magnet for each string. Regardless of the number and arrangement of magnets, it is still a single coil pickup if it has only one coil of wire.
Unfortunately, in addition to producing an electrical signal from a vibrating magnetic field, a coil of wire is a very efficient antenna. A coil of wire will "pluck" electromagnetic radiation out of the air, and we are surrounded everywhere by this radiation - most notably the sixty-cycle hum from building wiring, electrical noises from fluorescent lighting, and the most recent source of noise troubling guitarists with single coil pickups: the computer monitor. In short, single-coil pickups are susceptible to hum.

"The single-coil sound

Single-coil pickups have a thin, clean, and transparent sound. These pickups are usually about 3/4th of an inch wide and 2-1/2 inches long. Single-coil pickups are common on Fender guitars such as the Stratocaster and Telecaster, two guitars that are very common in rock, country, and pop. Some of the most notable users of the Fender Strat single-coil sound include Jimi Hendrix, Eric Clapton, and Stevie Ray Vaughan. Famous Telecaster players include Bruce Springsteen, Buck Owens, and Johnny Paycheck."

I ended up cutting up another thin magnet and fixing it to the banjo head, because I found the one installed was too small and that a bigger one helped pick up the volume and tone from all the strings equally, this was a problem, as some strings were much louder then the others.