What are you using as a pickup?
ear bud headphone with back towards magnet.... on one channel in the pic. plugged close so as not to pick up sound.
previously tried a mic condensor, not any better.
previously tried bare end wires too, very close together..... seemed to work better.
tried a ceramic magnet for trigger, then tried rare earth magnets which are the ones in the pics. ceramic was better. want to try an iron magnet, but don't have a good one to use, need to get one.