An idea how to maximize the usability of my pickups.
Mess around with the capacitor to get the frequency response you are looking for.
My UltraSonics have 9K DC resistance per coil having Black and White as a pair (positive first when a north pole is applied)
and Green and Red as a pair (like wise when ground of the scope is connected to green).
I will be using single pole dual throw with an center off toggle switch
