First tests with the new coil was a little deception however may still be useful
It end up with 6 layers of 80 turns
The magnetic field was 1mt near the ends and 0,5mT around
Although very small I I’ll test now if it will help avoid the field lines of the other coil in its region that would help the field to concentrate on the gap only
Now I’m just hooking the piezo to the tlv 3501 to see if can give a good square out of it