QRV since 1993.
In the OptiCoil program you can design each coil with different parameters.
Green box Freq: Center frequency of the band pass filter
Red box L des: Coil value in uH per design
Blue box: Wire diameter and amount of turns
Pink box: Diameter (center of wire) of the coil and length. Diameter= inside + 1 time the wire diameter!
The diameter is limited by the enclosure.
Keep some distance between the topside of the coil and the enclosure.
Purple box: Fill in the Test C value.
For L2 this can be filter C3’s per design (Cheby filter) or a temporary C3
(Causer filter) L1 needs to have a temporarily C1 installed in order to tune.