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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.



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