Just been playing here with a design for the 60m band which may be
of use to U2'ers, or Hans if he's requiring a 60m LPF design.
Take one of the 80m LPF's.
L1 = 23 TURNS (WAS 25)
L2 = 24 TURNS (WAS 27)
L3 = 23 TURNS (WAS 25)
Change C1 and C4 change to 680pf
C2 and C3 remain at 1200pf.
So all you really need in terms of new components are 2 x 680pf caps!
1st harmonic is -58db down
2nd harmonic is -79db down
73 de Andy G0FTD
