For operation around 1600 KHz
Change these parts:
Change C23 from 820pF to 560pF.
C5 replace with 1800pF fixed capacitor, polycarbonate 1800J.
Remove L4, L5, L6, L7 and replace with a single toroid coil, 15 uH, 34 turns wound on a T106-2 iron core.
Set all S5 switch position to OFF.
-- Mike