With two rotary capacitors and a coil you can tinker a "hand tuned antenna preselector".
L1 is wound on a 18mm plastic tube with 10 turns, a 0,5mm copper wire and a lengh of 19mm. On the 5th turn he has a tap for C1. On the 1th turn L1 is groundet. L2 has 2 windings over L1 and has the groundet tab in the middle.
I made my tuner "prototype" from relics in my hobby room. On the WEB you can find better construction proposals.
Important to remember is that C2 and L1 is a parallel resonant cirquit for the respective frequency. C1 "tunes" the impedance right for the antenna input of the receiver.
Left side input - right side output (antenna).
In this graph you can see the "preselector"-characteristics of the tuner and the bad "Q" of the coil on higher frequencies (it means poor coil quality).
My next "Z-MATCH" will be a better one... :-)