Filter in a box
In 2018 I read this paper Band Pass Filter with Low Insertion Loss for 2m by Dipl ing Tasić Siniša –Tasa YU1LM/QRP, I made my PCB version for SMD components with a ground plane dimension of 50 x 20 mm so that a PCB of 10 x 10 cm houses 10 filter boards . I mounted my first prototype with tin shield box and verified that the filter was fine in 2018. The point was that the spacing of the inductors' turns requires some instrumentation to do easily the tuning. The tin shielding soldered box I made was quite laborious for me. So the pcbs has been unused for two years. I placed the PCB gerber files and scheme in repository https://github.com/ik1xpv/ExtIO_sddc/tree/master/hardware/Filters Now with the very nice SATSAGEN by Alberto IU1KVL the tuning of filter is fast and easy, see https://youtu.be/yjobY6vs4z0 . SATSAGEN requires a ADALM-Pluto or...