Amateur Radio portable choke box for BNCs with tap holes, RG58 (tight), FT240-31 toroid

thingiverse

This is based on Paul01's 'Ham portable balun unun choke box' design, specifically his FT240 choke box, but with the SO239 holes swapped for the BNC + tap holes found in his balun box design. See https://www.thingiverse.com/thing:5225767 for Paul01's original designs. Thanks to Thomas for Tinkercad assistance :) Note: if you're using RG58 coaxial cable, the box is a bit tight in the circular part that holds the toroid. It'd probably be fine for RG174 coax, but should be expanded by a couple of mm for RG58. Mine's OK with RG58, but the sides have stretched slightly. Update 29/11/2023 - License amended at Paul01's request to be "Creative Commons - Attribution - Non-Commercial - No Derivatives" - Paul01 has permitted me to publish these modifications to his design.