2m/70cm Diplexer

thingiverse

This is a stencil for the KI0AG microdiplexer seen here: https://k0lee.com/duplexer.php as well as a box to hold it. You will need to trim the copper board to size, then use the diplexer.stl to make a stencil and paint the copper PCB. Once it dries, ensure that the painted area is isolated, as that will be the area with copper. Throw it in a PCB etchant solution and in 20min you'll have a PCB. Make sure all the copper pads are isolated, then solder on inductors/caps.