A Lightweight 2m Yagi for SOTA. The boom is 20mm PVC electrical conduit and the elements are 2.4mm aluminium TIG welding rod. The antenna is carried as a single length of conduit with the elements stowed inside the boom, sealing them in with a bung. The driven element is connected directly to 50 Ohm coax with a BN-43-202 balun core to decouple the coax shield.
Ham Radio 3D Models published on Thingiverse, includes several parts for homebrewing amateur radio antennas, like spreaders, isolators a and mounts, wire antenna winders, adapters and many other accessories useful to antenna homebrewers.