Building and testing an eBay diplexer kit for 2m/70cm

The recent purchase of a UV-Pro has me in need of a satellite antenna for the "Easy-Sats" and International Space Station.Arrow makes the perfect antenna but I thought I could homebrew one at a much lower price.The main component that differentiates the Arrow from other dual-band Yagis is the diplexer, not duplexer, as it is incorrectly called by Arrow (and others).A search online located several