Needed a 3 input 1 output low level RF switch for 100 MHz for a work project. Not wanting to pay $500-800 for some commercially available switches, I built this one for about $50. Used some Panasonic HD video relays, needed to be 24v and these fit the bill. Tested, <0.1dB insertion loss, <1.15:1 VSWR, >65dB port to port isolation. May also just be an excuse to play with the VNA upgrade on the Siglent Spectrum Analyzer.