50 Ω coax to 100 Ω and than each is combined in parallel in another coaxial T to form a 50Ω load for the transmission line to the radio equipment. The author used 50Ω Type N connectors and Ts for all connections. While these are somewhat more expensive than the UHF type, they are recommended for use at VHF and above because they offer a constant impedance. In addition they are waterproof if properly assembled.