I see that I mis-wrote ">With a 50 ohm load, the mismatch on a 75 ohm line can be up to 2.25:1," What I meant was the mismatch WITH a 75 ohm line, not "on" The 75 ohm line can transform a 50 ohm load up to as bad as a 2.25:1 mismatch w.r.t. 50 ohms.