For me 6dB RL is fine. That is a VSWR of 3:1. https://www.amphenolrf.com/vswr-conversion-chart
Dave KH6AQ On Fri, Jan 15, 2021 at 10:45 AM Jim Brown <[email protected]> wrote: > On 1/15/2021 12:09 PM, Tree wrote: > > Anything over 20 db is pretty good. 15 db is acceptable - 10 db is a > > little too much like for a transmit antenna. You can convert it to SWR > if > > that makes it make more sense. > > I have a different view of this issue, relating it to 1) will the > rig/power amp deliver full power to the line and 2) how much excess loss > is there due to the mismatch. My vintage Ten Tec Titans were happy > driving a 3:1 mismatch, and the excess loss on the 220 ft runs to my 160 > antennas with 2:1 VSWR is less than 0.1 dB, much less on the 40 ft run > to my Tee vertical. > > My 87A is far less forgiving about VSWR, starting to get unhappy with > more than about 1.8:1. And the tuner in my KPA1500 happily drives 3:1 or > higher VSWR. > > I am more concerned with VSWR on the higher bands, especially 6M, where > most of my feedlines are 300+ ft of 7/8 hardline. > > 73, Jim K9YC > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
