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 <jim@audiosystemsgroup.com>
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
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