Ed G wrote:
w5dxp wrote:
My SG-230 manual says NOT to connect any transmission
line to the tuner output - to connect only an antenna.

SGC manual for the SG-237 says it is recommended to mount the coupler at
the antenna feedpoint, but it will work on anything, including balanced
line. They show a similar example to what we are doing in the manual.

Perhaps the SG-237 has some protection that the SG-230
didn't have? The wording in the SG-230 manual suggests
that, since the autotuner is capable of developing
voltages high enough to cause open-circuited coax
to arc, discretion is advised.
--
73, Cecil http://www.w5dxp.com