Changing the coax feeding the antenna to a good quality low loss grade,
followed
by tuning the antenna for the frequency range your using, would give more
useful benefits. The receive improvement gained here, is also not to be
sniffed at.

Just how do you tune an antenna? In the old CB days we would ajdust the
lenght of the antenna until we got a good SWR. I can't see cutting into
the tail of my LS6 to do that.

Tony V.