Try transmitting up and down the band to see where your lowest swr is.
Then you can shorten or lengthen the antenna a bit to get a low swr in
the 28.4 mhz range. If you can't quite get it to 1:1, coiling the coax
at the feedpoint, 4 or 5 turns about 6 inches in diameter can get you
pretty close to 1:1.

2:1 isn't bad, but you're probably not getting full power output if
your rig is solid state.
=================================
When SWR is 2:1 the reflected power is only 11% of the tx output power,
which will hardly be noticeable at the receiving end .
Even when SWR would be 3:1 only 25% of the transmitter power would be
reflected , still resulting in only a fraction of an S-point at the
receiving end.
But a low SWR will make the solid state PA of your radio feel happier !

Frank GM0CSZ / KN6WH