If you check the swr and it needs adjusting.
Start by loosening the set screw that holds the
gamma match outer tube in shorting bar.
Move outer tube closer or farther away from
the SO-239 connector until lowest swr is found.
If swr is still to high, loosen the set screw on
shorting bar that holds it to the element.
Move the shorting bar closer or farther away
from SO-239 connector until the lowest swr is
found. A combination of both will yeild a flat swr
at the desired frequency.
Tighten set screws when done.
Measurments shown are a starting point only.