Final Adjustment for Setting the 12AVQ-S,
14AVQ-S and 18AVT-S Antennas
1. The antenna operates progressively from
10 thru the lowest band available. Even
though you may not be using 10 meters
at the present time, 10 meters must be ad-
justed because any adjustment made
between the base and the first trap
automatically changes all of the bands at
a later date.
2. Because every antenna installation is in-
fluenced by the soil conditions and the
proximity effect of nearby objects, the
dimension in the manual must be fine
tuned to put the antenna exactly where
you want it on each band.
A. If it favors the low end, shorten the 10
meter adjustment one inch (1") or no
more than 1 1/2 inches. Run another
VSWR measurement. You will now
have an indication of how far the
adjusted distance tuned the antenna in
your location. Additional adjustments
are indicated by the VSWR curve to put
10 meters exactly on the portion of the
band you desire as your center
operation frequency.
B. If the antenna favors the high end,
lengthen the dimension
correspondingly to move the antenna to
a lower frequency as outlined above.
4. Next, repeat this same procedure for 15
meters to put that band on frequency.
3. Beginning on 10 meters, make a VSWR
curve checking the low end, center, and
high end of the band. This will indicate if
the antenna favors the low end or the
high end as installed.
5: The same procedurd
is
then used to stt up
the 20 meter band, as well as the
remaining bands available, depending
upon the model involved.
6. Most verticals are monopole antennas or
half of a dipole. For this reason, the soil
conditions, when the antenna is ground
mounted, are important as it makes up the
other half of the antenna. When you roof
mount the antenna, radials must be used
as outlined in the assembly instruction
manual to provide the other half of the
antenna.
