b. Improvising a whip antenna. If the top portion of a whip antenna is
unusable, use a tree limb or pole to support an improvised wire antenna (Fig
If the correct length cannot be determined by measuring, use the
Since whip antennas are quarter-wave antennas, the answer to
the formula L =
must be divided by 2.
If other wire is not readily available, use WD-1/TT field wire (twisted
To make the twisted pair act as a single conductor, remove
approximately 1 1/2, inches of insulation from each end, and twist the bare
leads together (Fig 35). Now, splice the wire to the base antenna stub, and
tie (tape) the wire to the pole.
Lash the pole to the antenna base (Fig
Using WD-1/TT as a single conductor.
If mobility is not an immediate
requirement, you may wish to improvise a vertical antenna. The problem of
line-of-sight may be overcome by placing this antenna on top of a hill or
fastening it to a tree or pole to increase its height above surrounding
Figures 36 and 37 show ways to support improvised vertical
antennas. These antennas are relatively easy to prepare and emplace.