CHA EMCOMM II V2
Page 10
7.
Using a Bowline or similar knot, tie the end
of a short length (around 4 feet) of Paracord
to the Carabiner from step (3).
8.
Drive a Stake into the ground closest to the
location of the radio set and tie the
Paracord from the Matching Transformer to
the Stake using two Half Hitches, or similar
knot.
9.
Using a Bowline, or similar knot, tie a long
length (50 feet or more) of Paracord to the
Isolation Loop (c) at the end of the Antenna
Wire.
10.
Using a throw weight or some other
method, loop the Paracord over the other
support.
11.
Raise the end of the Antenna Wire to the
desired height, such that the Antenna Wire
is not quite taut, and secure it to the
support using a Round Turn and two Half
Hitches, or similar knot.
Extend the Counterpoise.
12.
If using a counterpoise wire, extend it along
the ground in any convenient direction
away from the Antenna Wire.
13.
Perform operational test.
Inverted
“
L
”
The CHA EMCOMM II V2 Inverted
“L” configuration, see figure (5
), is a broadband short to medium
range HF antenna. This configuration tends to be unidirectional, favoring the horizontal end of the
antenna. It also provides effective ground waves communication during the day time on frequencies
between 1.8
–
4.0 MHz without using sky wave propagation. The
Inverted “L”
requires two supports
and should be mounted at a height of 25 feet for best performance. Though, it will provide good
performance at a height of 10 to 20 feet, and is usable when mounted as low as three feet. One
counterpoise wire, with a length of 20 - 40 feet, is recommended. If a counterpoise is not used, the
coaxial cable must be 25 to 100 feet in length, as the shield of the coaxial cable provides the
counterpoise.
Figure 5. Inverted
“
L
”
Configuration.
