CHA EMCOMM II V2
Page 8
Site Selection and Preparation.
1.
Select a site to deploy the CHA EMCOMM II
V2 Horizontal NVIS
configuration. The site
must have two supports that will position
the Matching Transformer and the end of
the Antenna Wire to be at a height of
between 10 and 12 feet and 60 feet apart.
Higher or lower heights may be used, but
may reduce NVIS performance.
2.
If not already attached, connect a Carabiner
(d) to the Wire Connector (e) end of the
Antenna Wire.
Connect the Matching Transformer. Refer to
plate (3) for steps (3)
–
(5).
Plate 3. Matching Transformer Electrical and
Mechanical Connections.
3.
Connect the Carabiner from the Antenna
Wire to the Transformer Eyebolt (j).
4.
Connect the Wire Connector from the
Antenna Wire to the Top Transformer
Connection (h). Tighten the wing nut finger
tight.
5.
If using a counterpoise wire, connect it to
the Bottom Transformer Connection (i).
Tighten the wing nut finger tight.
6.
Connect a CHA RFI CHOKE and coaxial cable
or the Integrated RF Choke end of the CHA
Coaxial Cable assembly to the UHF Socket
(g) on the Matching Transformer.
Raise the Antenna.
7.
Using a Bowline or similar knot, tie the end
of a long length (25 feet or more) of
Paracord to the Carabiner from step (3).
8.
Using a throw weight or other method, loop
the Paracord over the support that is
closest to where the radio set will be
located.
9.
Raise the Matching Transformer end of the
antenna to a height of 10 to 12 feet and
secure it to the support using a Round Turn
and two Half Hitches, or similar knot.
10.
Using a Bowline, or similar knot, tie another
long length of Paracord to the Isolation
Loop (c) at the end of the Antenna Wire.
11.
Using a throw weight, or some other
method, loop the Paracord over the other
support.
12.
Raise the end of the Antenna Wire to a
height of 10 to 12 feet, such that the
Antenna Wire is not quite taut, and secure
it to the support using a Round Turn and
two Half Hitches.
Extend the Counterpoise.
13.
If using a counterpoise, extend it along the
ground under the raised portion of
antenna.
14.
Perform operational test.
