CHA HYBRID - MINI / MICRO
Page 13
Extend the Counterpoise
7.
Extend the counterpoise wire along the ground
in any convenient direction.
8.
Perform operational test.
Portable Vertical
The CHA HYBRID - MINI / MICRO and CHA MIL WHIP with CHA MIL EXT Portable Vertical configuration, see figure
(4), is a broadband short to medium range HF/VHF-LO antenna. This configuration, which is especially designed to
be portable, is omnidirectional and provides ground wave communication on frequencies between 1.8
–
54.0 MHz
without using sky wave propagation. It also provides sky wave propagation, especially above 12 MHz. Using the
optional CHA JAW MOUNT, the Portable Vertical can be mounted on almost any support, such as a camouflage
netting support pole, fence post, picnic table, or the optional Chameleon Antenna
TM
Tripod. The antenna works
better when mounted above the ground, but will provide satisfactory performance if ground mounted. One to
four counterpoise wires, 25 feet in length should be used. You may also use the supplied 60 foot antenna wire as
the counterpoise. All of these counterpoise options can be quickly deployed and will provide good performance.
The antenna may also be attached to a standard
3/8” mobile mount on a
stationary vehicle. No radials are
required when mounted on a vehicle. An antenna tuner or coupler is required on most frequencies. Use the
following procedure to install the Portable Vertical configuration.
Figure 5. Portable Vertical.
Site Selection and Preparation
1.
Select a site to deploy the CHA HYBRID - MINI /
MICRO Portable Vertical configuration. Best
ground wave communication occurs when the
radio set is located in a clear area and the whip
antenna is vertical.
2.
Clamp the CHA JAW MOUNT to the support.
Refer to plates (1) and (3) for the following steps.
3.
If attached, remove the Antenna Shackle (k)
from the Hybrid Base (a) by loosening the nut on
the Antenna Shackle and then unscrewing the
Antenna Shackle from the Antenna Connector
(h). Store in secure place.
Connect the Hybrid Base.
