CHA HYBRID - MINI / MICRO
Page 12
Extend the Counterpoise.
16.
If using a counterpoise wire, extend it along the
ground under the antenna.
17.
Perform operational test.
Manpack Vertical
The CHA HYBRID - MINI / MICRO and CHA MIL WHIP Manpack Vertical configuration, see figure (4), is a broadband
short range HF/VHF-LO antenna. This configuration, which is especially designed to be manpackable, is
omnidirectional and provides ground wave communication on frequencies between 1.8
–
54.0 MHz without using
sky wave propagation. Performance is limited below 3.5 MHz, but very good above 24 MHz. A single 25 foot
counterpoise
“tail wire”
will provide a good compromise between portability and performance or you can use the
supplied 60 foot antenna wire as the counterpoise. An antenna tuner or coupler is required on most frequencies.
Figure 4. Manpack Vertical.
Site Selection and Preparation
1.
Select a site to deploy the CHA HYBRID - MINI /
MICRO Manpack Vertical configuration. Best
ground wave communication occurs when the
radio set is located in a clear area and the whip
antenna is vertical.
Refer to plates (1) and (3) for the following steps.
2.
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. .
3.
Attach a counterpoise wire to the Hybrid Base
by placing the counterpoise wire terminal lug
over the Counterpoise Connection (i) and
tightening the nut
(not supplied)
until snug.
4.
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
Hybrid Base.
Raise the Antenna.
5.
Extend the CHA MIL WHIP by unfolding the
sections of the whip, starting with the section
above the bottom section, and ensure each
section is fully seated onto section below until
the whip is fully extended.
6.
Connect the CHA MIL WHIP to the Hybrid Base
by carefully screwing
the 3/8” base stud
into the
Antenna Connection (h) until finger tight.
