Chameleon Antenna CHA MPAS 2.0 User manual

HF Modular Portable
Antenna System 2.0
(CHA MPAS 2.0)
Operator’s Manual
Nevada - USA
WWW.CHAMELEONANTENNA.COM
VERSATILE –DEPENDABLE –STEALTH –BUILT TO LAST

CHA MPAS 2.0 Page 2
Table of Contents
Introduction ........................................................................................................................................3
HF Propagation....................................................................................................................................4
Parts of the Antenna............................................................................................................................5
Antenna Configurations.......................................................................................................................8
Manpack Vertical.............................................................................................................................8
Portable Vertical............................................................................................................................10
Horizontal NVIS..............................................................................................................................11
Sloping Wire ..................................................................................................................................12
Inverted “L”................................................................................................................................... 14
End-Fed Inverted “V”.....................................................................................................................15
Dipole............................................................................................................................................16
Loops.............................................................................................................................................17
Vehicle Installation ........................................................................................................................18
Recovery Procedure ..........................................................................................................................19
Troubleshooting ................................................................................................................................19
Specifications ....................................................................................................................................20
Warranty...........................................................................................................................................20
Accessories........................................................................................................................................24
Chameleon AntennaTM Products .......................................................................................................25
References ........................................................................................................................................25
WARNING! Never mount this, or any other antenna near power lines or utility wires! Any materials:
ladders, ropes, or feedlines that contact power lines can conduct voltages that kill. Never trust insulation to
protect you. Stay away from all power lines.
WARNING! Never operate this antenna where people could be subjected to high levels of RF exposure,
especially above 10 watts or above 14 MHz. Never use this antenna near RF sensitive medical devices, such as
pacemakers.
!
!

CHA MPAS 2.0 Page 3
LEGO® is a trademark and/or copyright of the LEGO Group. ©2016 the LEGO Group. All rights reserved.
All information on this product and the product itself is the property of and is proprietary to Chameleon
AntennaTM. Specifications are subject to change without prior notice.
Introduction
Thank you for purchasing and using the Chameleon AntennaTM High Frequency (HF) Modular Portable Antenna
System 2.0 (CHA MPAS 2.0). The CHA MPAS 2.0 is designed to be the most versatile, high performance, and
rugged portable / man-packable HF antenna available using the “LEGO® BLOCK” approach, as described by Survival
Tech Nord. The CHA MPAS 2.0 has several product improvements over the original MPAS, which were designed to
improve the overall performance, portability, and durability of the antenna system. We believe the CHA MPAS 2.0
is the best modular portable HF antenna system in the world.
The core components of the antenna system, see plate (1), are: a CHA HYBRID-MICRO or CHA HYBRID-MINI (special
order for Government/Military, Non-Governmental Organization (NGO), and commercial use) matching unit and
antenna base, 73 feet of antenna wire, 25 feet of counterpoise wire, a 9’4” military-style collapsible whip antenna
(CHA MIL WHIP 2.0), a 8’9” military-style antenna extension (CHA MIL EXT 2.0), an in-ground antenna mount (CHA
SPIKE), a coaxial cable with an integrated Radio Frequency Interference (RFI) choke and UHF Connectors (Type N
Connector available on one end as a special order for Government/Military, Non-Governmental Organization
(NGO), and commercial use), and a military-style olive green backpack. Available high-performance options (sold
separately) include a counterpoise (radial) kit (CHA COUNTERPOISE KIT), a high-efficiency capacity hat (CHA CAP
HAT), a clamp-on antenna mount (CHA JAW MOUNT), and a Universal Guying System (CHA UGS). The components
of the CHA MPAS 2.0 provide a continuum of portability and performance to meet your communications
requirements.
Plate 1. MPAS 2.0 Core Components.
The integral broadband impedance matching
network transformer of the CHA HYBRID MICRO 2.0
allows broadband antenna tuning. The antenna will
operate continuously from 1.8 –54.0 MHz (including
160m –6m amateur bands) without any adjustment
with a wide range antenna tuner or coupler (the
shortest configuration has limited performance
below 3.5 MHz). The CHA MPAS 2.0 is perfect for
Government/Military, Non-Governmental
Organizations (NGO), and Emergency Preparedness
and Survival Communication. It is also the antenna
for hams that enjoy camping, hiking, biking or other
types of outdoor recreation which require
communication gear to be both effective and highly
portable. The CHA MPAS 2.0 is configurable to
facilitate Near-Vertical Incident Sky wave (NVIS)
communication and is totally waterproof. The CHA
MPAS 2.0 requires a wide range antenna tuner or
coupler. Antennas built by Chameleon AntennaTM
are versatile, dependable, stealthy, and built to last.
Please read this operator’s manual so that you may
maximize the utility you obtain from your CHA MPAS
2.0.

CHA MPAS 2.0 Page 4
HF Propagation
HF radio provides relatively inexpensive and reliable local, regional, national, and international voice and data
communication capability. It is especially suitable for undeveloped areas where normal telecommunications are
not available, too costly or scarce, or where the commercial telecommunications infrastructure has been damaged
by a natural disaster or military conflict.
Although HF radio is a reasonably reliable method of communication, HF radio waves propagate through a
complex and constantly changing environment and are affected by weather, terrain, latitude, time of day, season,
and the 11-year solar cycle. A detailed explanation of the theory of HF radio wave propagation is beyond the
scope of this operator’s manual, but an understanding of the basic principles will help the operator decide what
frequency and which of the CHA MPAS configurations will support their communication requirements.
HF radio waves propagate from the transmitting antenna to the receiving antenna using two methods: ground
waves and sky waves.
Ground waves are composed of direct waves and surface waves. Direct waves travel directly from the transmitting
antenna to the receiving antenna when they are within the radio line-of-sight. Typically, this distance is 8 to 14
miles for field stations. Surface waves follow the curvature of the Earth beyond the radio horizon.
They are usable, during the day and under optimal
conditions, up to around 90 miles, see table (1). Low
power, horizontal antenna polarization, rugged or
urban terrain, dense foliage, or dry soil conditions
can reduce the range very significantly. The U.S.
Army found that in the dense jungles of Vietnam, the
range for ground waves was sometimes less than
one mile.
Frequency
Distance
Frequency
Distance
2 MHz
88 miles
14 MHz
33 miles
4 MHz
62 miles
18MHz
29 miles
7 MHz
47 miles
24 MHz
25 miles
10 MHz
39 miles
30 MHz
23 miles
Table 1. Maximum Surface Wave Range by Frequency.
Sky waves are the primary method of HF radio wave propagation. HF radio waves on a frequency below the critical
frequency (found by an ionosonde) are reflected off one of the layers of the ionosphere and back to Earth between
300 and 2,500 miles, depending upon the frequency and ionospheric conditions. HF radio waves can then be
reflected from the Earth to the ionosphere again during multi-hop propagation for longer range communication.
The most important thing for the operator to understand about HF radio wave propagation is the concept of
Maximum Usable Frequency (MUF), Lowest Usable Frequency (LUF), and Optimal Working Frequency (OWF). The
MUF is the frequency for which successful communications between two points is predicted on 50% of the days of
in a month. The LUF is the frequency below which successful communications are lost due to ionospheric loses.
The OWF, which is somewhere between the LUF and around 80% of the MUF, is the range of frequencies which
can be used for reliable communication. If the LUF is above the MUF, HF sky wave propagation is unlikely to occur.
The HF part of the Radio Frequency (RF) spectrum is usually filled with communications activity and an
experienced operator can often determine where the MUF is, and with less certainty, the LUF by listening to where
activity ends. The operator can then pick a frequency in the OWF and attempt to establish contact. Another
method is using HF propagation prediction software, such as the Voice of America Coverage Analysis Program
(VOACAP), which is available at no cost to download or use online at www.voacap.com.The operator enters the
location of the two stations and the program show a wheel with the predicted percentage of success based on
frequency and time. ALE, which is the standard for interoperable HF communications, is an automated method of
finding a frequency in the OWF and establishing and maintaining a communications link.

CHA MPAS 2.0 Page 5
Even under optimal conditions, there is a gap between where ground waves end (around 40 to 90 miles) and the
sky wave returns to Earth on the first hop (around 300 miles). NVIS propagation can be used to fill this gap. The
frequency selected must be below the critical frequency, so NVIS is can normally only be used on frequencies from
around 2 to 10 MHz. Frequencies of 2 –4 MHz are typical at night and 4 –8 MHz during the day.
Parts of the Antenna
The CHA MPAS 2.0 is comprised of the following assemblies and components, see plates (2) through (4):
a. Hybrid Micro
The Hybrid Micro provides a mounting base and impedance matching for the CHA MPAS 2.0. The CHA Hybrid
Mini performs the same function, and has the same electrical and mechanical connections as the Hybrid
Micro, but is slightly larger and heavier.
b. Antenna Wire
The Antenna Wire is a 73-foot length of black insulated wire wound on a line winder (e).
c. Isolation Loop
An Isolation Loop is permanently attached to both ends of the Antenna Wire (b). There is also a floating
Isolation Loop which is used to suspend the Antenna Wire anywhere in the middle for Inverted “V” and
Inverted “L” antenna configurations (see Configurations section).
Plate 2. Hybrid Micro.
d. Carabiner
The Carabiner is a removable pear-shaped stainless-steel hook with a spring-loaded gate used for mechanical
connections.

CHA MPAS 2.0 Page 6
e. Line Winder
The Line Winder is used to store the Antenna Wire (b) and Counterpoise Wire (k). It enables rapid deployment
and recovery of the CHA MPAS 2.0.
f. Wire Connector
The Wire Connectors are terminal lugs located at one end of the Antenna Wire (b) and Counterpoise Wire (k).
g. UHF Connector Socket
The UHF Connector Socket, SO-239, is located on the side of the Hybrid Micro (a).
Plate 3. Antenna Wire Assembly.
h. Antenna Connection
The Antenna Connection is located on the top of the Hybrid Micro (a). It is a 3/8” x 24 (fine thread) female
fitting.
i. Base Connection
The Base Connection is located on the bottom of the Hybrid Micro (a). It is a 3/8” x 24 (fine thread) male
fitting. This fitting provides mechanical connection to the Spike Mount (l). It is also used for the ground
connection when not using the Spike Mount (l).
j. Antenna Shackle
The Antenna Shackle, see plate (5), consists of a shackle, bolt, and nut. It is attached to the top of the Hybrid
Micro (a).

CHA MPAS 2.0 Page 7
k. Counterpoise Wire (not shown)
The Counterpoise Wire, not shown, consists of 25 feet of black insulated wire with a Wire Connector (f) on one
end and wound on a line winder (e).
Plate 4. Whip Antenna and Spike Mount Connections.
l. Spike Mount
The Spike Mount (CHA SPIKE) is stainless-steel spike with a 3/8” x 24 (fine thread) female fitting and knurled
knob, used as the in-ground mount for the vertical antenna configuration.
m. Ground Connection
The Ground Connection is used as the electrical connection point for the Counterpose Wire (k).
n. Mount Connection
The Mount Connection is used as the mechanical connection point for the Hybrid Micro (a).
o. Whip Antenna
The Whip Antenna (CHA MIL WHIP 2.0) is a military-style collapsible whip antenna. It can be used with the
Hybrid Micro (a) only or with the Hybrid Micro and Antenna Extension (q) (see Configuration section).
p. Whip Base
The Whip Base is used to connect the Whip Antenna (o) to the Hybrid Micro (a).
q. Antenna Extension
The Antenna Extension is used to increase the length of the Whip Antenna (o) which significantly increases the
performance of the MPAS 2.0, especially on lower frequencies.
r. Extension Connection
The Extension Connection is used to connect the Whip Antenna (o) to the Antenna Extension (q).

CHA MPAS 2.0 Page 8
s. Extension Base
The Extension Base is used to connect the Antenna Extension (q) to the Hybrid Micro (a).
t. Coaxial Cable (not shown)
The Coaxial Cable (CHA 50’ COAX) consist of 50 feet of 50 Ohm coaxial cable with an integrated Radio
Frequency Interference (RFI) choke. Both ends of the coaxial cable are terminated with a UHF Connector Plug
(PL-259 or a Type N Connector on one end, which is available as a special order for Government/Military, Non-
Governmental Organization (NGO), and commercial use).
u. Backpack (not shown)
The Backpack, not shown, is an olive-green military-style backpack used to store the components of the MPAS
2.0.
Antenna Configurations
Using the supplied components*, the CHA MPAS 2.0 can be deployed into a number of operationally useful
configurations. Six configurations, see table (2), are described in this manual, each with unique performance
characteristics. *Note: you will also need approximately 50 feet of Paracord or other low-stretch synthetic line, a
tent stake, and a plastic mallet.
Configuration
Ground
Short
Medium
Long
Directionality
Manpack Vertical
↕
Omnidirectional
Portable Vertical
↕
↑
Omnidirectional
Horizontal NVIS
↓
↑
Omnidirectional
Sloping Wire
↓
↕
Unidirectional
Inverted “L”
↓
↕
Bidirectional
End-Fed Inverted “V”
↕
↓
↑
Bidirectional
Table 2. Antenna Configuration Selection.
The table can assist the operator to quickly select the most appropriate antenna configuration to meet their
operational requirements. To use the table, decide which distance column (Ground = 0 to 90 miles, Short = 0 - 300
miles, Medium = 300 –1500 miles, Long > 1500 miles) best matches the distance to the station with whom you
need to communicate. Then, determine if the OWF is in the lower (↓ = 1.8 – 10 MHz) or upper (↑ = 10 – 30 MHz)
frequency range. Finally, select the antenna configuration with the corresponding symbol in the appropriate
distance column. All CHA MPAS 2.0 configurations provide some capability in each distance category, so
depending upon the complexity of your communications network, you may need to select the best overall
configuration. The directionality column indicates the predominate directionality characteristic of the antenna
configuration. When using NVIS, all the configurations are omnidirectional. Most configuration and frequency
combinations will require a wide range antenna tuner or coupler.
Manpack Vertical
The CHA MPAS 2.0 Manpack Vertical configuration is a broadband short-range HF/VHF-LO antenna. This
configuration, see figure (1), use four components from the CHA MPAS 2.0: CHA MIL WHIP 2.0, CHA HYBRID MINI

CHA MPAS 2.0 Page 9
2.0, Counterpoise Wire, and CHA COAX 50’ (a shorter 50 Ohm coaxial cable (not included) may be substituted to
increase portability in this configuration).It is especially designed to be man-packable, 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. The included 25-foot
counterpoise “tail wire” provides a good compromise between portability and performance. An antenna tuner or
coupler is required on frequencies below 10 MHz. Use the following procedure to install the Manpack Vertical
configuration.
Figure 1. Manpack Vertical.
Site Selection and Preparation
1. Select a site to deploy the CHA MPAS 2.0
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 (2) - (5) for the following steps.
2. If attached, remove the Antenna Shackle (j)
from the Hybrid Micro (a) by loosening the nut
on the Antenna Shackle and then unscrewing
the Antenna Shackle from the Antenna
Connector (h).
3. Store in backpack (u).
Connect the Hybrid Micro.
4. Temporarily remove one nut from the Base
Connection (i) of the Hybrid Micro.
5. Attach the Counterpoise Wire (k) to the Hybrid
Micro by placing the Wire Connector (f) over the
Base Connection (i). Replace and tighten the
nut until snug.
6. Connect the UHF Connector Plug at the
Integrated RFI Choke end of the Coaxial Cable (t)
to the UHF Connector Socket (g) on the Hybrid
Micro. A shorter 50 Ohm coaxial cable (not
included) may be substituted to increase
portability in this configuration.
Raise the Antenna.
7. Extend the Whip Antenna (o) by unfolding the
sections of the whip, starting with the section
above the bottom section. Ensure each section
is fully seated onto section below until the whip
is fully extended.
8. Connect the Whip Antenna to the Hybrid Micro
by carefully threading the Whip Base (p) into the
Antenna Connection (h) until finger tight.
Extend the Counterpoise
9. Extend the Counterpoise Wire along the ground
in any convenient direction.
10. Perform operational test.

CHA MPAS 2.0 Page 10
Portable Vertical
The CHA MPAS 2.0 Portable Vertical configuration, is a broadband short to medium range HF/VHF-LO antenna.
This configuration, see figure (2), use six components from the CHA MPAS 2.0: CHA MIL WHIP 2.0, CHA MIL EXT
2.0, CHA HYBRID MINI 2.0, Counterpoise Wire, CHA SPIKE MOUNT, and CHA 50’ COAX. 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. The antenna is normally ground mounted using the Spike Mount, but can be mounted on almost
any support, such as a camouflage netting support pole, fence post, picnic table using the optional CHA JAW
MOUNT. The optional counterpoise radials (CHA COUNTERPOISE KIT), capacity hat (CHA CAP HAT), and guying
system (CHA UNIVERSAL GUYING SYSTEM) will improve the performance of the Portable Vertical configuration. An
antenna tuner or coupler is required on most frequencies below 10 MHz. Use the following procedure to install
the Portable Vertical configuration.
Figure 2. Portable Vertical.
Site Selection and Preparation
1. Select a site to deploy the CHA MPAS 2.0
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. Drive the Spike Mount (l) into the ground. Use a
plastic mallet to avoid damage to the Spike
Mount threaded socket.
Refer to plates (2) - (5) for the following steps.
3. If attached, remove the Antenna Shackle (j)
from the Hybrid Micro (a) by loosening the nut
on the Antenna Shackle and then unscrewing
the Antenna Shackle from the Antenna
Connector (h).
4. If attached, remove the nuts from the Base
Connection (i) on the bottom of the Hybrid
Micro.
5. Store unused components in the backpack (u).
Connect the Hybrid Micro.
6. Connect the Wire Connector (f) from the end of
the Counterpoise Wire (k) to the Ground
Connection (m) on the side of the Spike Mount.
7. Thread the Hybrid Micro Base Connection into
the Mount Connection (n) of the Spike Mount
until finger tight.

CHA MPAS 2.0 Page 11
8. Connect the UHF Connector Plug at the end of
the Coaxial Cable (t) with the RFI Choke into the
UHF Connector Socket (g) on the Hybrid Micro.
Raise the Antenna
9. Extend the Antenna Extension (q) by unfolding
each section, starting at the top, and seating it
onto the section below until all sections have
been seated.
10. Extend the Whip Antenna (o) by unfolding the
sections of the whip, starting with the section
above the bottom section. Ensure each section
is fully seated onto section below until the whip
is fully extended.
11. Connect the Whip Antenna to the Antenna
Extension by carefully threading Whip Base (p)
into the Extension Connection (r) on top of the
Antenna Extension until finger tight.
12. Connect the Antenna Extension to the Hybrid
Micro by carefully threading the Extension Base
(s) on the bottom of the Antenna Extension into
the Antenna Connection on top of the Hybrid
Micro until finger tight.
Extend the Counterpoise
13. Extend the Counterpoise Wire along the ground
in any convenient direction.
14. Perform operational test.
Horizontal NVIS
The CHA MPAS 2.0 Horizontal NVIS configuration, see figure (3), is a special configuration designed to provide good
NVIS propagation on lower frequencies. It is predominately omnidirectional and also provides medium range sky
wave propagation on frequencies above 10 MHz. It requires two supports that will enable the ends of the antenna
to be raised to a height of 10 –12 feet and 73 feet apart. The Horizontal NVIS configuration uses four components
of the CHA MPAS 2.0: CHA HYBRID 2.0, Antenna Wire, Counterpoise Wire, and CHA 50’ COAX. Use the following
procedure to install the Horizontal NVIS configuration.
Figure 3. Horizontal NVIS Configuration.
Site Selection and Preparation.
1. Select a site to deploy the CHA MPAS 2.0
Horizontal NVIS configuration. The site must
have two supports that will position the Hybrid
Micro and the end of the Antenna Wire to be at
a height of between 10 and 12 feet and 73 feet
apart. Lower heights may be necessary in the
desert, on a beach, or on snow covered ground.
Refer to plates (2)-(5) for the following steps.
2. If not already attached, connect the Carabiner
(d) to the Isolation Loop (c) at the Wire
Connector (f) end of the Antenna Wire (b).
Connect the Hybrid Micro.
3. Temporarily remove the Antenna Shackle (j)
from the Antenna Connection (h). Place the
Wire Connector from the Antenna Wire over the

CHA MPAS 2.0 Page 12
Antenna Connection and replace the Antenna
Shackle. Tighten the nut snugly.
4. Connect the Carabiner from the Antenna Wire
to the Antenna Shackle.
5. Temporarily remove the nut from the Base
Connection (i) of the Hybrid Micro.
6. Connect the Wire Connector at the end of the
Counterpoise Wire (k) to the Base Connection.
Replace the nut and tighten snugly.
Plate 5. Hybrid Micro / Mini Connections.
7. Connect the UHF Connector Plug at the end of
the Coaxial Cable (t) with the RFI Choke to the
UHF Connector Socket (g) on the Hybrid Micro.
Raise the Antenna.
8. Using a Bowline or similar knot, tie the end of a
long length (25 feet or more) of Paracord (not
supplied) to the Carabiner.
9. Using a throw weight or other method, loop the
Paracord over the support that is closest to
where the radio set will be located.
10. Raise the Hybrid Micro 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.
11. Using a Bowline, or similar knot, tie another long
length of Paracord to the Isolation Loop at the
end of the Antenna Wire.
12. Using a throw weight, or some other method,
loop the Paracord over the other support.
13. Raise the end of the Antenna Wire to a height of
10 to 12 feet, such that the Antenna Wire is
horizontal, but not quite taut, and secure it to
the support using a Round Turn and two Half
Hitches.
Extend the Counterpoise.
14. Extend the Counterpoise Wire down from the
Hybrid Micro and then along the ground under
the antenna, as shown in figure (3).
15. Perform operational test.
Sloping Wire
The CHA MPAS 2.0 Sloping Wire configuration, see figure (4), is a broadband short to medium range HF antenna. It
is a good general-purpose antenna, which provides acceptable ground wave and sky wave propagation, and can be
hastily deployed. This configuration is predominately omnidirectional, becoming slightly unidirectional towards
the end of the antenna wire as the frequency increases. The Sloping Wire requires one support and should be
mounted at a height of 25 to 40 feet for best performance. The Sloping Wire configuration uses five of the CHA
MPAS 2.0 components: CHA HYBRID MICRO, Antenna Wire, Counterpoise Wire, CHA SPIKE MOUNT, and CHA 50’
COAX. Use the following procedure to install the Sloping Wire configuration.
h
d
j
b
c
a
f

CHA MPAS 2.0 Page 13
Figure 4. Sloping Wire Configuration.
Site Selection and Preparation.
1. Select a site to deploy the CHA MPAS 2.0 Sloping
Wire configuration. The site must have a
support that will position the end of the
Antenna Wire at a height of 25 to 40 feet. If the
right support is unavailable, any convenient
object, such as a fence post or the top of a
vehicle, may be used as a field expedient
support with reduced performance.
Refer to plates (2) - (5) for the following steps.
Raise the Antenna.
2. Using a Bowline, or similar knot, tie a long
length (50 feet or more) of Paracord (not
supplied) to the Isolation Loop (c) at the far end
of the Antenna Wire (b).
3. Using a throw weight or some other method,
loop the Paracord over the support.
4. Raise the end of the Antenna Wire to the
desired height and secure it to the support using
a Round Turn and two Half Hitches, or similar
knot.
5. Fully extend the Antenna Wire so that it is not
quite taut.
Install the Spike Mount.
6. Drive the Spike Mount (l) into the ground near
the low end of the Antenna Wire. Use a plastic
mallet to avoid damage to the Spike Mount
threaded socket.
7. If installed, remove the nuts from the Base
Connection (i) of the Hybrid Micro (a).
8. Store the nuts in the backpack (u).
9. Thread the Base Connection of the Hybrid Micro
(a) into the Mount Connection (n) of the Spike
Mount until hand tight.
Connect the Hybrid Micro.
10. If not already attached, connect a Carabiner (d)
to the Isolation Loop at the Wire Connector (f)
end of the Antenna Wire.
11. Temporarily remove the Antenna Shackle (j)
from the Antenna Connection (h).
12. Place the Wire Connector from the Antenna
Wire over the Antenna Connection and replace
the Antenna Shackle. Tighten the nut snugly.
13. Connect the Carabiner from the Antenna Wire
to the Antenna Shackle.
14. Connect the Wire Connector at the end of the
Counterpoise Wire (k) to the Ground Connection
(m) of the Spike Mount. Tighten snugly.
15. Connect the UHF Connector Plug at end of the
Coaxial Cable (t) with the RFI Choke to the UHF
Connector Socket (g) on the Hybrid Micro.
Extend the Counterpoise.
16. Extend the Counterpoise Wire along the ground
in any convenient direction.
17. Perform operational test.
ab
25- 40 ft
c
t
k
l

CHA MPAS 2.0 Page 14
Inverted “L”
The CHA MPAS Inverted “L” configuration, see figure (5), is a broadband short to medium range HF antenna. This
configuration tends to be unidirectional, favoring the end of the horizontal part 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. The Inverted “L” configuration uses five of the CHA MPAS 2.0 components: CHA
HYBRID MICRO, Antenna Wire, Counterpoise Wire, CHA SPIKE MOUNT, and CHA 50’ COAX. Use the following
procedure to install the Inverted “L” configuration.
Figure 5. Inverted “L”Configuration.
Site Selection and Preparation.
1. Select a site to deploy the CHA MPAS Inverted
“L” configuration. The site must have two
supports that will position the corner of the “L”
and the end of the Antenna Wire around 48 feet
apart at a height of about 25 feet. If the right
supports are unavailable, any convenient
objects, such as fence posts or the tops of
vehicles, may be used as a field expedient
supports with reduced performance.
Refer to plates (2) - (5) for the following steps.
Install the Spike Mount.
2. Drive the Spike Mount (l) into the ground near
one the supports. Use a plastic mallet to avoid
damage to the Spike Mount threaded socket.
3. If installed, remove the nut(s) from the Base
Connection (i) of the Hybrid Micro (a).
4. Store the nut(s) in the backpack (u).
5. Thread the Base Connection of the Hybrid Micro
(a) into the Mount Connection (n) of the Spike
Mount until hand tight.
Connect the Hybrid Micro.
6. If not already attached, connect a Carabiner (d)
to the Isolation Loop at the Wire Connector (f)
end of the Antenna Wire (b).
7. Temporarily remove the Antenna Shackle (j)
from the Antenna Connection (h).
8. Place the Wire Connector from the Antenna
Wire over the Antenna Connection and replace
the Antenna Shackle. Tighten the nut snugly.
9. Connect the Carabiner from the Antenna Wire
to the Antenna Shackle.
10. Connect the Wire Connector at the end of the
Counterpoise Wire (k) to the Ground Connection
(m) of the Spike Mount. Tighten snugly.
a
b
25 ft
c
k
t
l

CHA MPAS 2.0 Page 15
Raise the Corner of the “L”.
11. Using a Bowline, or similar knot, tie a long
length (50 feet or more) of Paracord (not
supplied) to the floating Isolation Loop (c) in the
middle of the Antenna Wire.
12. Using a throw weight or some other method,
loop the Paracord over the support.
13. Raise the corner of the “L” of the Antenna Wire
to the desired height and secure it to the
support using a Round Turn and two Half
Hitches, or similar knot.
Raise the End of the Antenna.
14. Using a Bowline, or similar knot, tie a long
length (50 feet or more) of Paracord to the
Isolation Loop at the end of the Antenna Wire.
15. Using a throw weight or some other method,
loop the Paracord over the support.
16. Raise and extend the end of the Antenna Wire
to the desired height, so that the top of the
antenna is horizontal and not quite taut, and
secure it to the support using a Round Turn and
two Half Hitches, or similar knot.
17. Connect the UHF Connector Plug at end of the
Coaxial Cable (t) with the RFI Choke to the UHF
Connector Socket (g) on the Hybrid Micro.
Extend the Counterpoise.
18. Extend the Counterpoise Wire along the ground
in any convenient direction.
19. Perform operational test.
End-Fed Inverted “V”
The CHA MPAS End-Fed Inverted “V” configuration, see figure (6), is a broadband medium to long range HF
antenna. This configuration tends to be bidirectional, favoring broadside to the antenna and will provides effective
ground and sky wave propagation. The End-Fed Inverted “V” configuration uses five of the CHA MPAS 2.0
components: CHA HYBRID MICRO, Antenna Wire, Counterpoise Wire, CHA SPIKE MOUNT, and CHA 50’ COAX. Use
the following procedure to install the End-Fed Inverted “V” configuration.
Figure 6. Inverted “V” Configuration.
1. Select a site to deploy the CHA MPAS End-Fed
Inverted “V”configuration. The site must have
one center support, around 25 feet high and
with 27 feet on each side for the ends of the
antenna. If the right supports are unavailable,
any convenient objects, such as fence posts or
the tops of vehicles, may be used as a field
expedient supports with reduced performance.
Refer to plates (2) - (5) for the following steps.
Raise the Center of the antenna.
2. Using a Bowline, or similar knot, tie a long
length (50 feet or more) of Paracord (not
supplied) to the floating Isolation Loop (c) in the
middle of the Antenna Wire (b).
3. Using a throw weight or some other method,
loop the Paracord over the support.
4. Raise the center of the Antenna Wire to the
desired height and secure it to the support using

CHA MPAS 2.0 Page 16
a Round Turn and two Half Hitches, or similar
knot. For optimum performance, the center
should be less than 37 feet high.
Install the Spike Mount.
5. Drive the Spike Mount (l) into the ground, near
the location of the radio set, around 27 feet
from the center of the antenna. Use a plastic or
mallet to avoid damage to the Spike Mount
threaded socket.
6. If installed, remove the nut(s) from the Base
Connection (i) of the Hybrid Micro (a).
7. Store the nut(s) in the backpack (u).
8. Thread the Base Connection of the Hybrid Micro
(a) into the Mount Connection (n) of the Spike
Mount until hand tight.
Connect the Hybrid Micro.
9. If not already attached, connect a Carabiner (d)
to the Isolation Loop (c) at the Wire Connector
(f) end of the Antenna Wire (b).
10. Temporarily remove the Antenna Shackle (j)
from the Antenna Connection (h).
11. Place the Wire Connector from the Antenna
Wire over the Antenna Connection and replace
the Antenna Shackle. Tighten the nut snugly.
12. Connect the Carabiner from the Antenna Wire
to the Antenna Shackle.
13. Connect the Wire Connector at the end of the
Counterpoise Wire (k) to the Ground Connection
(m) of the Spike Mount. Tighten snugly.
Raise the End of the Antenna.
14. Using a Bowline, or similar knot, tie a short
length (around six feet) of Paracord (not
supplied) to the Isolation Loop at the end of the
Antenna Wire.
15. Extend the end of the Antenna Wire so that it is
not quite taut.
16. Drive a tent peg (not supplied) into the ground
near the end of the extended antenna wire.
17. Secure the Paracord to the tent peg using a
Round Turn and two Half Hitches, or similar
knot.
18. Connect the UHF Connector Plug at the end of
the Coaxial Cable (t) with the RFI Choke to the
UHF Connector Socket (g) on the Hybrid Micro.
Extend the Counterpoise.
19. Extend the Counterpoise Wire along the ground
in any convenient direction.
20. Perform operational test.
Dipole
The dipole is the most basic antenna design. It consists of two identical length wires which are resonant at a
specific frequency. When used near the resonant frequency and installed around a quarter wavelength high, the
antenna has a figure eight radiation pattern broadside to the wire. The dipole will produce some NVIS skywave
propagation (especially when installed lower than a quarter wavelength in height) for short-range communication
as well as low elevation skywaves for longer range communication. The formula for calculating the length of each
side of a resonant dipole antenna is:
Length in feet = 234 / Frequency in MHz.
For example, if your operating frequency is 5.4 MHz, the length of each side of the dipole would be 234 / 5.4,
which equals 43.3 feet (43 ft 4 in). When using the Hybrid Micro (a) as the center of a dipole antenna, the antenna
is more broad-banded and does not necessarily need to be cut for a specific length. Two lengths of wire, (not
supplied) around 60 feet in length each, will permit operation from 1.8 to 54.0 MHz when using a wide range
antenna tuner or coupler.
When constructing a dipole antenna, connect one wire, using a 3/8” terminal lug (not supplied) to the Antenna
Connection (h) of the Hybrid Micro (a) and the other wire, also using a 3/8” terminal lug, to the Base Connection
(i). Use “dog bone”insulators and Paracord to suspend the antenna horizontally from both ends, and optionally in
the middle, as shown in figure (7). As described, this is a temporary configuration since there is no strain relief for
the connections.

CHA MPAS 2.0 Page 17
Figure (7). Horizontal Dipole.
Loops
A Vertical Loop antenna has a low angle of radiation and low receive noise, making it superior to dipoles and
verticals for long distance communication. A Horizontal Loop antenna will outperform a dipole when installed at a
lower height, making it a good choice for lower frequencies. The formula for calculating the entire length of a
resonant loop antenna is:
Length in feet = 1005 / frequency in MHz.
For example, if your operating frequency is 5.4 MHz, the length of the entire loop would be 1005 / 5.4, which
equals 186.1 feet (186 ft 1 in). As with the dipole antenna, when using the Hybrid Micro (a), the antenna is more
broad-banded and does not need to be cut for a specific length. Calculate the loop length for the lowest frequency
you plan to use and it will work for your other frequencies (when using a wide range antenna tuner or coupler).
When constructing a Vertical Loop, a triangle is the best shape. Divide the length of the loop by 1/3 to get the
length of each side of the triangle (forming an equilateral triangle). Install the Hybrid Micro (a) at the mid-point of
one of the vertical sides as shown in figure (8). Connect one side of the loop wire to the Antenna Connection (h),
using a 3/8” terminal lug (not supplied). Connect the other side of the loop wire to the Base Connection (i), also
using a 3/8” terminal lug. Use “dog bone”insulators and Paracord to suspend the antenna vertically from the top
two corners and with the other corner pointing down. As described, this is a temporary configuration since there
is no strain relief for the connections.
Figure (8). Loop Configurations.

CHA MPAS 2.0 Page 18
A square shape is best for a Horizontal Loop. Divide the length of the loop by 1/4 to get the length of each side of
the square. Install the Hybrid Micro (a) in one corner of the square, as shown in figure (8). Connect one side of the
loop wire to the Antenna Connection (h), using a 3/8” terminal lug (not supplied). Connect the other side of the
loop wire to the Base Connection (i), also using a 3/8” terminal lug. Use “dog bone”insulators and Paracord to
suspend the antenna horizontally from all four corners. As described, this is a temporary configuration since there
is no strain relief for the connections.
Vehicle Installation
The Hybrid Micro / Mini is excellent for vehicular use when used with a one-piece stainless-steel whip (not supplied
and the CHA MIL WHIP 2.0 is not designed for vehicle use when in motion). When used with the Hybrid Micro /
Mini, a 102” stainless-steel whip, such as those used for Citizen’s Band (CB) radios, will enable operation from 3.5
to 54.0 MHz. A heavy-duty ball-type mount, such as the Hustler SSM-2, is required when using a 102” whip.A 54”
inch stainless-steel whip will enable operations from 7.0 to 54.0 MHz. A heavy-duty lip mount, such as the
Diamond K400 or heavy-duty magnetic mount, such as the MFJ-336T Magnet Mount can be used with a 54” whip.
All three mounts are shown in plate (6). Fiberglass whips are not recommended due to their rigidity and high wind
resistance. The stainless-steel whips and antenna mounts described here are available from the quality retailers
that sell Chameleon AntennaTM products in their stores or on-line.
Plate (6). Vehicle Antenna Mounts.
Attach the Hybrid Micro / Mini (a) to these style mounts by threading the Base Connection (i) onto the 3/8” fitting
on the antenna mount, as shown in plate (7). The antenna is fed by attaching the UHF Connector Plug at the end
of the Coaxial Cable (t) to the UHF Connector Socket (g) on the side of the Hybrid Micro / Mini. The normal
antenna feed through the mount will not be used and instead a good RF ground connection needs to be made to
the vehicle body using a short, flat, braided wire. If using a Lip Antenna Mount, the hatchback or door to which it
is connected also needs to have a good RF ground to the vehicle.

CHA MPAS 2.0 Page 19
Plate (7). Hybrid Micro / Mini Electrical and Mechanical Connections.
Recovery Procedure
To recover the CHA MPAS, perform the following steps:
1. Disconnect the Coaxial Cable (t) from the radio set.
2. Lower the antenna to the ground or disconnect the Hybrid Micro (a) from the Spike Mount (l).
3. Disconnect the Coaxial Cable from the Hybrid Micro.
4. Carefully roll (do not twist) the Coaxial Cable.
5. Disconnect the Counterpoise Wire (k), wind it onto the Line Winder (e), and secure with attached shock cord.
6. If used, disconnect the Carabiner (d) from the Antenna Shackle (j).
7. Disconnect the Antenna Whip (o), Antenna Extension (q), or Antenna Wire (b), depending upon configuration
used, from the Hybrid Micro.
8. If used, wind the Antenna Wire onto the Line Winder and secure with attached shock cord.
9. If used, take down the CHA MIL EXT 2.0. Starting at the bottom, pull the section apart from the section above
and fold the section above over the section below. Repeat until all sections are apart. Secure the sections
together with provided sticky strap.
10. If used, take down the CHA MIL WHIP 2.0. VERY IMPORTANT! Starting at the top, pull the section apart from
the section below and fold the section above over the section below. Repeat until all sections are apart.
Secure the sections together with provided sticky strap.It is very important to take down the CHA MIL WHIP
2.0 beginning at the top. Failure to begin at the top may cause premature failure of the internal connecting
cord.
11. Pull the Spike Mount from the ground, if used.
12. Check area for overlooked antenna components.
13. Remove dirt from antenna components and inspect them for signs of wear.
14. Store components together in the backpack (u).
Troubleshooting
1. If using the Antenna Wire (b), ensure the Wire Connector (f) is securely connected.
2. Inspect the Antenna Wire or Whip for breakage, corrosion, or signs of strain.

CHA MPAS 2.0 Page 20
3. Ensure the UHF Connector Plugs are securely tightened.
4. Inspect the Coaxial Cable (t) for cuts in insulation or exposed shielding. Replace if damaged.
5. If still not operational, connect a Standing Wave Ratio (SWR) Power Meter and check SWR.
6. If SWR is greater than 10:1, check antenna tuner or coupler using the technical manual or manufacturer’s
procedure. Be sure to check the Coaxial Patch Cable that connects the radio set to the antenna tuner or
coupler.
7. If still not operational, replace Coaxial Cable. Most problems with antenna systems are caused by the coaxial
cables and connectors.
8. Connect a Multi-Meter to the Antenna Wire to check continuity. Replace assemblies that do not pass a
continuity check.
9. If still not operational, replace the Hybrid Micro (a).
Specifications
Frequency: (all configurations require a wide range antenna tuner or coupler)
oCHA HYBRID MICRO / MINI with 73’ wire: 1.8 MHz through 54.0 MHz continuous (including all
Amateur Radio Service bands 160m to 6m).
oCHA MIL WHIP 2.0: 1.8 –54.0 MHz (with CHA HYBRID MICRO / MINI. Limited performance below
3.5 MHz.)
oCHA MIL WHIP 2.0 with CHA MIL EXT 2.0: 1.8 –54.0 MHz (with CHA HYBRID MICRO / MINI.)
Power: CHA HYBRID MICRO / MINI: 50 W continuous duty cycle (CW, AM, FM, RTTY), 100 W intermittent
duty cycle (SSB and SSB-based digital modes)
RF Connection: UHF Plug (PL-259) or Type N Connector (special order for Government / Military, Non-
Governmental Organization (NGO), and commercial use)
Length:
oAntenna Wire: 73 ft
oCHA MIL WHIP 2.0: 9 ft 4 3/4 in extended, 17 in collapsed
oCHA MIL EXT 2.0: 8 ft 9 in extended, 28 3/4 in collapsed
oCHA MIL WHIP 2.0 with CHA MIL EXT 2.0: 18 ft 1 3/4 in extended
Weight:
oCHA HYBRID MICRO: 1 lbs
oCHA MIL WHIP: 12 oz
oCHA MIL WHIP with CHA MIL EXT: 1 lbs 12 oz
Personnel Requirements and Setup Time: one operator, less than 15 minutes (antenna wire), less than 5
minutes (whip).
MPAS 2.0 Configuration Far Field Plots are shown in figures (10) through (15).
SWR: Subject to frequency and configuration, but within limits of most wide range antenna tuners or
couplers. Figure (9) shows a graph of SWR by frequency for a typical deployment.
Warranty
The Chameleon Antenna Modular Portable Antenna System 2.0 (CHA MPAS 2.0) is warranted to be free from
defects in materials and workmanship for a period of 12 months from the date of purchase. To obtain warranty
service, return all components of the system to Chameleon AntennaTM at your expense. Chameleon AntennaTM
will repair or replace defective components and return the system to you at no charge. We encourage you to call
us for technical support before returning the antenna system. This warranty excludes components that have been
damaged or modified by the customer.