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CHA MPAS 2.0

Page 24

Figure 15. End-Fed Inverted “V” Far Field Plot 14 MHz.

Accessories

The following accessories are available for purchase from Chameleon Antenna

. Please contact us at

[email protected]

for current prices and availability.



Counterpoise Kit.

The CHA COUNTERPOISE KIT is ideal for portable antenna deployment. The system will

create the ground-plane needed to any vertical antennas and will also play the role of guy wires. It
contains four 25-foot wire radials secured around plastic wire winders and four steel tent stakes.



Capacity Hat.

The CHA CAP-HAT has been designed to enhance the radiation of any screw together HF

antenna.



50’ Paracord and Line Winder Assembly.

One assembly is recommended to enable installation of the

CHA MPAS wire configurations.



Guying System.

The Universal Guying System (CHA UGS) is recommended to stabilize the assembled CHA

MIL WHIP 2.0 and CHA MIL EXT 2.0 vertical during high winds.



Clamp Mount.

The CHA JAW MOUNT has been assembled to offer portable antenna versatility for

Chameleon Antenna owners. The mount orientation can easily be changed with a simple 3/16 Allen Key.

Recommended non-supplied accessories:



Wide range antenna tuner or coupler.

(Required for most configurations)



Paracord or similar low-stretch synthetic line.

(Required for wire antenna configurations)



Tent stake.



Plastic mallet.



Flashlight.



Multi-tool.



Throwing weight and string.

Содержание CHA MPAS 2.0

Страница 1: ...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 ...

Страница 2: ...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...

Страница 3: ...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 UG...

Страница 4: ...8MHz 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...

Страница 5: ...he 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 attache...

Страница 6: ... 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...

Страница 7: ...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 ...

Страница 8: ...nidirectional 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 bes...

Страница 9: ...e 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 Repl...

Страница 10: ...ical 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 ant...

Страница 11: ...ontal 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...

Страница 12: ...e 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 H...

Страница 13: ...to 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 atta...

Страница 14: ...ntenna 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 dama...

Страница 15: ...tion 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 ...

Страница 16: ...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...

Страница 17: ... 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 ...

Страница 18: ...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...

Страница 19: ...rting 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 se...

Страница 20: ...0 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 o Antenna Wire 73 ft o CHA MIL WHIP 2 0 9 ft 4 3 4 in extended 17 in collapsed o CHA MIL EXT 2 0 8 ft 9 in extended 28 3 4 in collapsed o CHA MIL WHIP 2 0 with CHA MIL EXT 2 0 18 ft 1 3 4 in e...

Страница 21: ...CHA MPAS 2 0 Page 21 Figure 9 SWR by Frequency Graph Figure 10 Manpack Vertical Far Field Plot 14 MHz ...

Страница 22: ...CHA MPAS 2 0 Page 22 Figure 11 Portable Vertical Far Field Plot 14 MHz Figure 12 Horizontal NVIS Far Field Plot 7 MHz ...

Страница 23: ...CHA MPAS 2 0 Page 23 Figure 13 Sloping Wire Far Field Plot 14 MHz Figure 14 Inverted L Far Field Plot 14 MHz ...

Страница 24: ...o enhance the radiation of any screw together HF antenna 50 Paracord and Line Winder Assembly One assembly is recommended to enable installation of the CHA MPAS wire configurations Guying System The Universal Guying System CHA UGS is recommended to stabilize the assembled CHA MIL WHIP 2 0 and CHA MIL EXT 2 0 vertical during high winds Clamp Mount The CHA JAW MOUNT has been assembled to offer porta...

Страница 25: ... compactness is primordial The antenna will operate at all frequencies in the 1 8 54 MHz band without any adjustment with most modern external antenna tuners No masts or guying are required CHA TD Tactical Dipole The CHA TD Tactical Dipole Antenna has been designed as an add on for the CHA HYBRID MINI MICRO The CHA TD is a HF broadband antenna specially designed for portable HF communication where...

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