Chameleon Antenna CHA EMCOMM II V2 Operator'S Manual Download Page 16

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CHA EMCOMM II V2

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Summary of Contents for CHA EMCOMM II V2

Page 1: ...Revised November 7 2020 Portable HF Antenna CHA EMCOMM II V2 Operator s Manual Nevada USA WWW CHAMELEONANTENNA COM VERSATILE DEPENDABLE STEALTH BUILT TO LAST ...

Page 2: ...f overhead power lines when you are deploying the CHA EMCOMM II V2 You could be electrocuted if the antenna gets near or contacts overhead power lines Photographs and diagrams in this manual may vary slightly from current production units due to manufacturing changes that do not affect the form fit or function of the product All information on this product and the product itself is the property of...

Page 3: ...ase read this operator s manual so that you may maximize the utility you obtain from your CHA EMCOMM II V2 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...

Page 4: ... 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 listenin...

Page 5: ...II V2 b Antenna Wire The Antenna Wire see plate 2 is a 60 foot length of insulated wire c Isolation loop Isolation loops circular insulators are permanently attached to the ends and middle free floating of the Antenna Wire b d Carabiner The Carabiner is a removable pear shaped stainless steel hook with a spring loaded gate e Wire Connector The Wire Connector is located at the end of the Antenna Wi...

Page 6: ... on the bottom of the Matching Transformer a h Top Transformer Connection The Top Transformer Connection marked A on the case is located on the top of the Matching Transformer a i Bottom Transformer Connection The Bottom Transformer Connection is located on the bottom of the Matching Transformer a j Transformer Eyebolt The Transformer Eyebolt is located on the top of the Matching Transformer a ...

Page 7: ...ce column All CHA EMCOMM II V2 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 directionality characteristic of the antenna configuration When using NVIS all the configurations are omnidirectional Most configuration and frequ...

Page 8: ...ct 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...

Page 9: ...figuration Site Selection and Preparation 1 Select a site to deploy the CHA EMCOMM II V2 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 2 If not a...

Page 10: ... 12 If using a counterpoise wire extend it along the ground in any convenient direction away from the Antenna Wire 13 Perform operational test Inverted L The CHA EMCOMM II V2 Inverted L configuration see figure 5 is a broadband short to medium range HF antenna This configuration tends to be unidirectional favoring the horizontal end of the antenna It also provides effective ground waves communicat...

Page 11: ...ke into the ground closest to the location of the radio set and tie the Paracord from the Matching Transformer to the Stake using two Half Hitches or similar knot 9 Using a Bowline or similar knot tie a long length 50 feet or more of Paracord to the Isolation Loop c at the end of the Antenna Wire 10 Using a throw weight or some other method loop the Paracord over the support closest to the radio s...

Page 12: ...that connects the radio set to the antenna tuner or coupler 7 If still not operational replace Coaxial Cable assembly 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 Matching Transformer Specifications Frequency...

Page 13: ... contains four 25 foot wire radials secured around plastic wire winders and four steel tent stakes 50 Paracord and Line Winder Assembly One assembly is recommended to enable installation of the CHA EMCOMM II V2 Coaxial Cable Assembly 50 feet of RG 58 with integrated RFI Choke Used to connect the CHA EMCOMM II V2 to the radio set This is a highly recommended accessory if you are not using a CHA RFI...

Page 14: ...CHA EMCOMM II V2 Page 14 Figure 8 Inverted L Far Field Plots 3 7 left and 7 right MHz Figure 9 Horizontal NVIS Far Field Plots 3 7 left and 7 right MHz ...

Page 15: ...oise if not purchasing optional counterpoise kit 10x24 stainless steel wing nut Recommend one for use as a spare Small canvas or nylon bag to store antenna components References 1 Silver H Ward editor 2013 2014 ARRL Handbook for Radio Communications 91st Edition American Radio Relay League Newington CT 2 1987 Tactical Single Channel Radio Communications Techniques FM 24 18 Department of the Army W...

Page 16: ...tion about quality antenna products available for purchase from Chameleon AntennaTM The Portable Antenna Pioneer Chameleon AntennaTM products are available from these great dealers HRO DX ENGINEERING GIGAPARTS WIMO MOONRAKER RADIOWORLD UK R L ELECTRONICS ML S MARTIN LYNCH PILEUPDX LUTZ ELECTRONICS RADIOWORLD CANADA GPS CENTRAL PASSION RADIO COM ...

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