This is a half wave dipole for 7 MHz (ie 10 m wire either side of the feedline) but fed with ladder feedline. In conjunction with a balanced antenna coupler like that described it Chameleon Antenna has been a pioneer at rethinking and redesigning portable antenna systems since almost a decade! Pushing the limits of design and manufacturing with cutting edge technology, Chameleon Antenna are known to design, manufacture and distribute products worldwide that are versatile, dependable and built to last! No Loss Design– Additional loss from series or shunt reactive components, however small they might be, are zero in this design. antenna coupling unit. These show that driven element length isn't very critical provided you've sorted out the impedance matching. If you make the above 1 wavelength wire asymmetrical with an off-centre support point and the part nearest the transceiver vertical

There is disagreement over how long a random wire should be. Some sources claim that certain specific lengths should be avoided due to resonance issues. But if a wire is cut to be a certain size, or to avoid a certain size, then it’s not really “random”, is it? Lots of light insulated wire. Can be thin stranded plastic covered type for temporary portable use. A 100 metre reel is good. The bandwidth capability of the Chameleon Antenna provides reliable and efficient communications. Unlike other multiband antennas, they require no changing of switches, jumpers or coils. Their simple design doesn’t require special assembly tools and they can be mounted by a single person under few minutes. A wire length of 5 metres forms a quarter wavelength on 14 MHz and a half wavelength on 28 MHz. A centre loading coil can make it tolerably good on 7 MHz. These and other bands can be covered with a wire of this length with a small antenna coupler. For further details seeI have another choke balun for higher power using RG142 coax. Following Jim’s advice once again, I used three cylindrical toroids with 3 or 4 wraps each. This yields three lower impedance chokes in series to achieve the high choke impedance goal in the upper HF range. I used this in the Field Day setup shown below with success. You may need to change the dimensions slightly. To do so start with optimising the length of the inner portion (for 14 MHz) with the clips for the other sections open. Then optimise for 10 MHz, as the support poles do not need to be as tall. A Moxon takes longer to erect than some of the simpler antennas described. You may need to use two masts. Because The next posts report results of using it at the beach for some lighthouse and IOTA work. References

A guying system for a lightweight telescopic pole (7 - 8 metres pole length recommended for Band Hopper IV) These warranties do not cover products or parts that have been subjected to misuse, neglect, accidents, improper installation, damage from severe weather conditions (including floods), exposure to corrosive substances or power surges, or any repairs or alterations performed outside of Chameleon Antenna's facilities. The warranties also do not apply to goods or parts supplied by the buyer or acquired from other sources based on the buyer's specifications. Additionally, Chameleon Antenna's warranties do not extend to other equipment and parts manufactured by third parties, except to the extent covered by the original manufacturer's warranty to Chameleon Antenna. The obligations outlined in these warranties are limited to their precise terms and serve as the exclusive remedies, replacing all other remedies, including claims for special or consequential damages. This antenna is a full quarter-wave long on 20-10 meters, and minimizes the coil necessary for 60, 40, and 30 Meters. Comet engineers have specifically designed this antenna for those that desire a milti-band dipole that can be rotated if needed, but don’t have a lot of room to install it. Do not submit a product review critiquing another review or reviewer. Reviewers should be able to share their product opinion without being publicly criticized.In my setup, I have two tripods to hold up each end plus a slotted PVC pipe to support the droop in the middle. When I can get away with it, I leave that stuff behind and just string the wire up in a tree. The AlexLoop is an embodiment of Alex’s many experimentations and experiences over the years and he has constantly added improvements on it. When it comes to staying connected in critical situations worldwide, Chameleon Antenna is the definitive game-changer. Our impressive range of reliable and versatile antennas ensures that you can maintain communication no matter where you find yourself. Our cutting-edge technology guarantees an exceptional communication experience that you can depend on.