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I head out to Dewey Marsh State Wildlife Area (POTA K-9840) with my QRP Yaesu FT-817ND to give the Chameleon OCF 40 Off Center Fed dipole antenna a test. The CHA OCF40 is a very lightweight and backpackable medium power antenna -- intended for extreme portable use, such as: Parks On the Air (POTA), Summits On the Air (SOTA), and other outdoor QRP radio adventures where an effective antenna is required.
Chameleon Off-Center Dipole is Short Wave Multiband Antenna for 40/20/10/6m bands (+WARC and 15m with Tuner only)
Bob will show you the MPAS 2.0 is really a family of antenna components that make up MANY antenna systems. He'll maximize your investment getting you the most antenna set up configurations.
What is the CHA MCH Manual?
The CHA MCH (Multi-Configuration Hub) System enables creation of multiple portable High Frequency (HF) antenna configurations when used with components from the CHA MPAS 2.0 and the CHA TDL.
The CHA MCH provides additional communications capabilities that are tailored to your operational needs!
Here we take a look at the CHA PRV POTA from Chameleon Antennas which covers from 40m up to 2m.
I made over 1000 contacts and spent a month working with the Chameleon PRV or Portable Resonant Vertical Antenna kit. The core of the PRV is the Multi Configuration Coil or MCC. This adjustable coil, when paired with an appropriate length whip, will operate on any frequency between 6 and 80 meters.
I have done a review of my use of the MPAS2 and my journey to 50,000 plus QSO's in 5.5 years, having received some questions about how I found the antenna's performance.
With my pending mini DXpedition to Niue in April 2024 as E6SP I will be using my Chameleon MPAS2 antenna, I thought it was useful to update my experience with what I have found is an exceptional antenna.
I am past 60 and was late to getting my amateur license in 2018 and became active on HF in July 2018. As I work from home, I found that the digital modes were compatible with working and non-intrusive to getting work done. My interest is propagation and digital modes are great for that and is rewarding chasing exotic signals.
I enjoy SSB voice but in terms of efficiency it was not compatible with working. When I originally got on air we were at the bottom of the solar cycle and it would have been easy to lose interest. I use Log4OM for logging, a Yaesu FT-DX10 and FT-991A as back up, JTDX and JTAlert for digital modes. Also, I dabble with FL-Digi for Olivia, RTTY etc; latterly I am enjoying VarAC. To get to 50,000 QSO’s since I started is about 20-25 QSO’s a day average.
I originally bought an MPAS1 model in 2018 and installed it semi permanently on a tripod at my QTH in Christchurch, New Zealand. My initial observations were the build quality was exceptional; I used the version with the mini balun versus the micro for the power handling of 100 watts on digital modes above 40m. Below 40m while the radio ATU will tune to 1:1 SWR the balun will overheat and reach its curie temperature and SWR would rise when running over 50-60 watts. On the occasion this occurred the balun would always return to normal state without issue.
The configuration I used was the MPAS2 on a tripod with the 3 supports anchored with metal tent pegs and 5 of the standard Chameleon radials in a star configuration layout. The radials were elevated and the balun/antenna were affixed to the tripod with the Chameleon jaw mount. I also used the Chameleon RF choke. I replaced the MPAS1 with the MPAS2 in September 2019 using the same radials, coax cable, choke etc and taking the CAPHAT from the MPAS1 to the MPAS2.
In 2020 I moved locations in Christchurch to basically the inner city of Christchurch at noise central. The current configuration as shown in the photo has the MPAS2 elevated on a 3 meter aluminum pole with the same radial pattern as per the original QTH.
The MPAS2 has been in place at the latest QTH since June 2020. I have only taken it down once when the coupling nut between the balun and antenna slowly stripped the thread over time with wind movement stress. This was about 12 months after installation and can be attributed to having not tightened it sufficiently in the first place. While intended as a portable antenna and not for permanent installation it has fared exceptionally well in the Christchurch climate with temperature extremes of -10C to 36C annually and wind gusts of 120kph not being uncommon. As per the information PDF’s available from Chameleon I used Noalox on the antenna segments and additionally a 3M transparent UV resistant electrical tape on the joints.
I anticipate when I dismantle it this week in preparation for the Niue trip all will be OK!
Given the limitations of my urban locations and the high noise floor I find the Chameleon very quiet. At both QTH’s I tried an EFHW, two different models from a reputable supplier and was puzzled that the EFHW’s were so much noisier than the Chameleon. In the last test 40m was unusable on the EFHW despite trying different configurations because of noise, but there was no noise on the MPAS2. On each A/B test I did between the EFHW and MPAS2 signals were better on the MPAS2, and monitoring my signal on remote SDR’s invariably the MPAS2 was better. The MPAS2 works well for NVIS on 160m and 80m. These are bands that I have not focussed on.
Below is an SWR plot of the MPAS2 with a RigExpert 600, this is consistent with the resources available from Chameleon online. Interestingly, despite the expected high SWR on 160m and 80m the internal tuner on both the FT-DX10 and FT-991A will tune up to 1:1 so was usable.
Below are slots worked and those confirmed on LoTW by DXCC in Club log which proves the MPAS2 capabilities using a maximum of 100 watts from the bottom of the world, I actively chase new DXCC entities by band slots and it is a fun challenge.
On SSB I have worked European stations where we have started at 100 watts and reduced power to 5 watts and still been copiable. Bouvet was confirmed on 17m FT8. With WAS 40m, 30m, 20m, 17m, 12m, & 10m are confirmed in LoTW.
My dear friend Bill ZL3NB who was previously WA3GLX, recently a SK, referred to my MPAS2 as the “stick.” Bill was ex-US Navy and had lived in Christchurch for many years and was on the ARRL honor roll. With his 3 element beam he was often surprised at what I was hearing, or working on the stick.
All going well I will update this review after my Niue E6SP adventure in April.
Gavin ZL3GAV/E6SP
31 March 2024. rev 1.0
https://cybersecuritysolutions.co.nz/mpas2
Chameleon MPAS2 on 31 March 2024 cloudy autumn morning in Christchurch
Chameleon MPAS2 Rig Expert AA600 SWR sweep
ZL3GAV - Clublog Band slots worked at 31 March 2024
ZL3GAV - Clublog Band slots LoTW confirmed at 31 March 2024
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The Chameleon Antennas are made with the finest material available. They can be used for multiple purposes such as Mobile, Portable, Base station, Marine, EMCOMM, MARS/CAP, ARES, SATERN, RACES, First Responders, Emergency Preparedness, Skywarn, Military & Government communications and much more.
Mostly undetectable the Chameleon Antennas are very effective antennas for deed restricted lots and for quick deployment communication systems. Built to last they’ll survive very harsh conditions where other antennas fail.
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.
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!
Established in 2008, Chameleon Antenna has been a great source of enjoyment for amateur radio operators. Their antenna designs have inspired other companies to also rethink their own antenna systems.
Chameleon Antenna is proudly manufacturing antennas that are 100% made in the USA.
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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.
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At Chameleon Antenna, we take immense pride in our commitment to excellence. Our team of experts tirelessly works to create antennas that stand out in the market for their exceptional technology, unmatched performance, and remarkable durability. We carefully select top-quality materials based on strength, weight, and conductivity to ensure that our products can withstand the most challenging conditions, making them highly reliable for the long term.
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With our antennas, user convenience takes center stage. You don't need to be a tech expert to set them up or operate them. Our antennas are incredibly easy to use, and you'll be up and running in no time, regardless of your technical expertise. Their lightweight and portable design makes them ideal for emergencies or trips. Our user guidelines offer simple, easy-to-follow instructions, enabling you to start using your new antenna without any hassle. Choosing Chameleon Antenna means opting for a product that prioritizes your ease and convenience.
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One of the key features of our high-quality antennas is their modular and customizable design. We understand that each user has unique communication requirements, and our antennas are engineered to adapt to those needs. Our state-of-the-art technology and materials guarantee reliable and consistent performance, even in the most demanding environments. Furthermore, our antennas are compatible with all types of radios, making them a versatile option for professionals, hobbyists, and everyone in between.
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When you demand nothing but the best in quality, versatility, and performance, Chameleon Antenna is your clear choice. Our antennas surpass all others, ensuring seamless communication with those who matter most to you. With exceptional durability and adaptability, our antennas provide crystal-clear communication in even the harshest and most remote locations. Count on Chameleon Antenna for reliable communication solutions that truly make a difference.
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In times of emergency, a reliable communication system can make all the difference. Whether you're an avid hiker or reside in the city, being prepared is essential. Don't wait for a crisis to strike. Secure your Chameleon Antenna now and experience its unparalleled performance and ease of use. Stay connected with the world in any challenging situation, and be ready for whatever comes your way.
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We now have FOUR different Winder and counterpoise colors for your POTA and SOTA expedition!
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CHA WIRE WHEEL WINDERS w/ HANDLE (2 pack)
$20.00
Our BLF-1212AS KIT (10 hours on HF SSB at 20% TX and 80% RX) are BACK IN STOCK! $99.00 (34% OFF)
All our products such as magnetic loop antenna, portable antenna and wire antenna, are proudly made in the United-States.
Our products are carefully engineered & CNC manufactured by qualified engineers.
Due to our exceptional craftsmanship skills, our products are standing out from the competition.
Our HF antennas are tested at a height of 25 ft. in “clear surroundings”, in an inverted V and/or sloper configurations. If your installation site does not meet these requirements, the tuning will yield high SWR and impaired performance. In any case, a good wide range tuner is recommended to lower SWR and broadband the SWR bandwidth for any model. We cannot answer questions about “if we think” non-standard installations would work because there is simply no way to know. Some work and some don’t.
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