{"product_id":"cha-skyloop-40","title":"CHA SKYLOOP 40","description":"\u003cdiv class=\"cha-product-content__body\" data-cha-description-standard=\"v3.1\" data-cha-product-category=\"Loop Antennas\"\u003e\n\u003ch1\u003eCHA SKYLOOP 40\u003c\/h1\u003e\n\u003ch2\u003eFull-Wave Loop Performance in a Practical 40-Meter Footprint\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eCHA SKYLOOP 40\u003c\/strong\u003e is a full-size horizontal loop antenna engineered for operators who want excellent HF performance, quiet reception, broad radiation coverage, and dependable multiband operation without the enormous installation area required by larger full-wave loops.\u003c\/p\u003e\n\u003cp\u003eConstructed from \u003cstrong\u003e141 feet of rugged 16-gauge wire\u003c\/strong\u003e, the antenna provides operation across the entire \u003cstrong\u003e40- and 20-meter amateur bands without an antenna tuner\u003c\/strong\u003e when properly installed and adjusted. When used with a suitable antenna tuner, it also supports the \u003cstrong\u003e17-, 15-, 12-, and 10-meter bands\u003c\/strong\u003e, creating a highly versatile six-band antenna system for home stations, base camps, emergency communications, and shortwave listening.\u003c\/p\u003e\n\u003cp\u003eAn integral broadband \u003cstrong\u003e2.5:1 matching transformer\u003c\/strong\u003e provides the impedance transformation required to connect the loop to a standard 50-ohm coaxial feed line. The matching unit is equipped with an \u003cstrong\u003eSO-239 connector\u003c\/strong\u003e, secure wing-nut wire terminals, an integrated support eyebolt, strain-relief hardware, and a ground connection.\u003c\/p\u003e\n\u003ch2\u003eDesigned for Real-World Installations\u003c\/h2\u003e\n\u003cp\u003eWhen installed as a square, each side of the CHA SKYLOOP 40 is approximately \u003cstrong\u003e35¼ feet long\u003c\/strong\u003e. However, a perfect square is not required. Individual sides may be made longer or shorter to accommodate available trees, masts, fence posts, building attachment points, or other safe supports, provided the total loop length remains approximately 141 feet.\u003c\/p\u003e\n\u003cp\u003eThis flexibility makes the CHA SKYLOOP 40 an excellent choice for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHome and base stations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmaller properties where a larger loop will not fit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHOA-conscious and visually discreet installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEmergency and disaster communications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBase-camp and semi-permanent field stations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRegional and long-distance HF communications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNear-Vertical Incidence Skywave communications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShortwave and general-coverage listening\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe lowest recommended optimal installation height is approximately \u003cstrong\u003e30 feet\u003c\/strong\u003e, although the antenna can still provide excellent results when installed lower. Raising the loop generally improves efficiency and supports broader regional and long-distance communication. A lower horizontal installation emphasizes the high-angle radiation useful for \u003cstrong\u003eNVIS communications\u003c\/strong\u003e, particularly on 40 meters.\u003c\/p\u003e\n\u003cp\u003eActual performance will vary with installation height, loop shape, ground conductivity, surrounding objects, terrain, feed-line routing, propagation conditions, and station configuration.\u003c\/p\u003e\n\u003ch2\u003eQuiet Reception and Broad Coverage\u003c\/h2\u003e\n\u003cp\u003eHorizontal full-wave loops are widely valued for their relatively quiet receive characteristics. Because the antenna forms a closed-loop structure, it can often receive less locally generated electrical noise than many open-ended wire antennas.\u003c\/p\u003e\n\u003cp\u003eThe CHA SKYLOOP 40 also provides a broad radiation pattern, making it useful for communicating in several directions without requiring an antenna rotator. Its radiation characteristics change with frequency and installation height, allowing the same antenna to support regional, NVIS, and longer-distance communications.\u003c\/p\u003e\n\u003ch2\u003eMultiband Operation\u003c\/h2\u003e\n\u003cp\u003eThe CHA SKYLOOP 40 is designed to operate on:\u003c\/p\u003e\n\u003ch3\u003eWithout an antenna tuner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e40 meters:\u003c\/strong\u003e 7.0–7.3 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e20 meters:\u003c\/strong\u003e 14.0–14.35 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWith a suitable antenna tuner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e17 meters:\u003c\/strong\u003e 18.068–18.168 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e15 meters:\u003c\/strong\u003e 21.0–21.45 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e12 meters:\u003c\/strong\u003e 24.89–24.99 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e10 meters:\u003c\/strong\u003e 28.0–29.0 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways verify the completed installation with an antenna analyzer or SWR meter before transmitting. Installation height, ground conditions, nearby structures, vegetation, conductive objects, and loop geometry can affect resonance and impedance.\u003c\/p\u003e\n\u003ch2\u003eThe Antenna System Consists Of:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCHA SKYLOOP 40 Matching Transformer Unit\u003c\/strong\u003e containing the integral broadband 2.5:1 matching transformer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e141-foot 16-gauge Loop Wire assembly\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLine Winder\u003c\/strong\u003e for storing and transporting the loop wire\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStainless-steel carabiners\u003c\/strong\u003e for attaching the loop-wire ends and providing strain relief\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated support eyebolt\u003c\/strong\u003e on the Matching Transformer Unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIsolation rings\u003c\/strong\u003e for electrically isolating, supporting, and forming the corners of the loop\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSpade lugs\u003c\/strong\u003e installed on the loop-wire ends for connection to the matching unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWing-nut loop-wire terminals\u003c\/strong\u003e on the Matching Transformer Unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSO-239 coaxial connector\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGround connection\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnd Insulator Strip\u003c\/strong\u003e for controlled antenna-length adjustment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExtra spade lugs and heat-shrink tubing\u003c\/strong\u003e for field tuning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOfficial CHA SKYLOOP 40 User Guide and installation instructions\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAdditional Equipment Required\u003c\/h2\u003e\n\u003cp\u003eThe following installation equipment is not part of the basic antenna system and must be selected according to the installation site:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFour safe and mechanically suitable support points\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eParacord or another appropriate nonconductive support line\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e50-ohm coaxial cable terminated with a PL-259 connector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeatherproof coaxial-connection sealant\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAntenna analyzer or SWR meter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable antenna tuner when operating on 17, 15, 12, or 10 meters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAppropriate lightning protection and station-grounding equipment for a permanent installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAvailable recommended accessories include \u003cstrong\u003eCHA COAX CABLE\u003c\/strong\u003e with an integrated RFI choke and the \u003cstrong\u003eCHA PORTA-MAST\u003c\/strong\u003e for suitable home or semi-permanent installations.\u003c\/p\u003e\n\u003ch2\u003eInstallation and Tuning\u003c\/h2\u003e\n\u003cp\u003eThe CHA SKYLOOP 40 is manufactured at a length intended to resonate near the lower CW and digital portion of the 40-meter band. Because every installation environment is different, the completed antenna should be measured before making any adjustments.\u003c\/p\u003e\n\u003cp\u003eIf the installed SWR is \u003cstrong\u003e2.0:1 or lower at both 7.000 and 7.300 MHz\u003c\/strong\u003e, no trimming is normally required.\u003c\/p\u003e\n\u003cp\u003eIf the SWR is lower at the bottom of the band and rises above 2.0:1 toward 7.300 MHz, the loop may be electrically too long for the desired operating range. The antenna can then be shortened carefully using the supplied End Insulator Strip, additional spade lugs, and heat-shrink tubing.\u003c\/p\u003e\n\u003cp\u003eAs a general field estimate, removing one foot of wire may raise resonance by approximately \u003cstrong\u003e60 kHz\u003c\/strong\u003e, but the actual change will depend on the installation. Trim only in small increments and remeasure after every adjustment. Wire that has been removed cannot easily be restored.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAntenna type:\u003c\/strong\u003e Horizontal full-wave loop\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNo-tuner frequency coverage:\u003c\/strong\u003e\u003cbr\u003e7.0–7.3 MHz and 14.0–14.35 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTuner-supported frequency coverage:\u003c\/strong\u003e\u003cbr\u003e18.068–18.168 MHz, 21.0–21.45 MHz, 24.89–24.99 MHz, and 28.0–29.0 MHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum power – SSB:\u003c\/strong\u003e 500 watts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum power – CW:\u003c\/strong\u003e 250 watts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum power – Digital modes:\u003c\/strong\u003e 100 watts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMatching transformer:\u003c\/strong\u003e Integral broadband 2.5:1 transformer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRF connection:\u003c\/strong\u003e UHF female connector, SO-239\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLoop wire:\u003c\/strong\u003e 16-gauge wire Military KEVLAR Breaded Wire PTFE\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal loop length:\u003c\/strong\u003e 141 feet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNominal square dimensions:\u003c\/strong\u003e Approximately 35¼ feet per side\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMinimum 2:1 SWR bandwidth:\u003c\/strong\u003e 350 kHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSWR:\u003c\/strong\u003e Less than 2.0:1 at resonance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLowest optimal installation height:\u003c\/strong\u003e Approximately 30 feet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2 pounds, 8 ounces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eColors:\u003c\/strong\u003e Gray, black, and green\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eA Serious HF Antenna Without an Enormous Footprint\u003c\/h2\u003e\n\u003cp\u003eThe CHA SKYLOOP 40 combines the operational benefits of a horizontal full-wave loop with a footprint that can fit many real-world properties. It provides no-tuner operation on two of the most popular HF bands, tuner-assisted access to four additional bands, substantial power-handling capability, flexible installation geometry, and strong regional, NVIS, and long-distance communication potential.\u003c\/p\u003e\n\u003cp\u003eFor operators seeking a rugged, quiet, and versatile wire antenna for home, field, emergency, or listening applications, the \u003cstrong\u003eCHA SKYLOOP 40 delivers full-size loop performance in a practical and adaptable antenna system.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Chameleon Antenna","offers":[{"title":"Default Title","offer_id":51292093546742,"sku":null,"price":225.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0695\/0024\/0118\/files\/Skyloop40QuickStart260716.jpg?v=1784574802","url":"https:\/\/chameleonantenna.com\/products\/cha-skyloop-40","provider":"Chameleon Antenna","version":"1.0","type":"link"}