{"product_id":"cha-enclo","title":"CHA ENCLO - DIY Antenna Transformer Enclosure Kit","description":"\u003cdiv class=\"cha-product-content cha-flagship cha-enclo\" data-cha-product-standard=\"flagship-v1\"\u003e\u003cdiv class=\"cha-product-content__body\"\u003e\n\u003cp class=\"cha-product-content__subtitle\"\u003eCustom ABS enclosure, winder and hardware for antenna builders\u003c\/p\u003e\n\u003csection class=\"cha-product-introduction cha-flagship__hero\"\u003e\u003cp class=\"cha-product-introduction__eyebrow\"\u003eYour transformer. Our custom enclosure.\u003c\/p\u003e\n\u003ch2\u003eBuild your next balun or unun in the box behind the CHA B3D.\u003c\/h2\u003e\n\u003cdiv class=\"cha-product-introduction__copy\"\u003e\n\u003cp\u003eSpend your bench time building the transformer, with a compact enclosure and the connection hardware already selected. The CHA ENCLO gives antenna builders Chameleon Antenna’s own custom ABS enclosure, an SO-239 coaxial connector, a gasket and stainless steel mounting hardware—a practical starting point for your next balun or unun.\u003c\/p\u003e\n\u003cp\u003eThis is the same enclosure used in the CHA B3D Broadband Base Dipole. Build the matching network that suits your antenna, whether you are experimenting at the bench, preparing a portable wire antenna or assembling several projects for a club workshop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"cha-flagship__facts\" aria-label=\"CHA ENCLO at a glance\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom ABS body\u003c\/strong\u003e\u003cspan\u003eSame enclosure as the CHA B3D\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFT240-size builds\u003c\/strong\u003e\u003cspan\u003eIntentionally snug fit\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSO-239 included\u003c\/strong\u003e\u003cspan\u003eWith stainless fasteners\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo field colors\u003c\/strong\u003e\u003cspan\u003eTan and OD Green\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\u003csection class=\"cha-flagship__section cha-flagship__installation\" aria-labelledby=\"enclo-dimensions\"\u003e\u003cdiv\u003e\n\u003cp class=\"cha-flagship__eyebrow\"\u003ePlan the fit before you wind\u003c\/p\u003e\n\u003ch2 id=\"enclo-dimensions\"\u003eSee how your build will fit\u003c\/h2\u003e\n\u003cp\u003eCheck the body, opening, cavity depth and extended lid\/winder dimensions before planning your connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"enclo-drawing\"\u003e\u003ca href=\"https:\/\/chameleonantenna.com\/cdn\/shop\/t\/483\/assets\/cha-enclo-dimensions-rb.svg?v=45433325451372326511794263308\" target=\"_blank\" rel=\"noopener\" aria-label=\"Open CHA ENCLO dimension drawing at full size\"\u003e\u003cimg src=\"https:\/\/chameleonantenna.com\/cdn\/shop\/t\/483\/assets\/cha-enclo-dimensions-rb.svg?v=45433325451372326511794263308\" alt=\"CHA ENCLO dimension drawing showing body 3-1\/2 by 2-3\/4 by 1-3\/4 inches, opening 3-1\/4 by 2-1\/2 inches, depth 1-3\/8 inches, and extended lid\/winder 8 by 4 inches\" width=\"1600\" height=\"1000\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eNominal dimensions in inches with rounded millimeter equivalents. Tap the drawing to enlarge.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003c\/section\u003e\n\u003csection class=\"cha-flagship__section\"\u003e\u003cp class=\"cha-flagship__eyebrow\"\u003eChoose your circuit\u003c\/p\u003e\n\u003ch2\u003eOne enclosure. Several transformer projects.\u003c\/h2\u003e\n\u003cp class=\"cha-flagship__lead\"\u003eYou supply the core, winding wire and circuit components. Potential projects include:\u003c\/p\u003e\n\u003cdiv class=\"cha-flagship__cards\"\u003e\n\u003carticle\u003e\u003ch3\u003e49:1 or 64:1 EFHW matching transformers\u003c\/h3\u003e\n\u003cp\u003efor appropriately designed end-fed half-wave antennas. Select the ratio, winding and compensation components for the intended antenna and bands.\u003c\/p\u003e\u003c\/article\u003e\u003carticle\u003e\u003ch3\u003e9:1 ununs\u003c\/h3\u003e\n\u003cp\u003efor suitable nonresonant end-fed wire systems, normally used with a tuner and an appropriate counterpoise or return path.\u003c\/p\u003e\u003c\/article\u003e\u003carticle\u003e\u003ch3\u003e4:1 impedance transformers\u003c\/h3\u003e\n\u003cp\u003efor selected loop, off-center-fed dipole or other matching applications. Choose a balun or unun circuit to suit the load; a 4:1 impedance ratio does not itself provide common-mode isolation.\u003c\/p\u003e\u003c\/article\u003e\u003carticle\u003e\u003ch3\u003e1:1 current baluns\u003c\/h3\u003e\n\u003cp\u003efor suitable coax-to-balanced-antenna feed points. A coax-to-coax line isolator requires a second coaxial connector and any necessary enclosure modification; only one SO-239 is supplied.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cp class=\"cha-flagship__note\"\u003eThese are project ideas, not complete circuit kits or a guarantee that every published design fits. Check winding dimensions, insulation clearance and electrical performance.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection class=\"cha-key-specifications cha-flagship__specs\"\u003e\u003cp class=\"cha-key-specifications__eyebrow\"\u003eComplete product reference\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cdl class=\"cha-key-specifications__grid\"\u003e\n\u003cdiv\u003e\n\u003cdt\u003eBody outside\u003c\/dt\u003e\n\u003cdd\u003e3-1\/2 × 2-3\/4 × 1-3\/4 in (89 × 70 × 44 mm)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eInternal opening\u003c\/dt\u003e\n\u003cdd\u003e3-1\/4 × 2-1\/2 in (83 × 64 mm)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eCavity depth\u003c\/dt\u003e\n\u003cdd\u003e1-3\/8 in (35 mm), rim to floor\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eExtended lid \/ winder\u003c\/dt\u003e\n\u003cdd\u003e8 × 4 in (203 × 102 mm)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eABS (acrylonitrile butadiene styrene)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eColors\u003c\/dt\u003e\n\u003cdd\u003eTan and OD Green\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRF connection\u003c\/dt\u003e\n\u003cdd\u003eOne SO-239 female connector\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eHardware\u003c\/dt\u003e\n\u003cdd\u003eStainless steel fasteners and eyebolt\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLid seal\u003c\/dt\u003e\n\u003cdd\u003eGasketed lid\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\n\u003cp\u003eDimensions are nominal, with rounded metric equivalents. Chamfered corners, wall taper and installed hardware reduce usable clearance.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection class=\"cha-flagship__section\"\u003e\u003cp class=\"cha-flagship__eyebrow\"\u003eKnow what arrives\u003c\/p\u003e\n\u003ch2\u003eIncluded and customer-supplied equipment\u003c\/h2\u003e\n\u003cp\u003eQuantities below are for one enclosure kit. Every kit in your selected pack receives the same listed hardware.\u003c\/p\u003e\n\u003cdiv class=\"cha-flagship__contents\"\u003e\n\u003carticle\u003e\u003ch3\u003eIncluded with each kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 ABS enclosure body and extended lid\/winder, pack color\u003c\/li\u003e\n\u003cli\u003e1 gasket\u003c\/li\u003e\n\u003cli\u003e1 SO-239 connector\u003c\/li\u003e\n\u003cli\u003e1 × 2-inch eyebolt\u003c\/li\u003e\n\u003cli\u003e2 × #10-24 × 5\/8-inch socket cap screws\u003c\/li\u003e\n\u003cli\u003e4 × #10-24 KL nuts\u003c\/li\u003e\n\u003cli\u003e2 × #10 lock washers\u003c\/li\u003e\n\u003cli\u003e2 × #10-24 wing nuts\u003c\/li\u003e\n\u003cli\u003e2 × #6-32 × 1\/2-inch button screws\u003c\/li\u003e\n\u003cli\u003e2 × #6-32 KL nuts\u003c\/li\u003e\n\u003cli\u003e4 × #4-40 × 1\/2-inch Phillips screws\u003c\/li\u003e\n\u003cli\u003e4 × #4-40 KL nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/article\u003e\u003carticle\u003e\u003ch3\u003eWhat you supply\u003c\/h3\u003e\n\u003cp\u003eFerrite core, winding wire, circuit components, antenna wire, feed line, tools, solder and any additional mounting or sealing materials required by your design. No wound transformer or completed antenna is included.\u003c\/p\u003e\n\u003ch3\u003eChoose your pack\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 2 - two colors:\u003c\/strong\u003e one Tan enclosure kit and one OD Green enclosure kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 5 - Tan:\u003c\/strong\u003e five Tan enclosure kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 5 - OD Green:\u003c\/strong\u003e five OD Green enclosure kits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/article\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003caside class=\"cha-docs-panel\" aria-label=\"CHA ENCLO dimension drawing\"\u003e\u003cdiv class=\"cha-docs-panel__content\"\u003e\n\u003cp class=\"cha-docs-panel__eyebrow\"\u003eTechnical drawing\u003c\/p\u003e\n\u003ch2\u003eKeep the dimensions on your bench\u003c\/h2\u003e\n\u003cp\u003eDownload the nominal fit-planning drawing for your project. Hole locations and manufacturing tolerances are not specified.\u003c\/p\u003e\n\u003ca class=\"cha-docs-panel__button\" href=\"https:\/\/chameleonantenna.com\/cdn\/shop\/t\/483\/assets\/cha-enclo-dimensions-rb.pdf?v=151330530230742666161794263308\" target=\"_blank\" rel=\"noopener\"\u003eDownload dimension drawing (PDF)\u003c\/a\u003e\u003ca class=\"cha-docs-panel__secondary\" href=\"https:\/\/chameleonantenna.com\/cdn\/shop\/t\/483\/assets\/cha-enclo-dimensions-rb.svg?v=45433325451372326511794263308\" target=\"_blank\" rel=\"noopener\"\u003eOpen full-size drawing\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/aside\u003e\n\u003csection class=\"cha-flagship__section\"\u003e\u003cp class=\"cha-flagship__eyebrow\"\u003eCompact by design\u003c\/p\u003e\n\u003ch2\u003eA snug fit for FT240 projects\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe enclosure was intentionally designed for a tight fit around an FT240-size transformer, including a transformer built with an FT240-43 core.\u003c\/strong\u003e Plan the winding layout and trial-fit the completed winding before final assembly. Wire diameter, insulation, winding placement and terminal clearance all affect the finished fit. The lid must close without pinching insulation or forcing the core into place.\u003c\/p\u003e\n\u003cp\u003eOther ferrite mixes can be used when the finished transformer fits the same available space. Choose the mix for the electrical design and intended frequency range; a matching core size alone does not establish suitable RF performance. Stacked cores and oversized windings require a separate fit check.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"cha-flagship__section\"\u003e\u003cp class=\"cha-flagship__eyebrow\"\u003eBuild with care\u003c\/p\u003e\n\u003ch2\u003eBuild and test before transmitting\u003c\/h2\u003e\n\u003cp\u003eThe finished transformer’s frequency range and power capability depend on its circuit, core material, winding, insulation, load and duty cycle. The enclosure does not establish a power rating. Start testing at low power and check matching, heating and insulation clearance before increasing power. Provide strain relief for antenna and feed-line loads. Keep antenna installations clear of power lines.\u003c\/p\u003e\n\u003cp\u003eSeat the gasket evenly and address every connector and hardware penetration when preparing an outdoor installation. A gasket alone does not establish an IP rating or make the completed assembly submersible.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n","brand":"Chameleon Antenna","offers":[{"title":"Pack of 2 - Tan + OD Green","offer_id":52349650960630,"sku":"CHA-ENCLO-2-MIX","price":40.0,"currency_code":"USD","in_stock":true},{"title":"Pack of 5 - Tan","offer_id":52349650993398,"sku":"CHA-ENCLO-5-TAN","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Pack of 5 - OD Green","offer_id":52349651026166,"sku":"CHA-ENCLO-5-OD","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0695\/0024\/0118\/files\/cha-enclo-tan.jpg?v=1794268861","url":"https:\/\/chameleonantenna.com\/products\/cha-enclo","provider":"Chameleon Antenna","version":"1.0","type":"link"}