{"product_id":"atu-100-auto-antenna-tuner-100w-n7ddc-diy-radio-tuner","title":"ATU-100 Auto Antenna Tuner 100W – N7DDC DIY Radio Tuner","description":"\n\u003ch2\u003eATU-100 Automatic Antenna Tuner 100W by N7DDC\u003c\/h2\u003e\n\u003cp\u003eTake your amateur radio setup to the next level with the \u003cstrong\u003eATU-100 Automatic Antenna Tuner\u003c\/strong\u003e, a high-performance DIY tuner based on the renowned N7DDC design. Whether you're a seasoned ham radio operator or an enthusiastic builder, this 100W auto tuner delivers precise impedance matching across a wide range of frequencies — helping you get the most out of every transmission.\u003c\/p\u003e\n\n\u003cp\u003eBuilt to handle up to \u003cstrong\u003e100W of working power\u003c\/strong\u003e and capable of measuring up to 150W, the ATU-100 features intelligent automatic tuning that kicks in with as little as 5W of input power. Its broad inductance and capacitance range ensures compatibility with a wide variety of antenna types, making it an incredibly versatile addition to your shack. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Tuning:\u003c\/strong\u003e Starts tuning automatically with just 5W of input power\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100W Working Power:\u003c\/strong\u003e Handles up to 100W continuously, with up to 150W peak measurement capability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Supply Voltage:\u003c\/strong\u003e Operates on 10–15VDC for flexible power options\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Power Measurement:\u003c\/strong\u003e 0.1W resolution below 10W, 1W resolution above — with ±10% accuracy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Inductance Range:\u003c\/strong\u003e Up to 8.53µH maximum installed inductance, with a 0.05µH minimum step\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Capacitance Range:\u003c\/strong\u003e Up to 1,869 pF maximum installed capacitance, 10 pF minimum step\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Typical draw of only 100–200 mA (max 400 mA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eN7DDC Design:\u003c\/strong\u003e Based on the trusted, community-proven N7DDC open-source schematic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIY-Friendly:\u003c\/strong\u003e Perfect for builders and hobbyists looking to customize their radio setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10–15 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Current Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Working Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Measurement Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Power to Start Tuning\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Measurable Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Resolution (≤10W)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Resolution (\u0026gt;10W)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Measurement Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Inductance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.53 µH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Inductance Step\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.05 µH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Capacitance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1,869 pF\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Capacitance Step\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 pF\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100–200 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLS0600\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × ATU-100 Radio Antenna Tuner (plug not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: This product is regularly upgraded. Appearance and color may vary from images shown. Please consider this before placing your order if specific color or appearance is required.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eExplore More from Our Store\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and accessories for your projects? Check out our \u003ca href=\"\/products\/leather-hole-punch-tool-diy-stitching-punch-4-5-6mm\"\u003eLeather Hole Punch Tool | DIY Stitching Punch 4\/5\/6mm\u003c\/a\u003e and our \u003ca href=\"\/products\/airtight-transparent-pet-storage-bottle-craft-beads-home-organization\"\u003eAirtight Transparent PET Storage Bottle\u003c\/a\u003e — perfect for organizing small components and accessories in your workspace.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the minimum power needed to activate the ATU-100 automatic antenna tuner?\u003c\/h4\u003e\n\u003cp\u003eA: The ATU-100 automatic antenna tuner requires a minimum of \u003cstrong\u003e5W\u003c\/strong\u003e of input power to initiate the automatic tuning sequence. This makes it compatible with a wide range of transceivers, including low-power QRP rigs running at 5W or more.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the ATU-100 antenna tuner compatible with all antenna types?\u003c\/h4\u003e\n\u003cp\u003eA: The ATU-100 is designed to match a broad variety of antenna configurations thanks to its wide inductance range (up to 8.53 µH) and capacitance range (up to 1,869 pF). It works well with wire antennas, verticals, and other common amateur radio antenna types, provided the impedance mismatch falls within its tuning range.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the ATU-100 come fully assembled or as a kit?\u003c\/h4\u003e\n\u003cp\u003eA: The ATU-100 is supplied as a single assembled unit (1 piece). It is based on the popular N7DDC open-source design and is popular among DIY ham radio enthusiasts. Please note that a power plug is \u003cstrong\u003enot included\u003c\/strong\u003e in the package.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage does the ATU-100 antenna tuner require?\u003c\/h4\u003e\n\u003cp\u003eA: The ATU-100 operates on a DC supply voltage in the range of \u003cstrong\u003e10–15 VDC\u003c\/strong\u003e, with a maximum current draw of 400 mA. Typical operation draws only 100–200 mA, making it energy-efficient for continuous use in your radio shack.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the minimum power needed to activate the ATU-100 automatic antenna tuner?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ATU-100 automatic antenna tuner requires a minimum of 5W of input power to initiate the automatic tuning sequence. 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