{"product_id":"active-magnetic-loop-antenna-100khz-30mhz-sdr-hf-radio","title":"Active Magnetic Loop Antenna 100kHz–30MHz | SDR \u0026 HF Radio","description":"\u003ch2\u003e100kHz–30MHz Active Magnetic Loop Antenna – Low Noise, Adjustable Gain for SDR \u0026amp; HF Radio\u003c\/h2\u003e\n\n\u003cp\u003eTake your shortwave, medium wave, and HF radio listening to the next level with this \u003cstrong\u003eActive Magnetic Loop Antenna\u003c\/strong\u003e covering an impressive \u003cstrong\u003e100kHz to 30MHz\u003c\/strong\u003e frequency range. Engineered for Software Defined Radio (SDR) enthusiasts and shortwave hobbyists alike, this antenna delivers \u003cstrong\u003elow-noise reception with adjustable gain\u003c\/strong\u003e, making it ideal for pulling in weak or distant signals across the full HF spectrum.\u003c\/p\u003e\n\n\u003cp\u003eThis product ships as a \u003cstrong\u003eDIY kit\u003c\/strong\u003e — including a main circuit board and all required electronic components — so you can enjoy the satisfaction of building and tuning your own antenna system. The board features \u003cstrong\u003ebuilt-in reverse polarity protection\u003c\/strong\u003e, so an accidental power connection mishap won't damage the main chip. Please note: components must only be soldered to the designated side of the board to avoid damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Frequency Coverage:\u003c\/strong\u003e 100kHz to 30MHz — covering LW, MW, and all HF shortwave bands\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActive Design with Adjustable Gain:\u003c\/strong\u003e Amplify incoming signals and fine-tune sensitivity for your listening environment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Noise Circuit:\u003c\/strong\u003e Optimized PCB design minimizes interference for cleaner, clearer signal reception\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Connection Protection:\u003c\/strong\u003e Built-in safeguard prevents chip burnout from accidental reverse polarity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Power Input:\u003c\/strong\u003e Supports 9V battery (via battery snap) or external power supply (via terminal block)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSDR Compatible:\u003c\/strong\u003e Works seamlessly with popular SDR receivers and traditional shortwave radios\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIY Kit Format:\u003c\/strong\u003e Includes main board and all electronic components — a rewarding build for hobbyists\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 100kHz – 30MHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAntenna Type:\u003c\/strong\u003e Active Magnetic Loop\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e Adjustable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 9V battery (snap connector) or external DC (terminal block)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolarity Protection:\u003c\/strong\u003e Yes (reverse connection protected)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e① Main Circuit Board\u003c\/li\u003e\n  \u003cli\u003e② Electronic Components (for DIY assembly)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eWiring Caution:\u003c\/strong\u003e The rear \u003cstrong\u003ered wire port is positive (+)\u003c\/strong\u003e and the \u003cstrong\u003eblack wire port is negative (−)\u003c\/strong\u003e. Always verify correct polarity before powering on. Components must be soldered to the correct (front) side of the board — soldering to the back will damage the chip.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What frequency range does this active loop antenna cover?\u003c\/h4\u003e\n\u003cp\u003eA: This active magnetic loop antenna covers \u003cstrong\u003e100kHz to 30MHz\u003c\/strong\u003e, spanning long wave (LW), medium wave (MW), and the full shortwave\/HF spectrum — making it versatile for SDR receivers, AM radio, and HF listening.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this antenna compatible with SDR (Software Defined Radio) receivers?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This antenna is specifically designed for use with popular SDR receivers as well as traditional shortwave and medium wave radios. Its adjustable gain and low-noise circuit make it an excellent front-end antenna for SDR setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What power supply does this antenna require?\u003c\/h4\u003e\n\u003cp\u003eA: The antenna supports a \u003cstrong\u003e9V battery\u003c\/strong\u003e using the included battery snap connector. Alternatively, you can connect an external DC power supply via the terminal block on the board. Always double-check polarity (red = positive, black = negative) before powering on.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this come fully assembled or as a kit?\u003c\/h4\u003e\n\u003cp\u003eA: This product is supplied as a \u003cstrong\u003eDIY kit\u003c\/strong\u003e, including the main circuit board and all necessary electronic components. You will need to solder the components onto the board. It is suitable for hobbyists with basic electronics soldering experience.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What frequency range does this active loop antenna cover?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This active magnetic loop antenna covers 100kHz to 30MHz, spanning long wave (LW), medium wave (MW), and the full shortwave\/HF spectrum — making it versatile for SDR receivers, AM radio, and HF listening.\"}}, {\"@type\": \"Question\", \"name\": \"Is this antenna compatible with SDR (Software Defined Radio) receivers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This antenna is specifically designed for use with popular SDR receivers as well as traditional shortwave and medium wave radios. 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