{"product_id":"icom-ah740","title":"Icom AH740 Compact Automatic Tuning HF Antenna (2.5-30MHz)","description":"\u003ch2\u003eCompact Automatic Tuning HF Antenna\u003c\/h2\u003e\n\u003ch3\u003eHigh-speed relay-driven automatic antenna tuner for Icom HF base and mobile transceivers.\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eIcom AH740\u003c\/b\u003e is a compact, relay-driven automatic tuning HF antenna designed for seamless broad-band high-frequency operation from 2.5 MHz to 30 MHz (expandable down to 2.2 MHz with an optional NVIS kit). Built for vehicular, maritime, and fixed-station HF communication setups, the \u003cb\u003eIcom AH740\u003c\/b\u003e automatically matches the transceiver output impedance to 50 Ω across HF bands within seconds, ensuring maximum power transfer and signal clarity.\u003c\/p\u003e\n\u003cp\u003eConstructed with a heavy-duty weather-sealed tuner base, a stainless steel whip antenna, and a durable shock-absorbing spring mount, the \u003cb\u003eIcom AH740\u003c\/b\u003e is built to withstand high winds, severe vibration, and harsh environmental conditions. Its low-power relay switching mechanism provides rapid tuning speeds and stable impedance matching for emergency response, government, defense, and long-range HF amateur operations.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWideband HF Tuning Range\u003c\/b\u003e: Covers 2.5–30 MHz with the included whip element and extends down to 2.2–30 MHz when paired with an NVIS kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRapid Relay-Driven Automatic Tuning\u003c\/b\u003e: Fast relay switching matches 50 Ω input impedance in seconds for instant frequency changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRugged Heavy-Duty Spring Mount\u003c\/b\u003e: Flexible spring connector protects the whip element and tuner base from branch impacts and road vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandard SO-239 Antenna Interface\u003c\/b\u003e: Integrates easily with standard coaxial feedlines and Icom HF transceiver control cables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory OEM Quality\u003c\/b\u003e: Genuine Icom engineering ensures full compatibility and automatic control via supported Icom HF transceivers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIcom\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\/SKU\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAH740\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAutomatic Tuning HF Antenna\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFrequency Coverage (Standard)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.5–30 MHz (with supplied whip)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFrequency Coverage (NVIS Kit)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.2–30 MHz (with optional NVIS kit)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Impedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAntenna Connector\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSO-239\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApprox. 3.5 kg (7.7 lbs)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBase Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e238 mm (H) x 145 mm (W) x 160 mm (D)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWhip Length\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1540 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSpring Length\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e131 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eIcom HF Transceivers\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e7100\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e718\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7300\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7300MK2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e7610\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eF8101\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\/Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eStatus\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIcom Automatic Tuning Base Unit\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAH740\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e1540mm Whip Antenna Element\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e—\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e131mm Heavy-Duty Spring Mount\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e—\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRecommended Accessories\u003cb\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eHF Transceivers\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003ca href=\"\/products\/icom-f8101-33\"\u003eIcom IC-F8101 HF Land Mobile Radio\u003c\/a\u003e\u003c\/b\u003e – Commercial\/government 125W HF transceiver featuring automatic link establishment (ALE).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMore Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003e\u003ca href=\"\/blogs\/news\/how-icom-radios-serve-maritime-and-coastal-operations\"\u003eHow Icom Radios Serve Maritime and Coastal Operations\u003c\/a\u003e\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e\u003ca href=\"\/blogs\/news\/programming-icom-radios-for-multi-shift-operations\"\u003eProgramming Icom Radios for Multi-Shift Operations\u003c\/a\u003e\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e\u003ca href=\"\/blogs\/news\/common-applications-for-icom-radios-outside-of-business\"\u003eCommon Applications for Icom Radios Outside of Business\u003c\/a\u003e\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e\u003ca href=\"\/blogs\/hytera-2-way-radios\/15-myth-busting-facts-about-two-way-radio-range\"\u003e15 Myth-Busting Facts About Two-Way Radio Range\u003c\/a\u003e\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e\u003ca href=\"\/collections\/icom\"\u003eBrowse All Icom Two-Way Radio Antennas\u003c\/a\u003e\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is the primary function of the Icom AH740 antenna?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eIcom AH740\u003c\/b\u003e is a compact, relay-driven automatic tuning HF antenna that automatically tunes across 2.5 MHz to 30 MHz frequencies to match your Icom HF radio output.\u003c\/p\u003e\n\u003ch4\u003eWhat is the frequency coverage of the Icom AH740?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eIcom AH740\u003c\/b\u003e covers 2.5–30 MHz using the included whip antenna and can operate down to 2.2–30 MHz when used with an optional NVIS antenna kit.\u003c\/p\u003e\n\u003ch4\u003eDoes the Icom AH740 include a spring mount?\u003c\/h4\u003e\n\u003cp\u003eYes, the \u003cb\u003eIcom AH740\u003c\/b\u003e includes a heavy-duty 131mm spring mount to protect the antenna whip and base from physical impact during vehicle transport.\u003c\/p\u003e\n\u003ch4\u003eWhich antenna connector is used on the Icom AH740?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eIcom AH740\u003c\/b\u003e utilizes a standard SO-239 female coaxial connector for 50 Ω input impedance matching.\u003c\/p\u003e\n\u003ch4\u003eWhich Icom transceivers work with the Icom AH740 tuner antenna?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cb\u003eIcom AH740\u003c\/b\u003e is compatible with Icom HF transceivers including the IC-7100, IC-718, IC-7300, IC-7300MK2, IC-7610, and IC-F8101.\u003c\/p\u003e\n\u003ch4\u003eIs the Icom AH740 a genuine Icom product?\u003c\/h4\u003e\n\u003cp\u003eYes, the \u003cb\u003eIcom AH740\u003c\/b\u003e is an original equipment manufacturer product manufactured directly by Icom.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e1-year manufacturer's warranty.\u003c\/p\u003e","brand":"Icom","offers":[{"title":"Default Title","offer_id":48944638623918,"sku":"AH740","price":2295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0062\/0845\/4744\/files\/AH740c.png?v=1787687205","url":"https:\/\/www.atlanticradiocorp.com\/products\/icom-ah740","provider":"Atlantic Radio Communications Corp. ","version":"1.0","type":"link"}