Icom OPC2321 6m Control Cable Adapter for AH740

4-Pin Control Cable Adapter 6-meter (19.7 ft) antenna tuner control cable adapter for the Icom AH740 automatic tuning antenna. The Icom OPC2321 is a genuine OEM control cable adapter engineered to connect compatible Icom HF transceivers directly to the AH740 automatic tuning antenna system. Measuring 6 meters (19.7 feet) in length, this heavy-duty control cable routes power and control signals from the transceiver to the tuner unit, enabling fully automated frequency matching across the HF band. Featuring a 4-pin interface connector, the Icom OPC2321 allows the radio to control relay switching inside the antenna base upon pressing the radio's TUNER control button. Manufactured with shielded conductors and weather-resistant insulation, the Icom OPC2321 ensures reliable communication between the radio chassis and vehicular or fixed-station tuner installations without signal interference. Key Features & Benefits 6-Meter (19.7 ft) Reach: Extended cable length allows flexible routing from under-dash or desktop radios to exterior antenna mounting positions. Standard 4-Pin Interface: Direct plug-and-play adapter design fits standard Icom 4-pin tuner control sockets. Automated Tuner Control: Sends tuning commands and DC power directly from the transceiver to the AH740 tuning base. Shielded Conductor Build: Insulated multiconductor wire prevents RF feedback and electromagnetic noise interference. Factory OEM Construction: Genuine Icom cable ensures full voltage regulation and system communication integrity. Specifications Attribute Details Brand Icom Model/SKU OPC2321 Product Type Antenna Tuner Control Cable Adapter Cable Length 6 meters (19.7 feet) Connector Type 4-Pin Control Plug Target Accessory AH740 Automatic Tuning Antenna Operating Environment Vehicular & Fixed Station Installs Compatibility HF Transceivers 7100 718 7300 7300MK2 7610 78 Antenna Tuners AH740 Recommended Accessories Antenna Tuners & Kits Icom AH740 Compact Automatic Tuning HF Antenna (2.5-30MHz) – Relay-driven automatic HF antenna tuner powered by the OPC2321 control cable. More Resources How Icom Radios Serve Maritime and Coastal Operations Programming Icom Radios for Multi-Shift Operations Common Applications for Icom Radios Outside of Business 15 Myth-Busting Facts About Two-Way Radio Range Browse All Icom Two-Way Radio Accessories & Parts Frequently Asked Questions What is the primary function of the Icom OPC2321 cable? The Icom OPC2321 is a 6-meter control cable adapter used to connect Icom HF transceivers to the AH740 automatic tuning antenna. How long is the Icom OPC2321 control cable? The Icom OPC2321 cable measures 6 meters (approximately 19.7 feet) in length. What type of connector is used on the Icom OPC2321? The Icom OPC2321 features a 4-pin tuner interface connector designed to plug into standard Icom transceiver control ports. Can the Icom OPC2321 be used with the 7300 radio? Yes, the Icom OPC2321 is fully compatible with the 7300 transceiver when interfacing with the AH740 antenna tuner. Which transceivers support the Icom OPC2321 cable adapter? The Icom OPC2321 is compatible with Icom transceivers including the 7100, 718, 7300, 7300MK2, 7610, and 78 models. Is the Icom OPC2321 an authentic Icom accessory? Yes, the Icom OPC2321 is a genuine original equipment manufacturer cable manufactured directly by Icom.   Warranty 1-year manufacturer's warranty.