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Icom antenna loading coils in tube, set of 3
Set of three Icom antenna loading coils supplied in a protective tube. These compact loading coils are designed to be installed on compatible Icom radio antennas to change the electrical length and assist antenna tuning across specific HF/VHF frequency segments. Housed together in a transport tube, the set is intended for field use, mobile installations and antenna experiments where small, portable matching elements are required.
The set provides three distinct loading coils in a single protective tube for convenient storage and transport. Each coil allows incremental adjustment of an antenna's electrical length without needing to modify the antenna mast or feedline. The compact, non-permanent installation supports rapid fitting and removal during field deployments or temporary installations. The tube protects components from mechanical damage and simplifies organization of multiple coils.
Choose the coil that provides the closest electrical length adjustment required for the target frequency. Fit the selected coil to the antenna according to the antenna manufacturer's guidance, ensuring secure mechanical and electrical contact where required. Verify antenna resonance and SWR with an antenna analyser or SWR meter after fitting, and if necessary swap coils from the tube to refine tuning. Remove the coil before permanent installations if a fixed antenna length or different matching method will be used.
Store the coils in the protective tube when not in use to prevent bending or contamination. When testing on live transmitters, start at low power and monitor SWR to avoid mismatches that could damage radio equipment. Use appropriate fastening methods to ensure coils remain secure during mobile operation.
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