... allows it to be conveniently installed near the antenna element base.For varies HF marine transceivers Onwa’s ... adjustments are necessary. Just connect the control cable and antenna wire and goQuick tune-upImproved tuning performance...the tune ... to other stations using the frequency.Antenna Tuner, HF Automatic Antenna Tuner, HF antenna tuner, Automatic Antenna TunerSPECIFICATION1) Dimensions: 230(W) ...