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The ATU option (KHATU1) greatly enhances the KH1’s versatility. It includes:

  • an automatic antenna tuner unit (ATU) that works with both the BNC jack and whip
  • internal whip-matching network for use on 20/17/15 meters (30 m at higher SWR / lower power)
  • telescoping whip, plus two clips that retain the whip on the side of the KH1 when not in use
  • 13’ counterpoise wire suitable for 30-15 m use (with the ATU)