Hi Des, Here are Icom's frequency-coverage specs for various automatic couplers: AH-3: 1.8 - 30 MHz AT-120: 2-24 MHz AT-130: 1.6 - 30 MHz AT-140: 1.6 - 30 MHz None of them are designed to cover 6m. Cheers for now, 73, Adam VA7OJ/AB4OJ Scanned for viruses by Blue Coat http://www.WinProxy.com/