Hi Mike, The IC-781 has a much quieter synthesiser than the IC-751A. It uses the same DDS chipset as the IC-275, IC-575 etc. This yields much lower LO phase noise - a definite plus when receiving close-in weak signals. Cheers for now, 73, Adam VA7OJ/AB4OJ Scanned for viruses by Blue Coat http://www.WinProxy.com/