Guys, ANC-4 noise canceller $80 Works fine. With manual and power cube. Can also be used as rx ant preamp. Was repaired once by manufacturer. Turns out that operating it in a 1.5 kW environment burned out some 1/16 watt resistors. Mfgr replaced them with 1/4 watt ones. 73 de Brian/K3KO 252-431-1153