> On the OPC-478 only the Sleeve and Ring are used the Tip is open. > Ring is hot, Sleeve is ground. > > So connect Ring to Tip and Sleeve to Sleeve. As CI-V uses Tip > and Sleeve > > Gary K8IZ Yep - just figured that out. THANKS GARY.... ICOM lost a good tech when you left. But I am happy you are doing well. Mike.