On Dec 21, 2007 11:26 PM, Stuart Rohre <rohre at arlut.utexas.edu> wrote: > you can use the Radio Shack 500 ohm/ 1000 ohm to 8 ohm > transformer between the sound card output and the rig. > I think he really needs a 1:1 isolation transformer, like http://www.radioshack.com/product/index.jsp?productId=2103994 73, Barry N1EU