I use the interface described in the July 1992 issue of QST, pages 37 & 38. It is very simple -- only four transistors, two diodes, a hand-full of resistors and a capacitor -- no chips. It works fine. -- Mark D. Johns, K0MDJ (formerly WA0RGV) Cedar Falls, Iowa EN32sm "Heaven goes by favour. If it went by merit, you would stay out and your dog would go in." -- Mark Twain John Breland wrote: > I need some feedback regarding CI-V interfaces. Anyone out there have > experience with CI-V interfaces from different manufacturer's? I have a > single-unit interface from a company called RT Systems in Huntsville, > Alabama, but it seems to be "quirky". Sometimes it "works" and sometimes > it does what it "wants to". It is also more difficult to use on some of my > radios than others, but not necessarily just the Icoms. I am not certain > if it's the interface or something I'm doing wrong, so I need advice on a > rock-solid unit to purchase next.