Bound to happen! A friend of mine needs the adapter in order to use his new used IC2KL and AT500 with his ProII. It is no longer available. Any source for the schematic of the adapter? The rest of the cabling is easy. Certainly would save some time and brain strain building one. I'm getting lazy in my declining years <g>. I have checked the .jp site with no luck. TIA Dave, W5WP