On Apr 5, 2010, at 9:48 AM, Joe Subich, W4TV wrote: There is no value to the Signalink that can't be provided by much less expensive USB based soundcards ___________ The SignaLink schematic shows the same type of isolation transformers already standard in the KIO3. http://www.tigertronics.com/sl_mods.htm 73 - Steve WB6RSE