Hi there..
I have tried to post three times now, so forgive me if there is a multiple post. I have just completed my webpage for the newest Icom interface project. I have successfully interfaced a 211, and the 701 is the same protocol except it also requires an analog voltage for switching. I have made accomodations for this in my new design. I have not tested a 701 yet because i don't have one in my possession. If you want to check out the webpage, it is at
http://home.comcast.net/~tinkyr/radi...0Interface.htm There is also a link to my youtube site so you can see videos of the interface working. This has been a lot of work, and if you have interface questions about these radios, i will be happy to share what i have uncovered.
73 Dave KA6BFB