
I got interested in
Echolink after doing some work with John Habbinga and seeing his well organized
system. I found a
simple circuit that I slightly
modified for use with the Icom commercial mobiles. The connections to the radio are made with an OPC-617 or
compatible cable. Don't let the schematic scare you, It's not that hard to build on a small "perf" board.
Pic 1,
Pic 2

Catch me on node 360935
12-16-07
Just wanted to show how small you can build the interface: