In my manual, the pinout diagram for the DB-25 connector is on page 4.39, which also shows the schematic for the TX Audio board. 73, Mike - WB4HUC Austin, TX http://wb4huc.home.texas.net -- FAQ on WWW: http://www.contesting.com/FAQ/tentec Submissions: tentec@contesting.com Administrative requests: tentec-REQUEST@contesting.com Problems: owner-tentec@contesting.com