Wayne, can you please help with this? The wltnc.zip file that is used to build the RTTY TNC example won't compile because both wltnc.h and wltnc_i.c are missing. I double checked the .zip file and they aren't included there. Am I doing something wrong? I'm using VC++ 6.0 and opening wltnc.cpp and wltnca.cpp and trying to compile them. Appreciate any suggestions, Al, K7AR