Snip >In any case the best way to get >a clean CW signal out of most rigs is to use CW mode and an key input, >NOT SSB and a keyed audio tone input. Snip That is what this thread was about! The method a SSB rig uses to create CW. A great many rigs use a single sinusoid audio tone to create a psuedo CW signal. An interesting thread. Jim wd4air