Ok, totally confused by the zero beat to WWV. I can zero beat an un-oscillated WWV carrier at two points, in USS and LSB. When they add the odd-hour 600hz tone, things become even more confusing. I suppose I am relagated to obtaining a spectrum analyser, but which mode should I use to zero beat when I do so? USB, LSB or CW? Killing me here... KQ4FW - Joe