We are regulated in Canada by bandwidth and it works just fine here. I have read some of the comments about why it won't work but honestly... I haven't encountered any of those situations here. Maybe if the USA went to that system it would cause headaches and the situations described but if other countries can self police and have harmony I don't know why the US should be any different. We have a voluntary band plan and a regulated set of bandwidths and it works nicely. Anyway that's my 2 cents worth but HF communications would be simply marvelous if everyone was on the same page in terms of digital communications.
Paul VE9NC BTW Please don't throw rocks at me... I am having a bad day.