Re: 51 73's and 51's basically means best wishes to you and yours, all the best goodbye. usually said at the end of a QSO(conversation) hello by the way and welcome
Re: 51 Good question Jimmy, I can not find the history to 51, only 73.
So the answer is, I dont know. I know why it is said and what it means, but why and what the history is, I have no idea. If you find out post it here so we can all learn