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Here is a free HF propagation program that is really free. I think those other posts were just link spam.


But if you ask me, all propagation programs are basically rubbish. You can't forecast propagation just by inputting a couple of solar numbers. I think propagation programs are useful to illustrate to newbies how in broad terms propagation changes from band to band from hour to hour, month to month and so on. But there are good days and bad days that these programs can't predict, which is why the DX will always be worked by the guy who decides to switch on his radio regardless of what the propagation programs say.