The HF broadcast scene is quite a lot different from when I last seriously listened some years ago: there are far fewer English language services to be heard. I guess these days people who want to find out about different countries listen to broadcasts on the internet.
Also, the CW maritime services, which could be perfectly copied sometimes on a crystal set as a result of cross-modulation (the CW sounded like a raspy hiss keyed) are long gone. One of my interests some years ago was seeing how many HF marine coast radio stations I could positively ID on a simple crystal set: the answer was quite a few around western Europe.
In fact SWLing on HF is rather a dying scene I think, although devotees will no doubt disagree.
