6 Jan 2017
Years back I made a short-wave crystal set and heard some impressive DX with it including Radio Australia and Radio Havana. Both these and many others were NOT more local relays. Radio Australia was a real catch and totally amazed me at the time.
See http://www.vintageradio.me.uk/crystal/boys_book_xtal.htm .
There is also some information on my main website. Crystal sets are easy to make and capable of surprising results.
See https://sites.google.com/site/g3xbmqrp3/hf/crystalset .