Shortwave broadcasting has changed a lot in recent years as more switch to the internet to get their message across. The internet is lower cost and generally much higher quality.
Having said that you may be amazed just what can be heard on a humble crystal set on HF. A few years ago I had quite a bit of success.
There are bigger schematics and photos on the webpage below. Remember all the power comes from the TX end.
See https://sites.google.com/site/g3xbmqrp3/hf/crystalset
10 Aug 2019
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