The complete circuit project above can be found at:
Very detailed, with pictures, photographs, circuit enhancements, etc.
Once you get started reading the 'Techlib' website, there's no stopping! Have fun!
Below are a couple other related links to check:
The circuit as published above is used only as a logo to indicate "Crystal Radio" (hence no component values), and is
copyright © Charles Wenzel and Techlib.com. Used with permission.
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Copyright © Tony van Roon