![New top story on Hacker News: How to Make a Crystal Radio – No Batteries, No External Power (2015) [video]](https://3.bp.blogspot.com/-KYs7bNsL5eQ/V2d1Z0U4Y7I/AAAAAAAAm-Y/VPHnY95ua4ILVJDoP-FicZ8tPJpQpza5QCLcB/s600/no-thumbnail.jpg "New top story on Hacker News: How to Make a Crystal Radio – No Batteries, No External Power (2015) [video]")
New top story on Hacker News: How to Make a Crystal Radio – No Batteries, No External Power (2015) [video]
How to Make a Crystal Radio – No Batteries, No External Power (2015) [video]
40 by humbfool2 | 14 comments on Hacker News.
40 by humbfool2 | 14 comments on Hacker News.
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