Making a Foxhole radio Very primitive

I made my own Foxhole Radio, the most primitive radio receiver. You can hear AM radio sound even without power.
Modified radio with soviet made germanium diode → https://youtu.be/49fr1Vgy_bg
Foxhole Radio wiki ↓
https://en.wikipedia.org/wiki/Foxhole...
Twitter: https://twitter.com/ichiken_make

★ Equipment used (including amazon associate link)
Crystal earphone https://amzn.to/3ftxsue
Timber
Copper wire (enamel wire) 0.5mm, about 20m Obtained at home centers
Obtained at home centers, etc., about 20 cm of solid copper wire
pencil
Cutter blade
Wood screw

★ Playlist
Raspberry Pi https://www.youtube.com/playlist?list...
Electronic work https://www.youtube.com/playlist?list...
Electrical explanation https://www.youtube.com/playlist?list...

★ Business inquiries: inquiry@ichiken-engineering.com
★ Click here for channel registration https://www.youtube.com/channel/UCGhu...

music: Kevin MacLeod, The Big Beat 80's.