![Goltone crystal radio by Goldstone (~1923): Like modern passive RFID chips, crystal radios a hundred years ago didn't need their own power-supply. There was enough energy in the transmitted radio signal to Goltone crystal radio by Goldstone (~1923): Like modern passive RFID chips, crystal radios a hundred years ago didn't need their own power-supply. There was enough energy in the transmitted radio signal to](https://i.redd.it/ozszki78j6ga1.png)
Goltone crystal radio by Goldstone (~1923): Like modern passive RFID chips, crystal radios a hundred years ago didn't need their own power-supply. There was enough energy in the transmitted radio signal to
![1923 Ad Moon Radio Long Island Communication Music Montreal Quebec SCA – Period Paper Historic Art LLC 1923 Ad Moon Radio Long Island Communication Music Montreal Quebec SCA – Period Paper Historic Art LLC](https://www.periodpaper.com/cdn/shop/products/SCA3_439.jpg?v=1571709186)
1923 Ad Moon Radio Long Island Communication Music Montreal Quebec SCA – Period Paper Historic Art LLC
![First Portable Superheterodyne Radio Receiver, Made by Edwin Howard Armstrong, 1923 - The Henry Ford First Portable Superheterodyne Radio Receiver, Made by Edwin Howard Armstrong, 1923 - The Henry Ford](https://thfemu.s3.amazonaws.com/CollectionImages/_social/photos/thf156549.jpg)