I used the crystal radio that is one of the steps described in this [1] book a fair bit. My grandfather taught me how to make proper PCBs after this and built m

I used the crystal radio that is one of the steps described in this [1] book a fair bit. My grandfather taught me how to make proper PCBs after this and built more complicated radios with him. [1] https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Making-a-Transistor-Radio-Ladybird%20Books-1972.pdf https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/M...