用了二個電晶體的收音機

https://www.pinterest.com/pin/461478293052433057/?utm_campaign=rdpins&e_t=dae6fd6ce9a74ffd8b4c19c09d405632&utm_content=461478293052433057&utm_source=31&utm_term=7&utm_medium=2004&fbclid=IwAR2_DQSw4hA3hVG9r8E5fhOskKI191IEascl3sd2VboSzyEzX2bfwcEe0j0

看到沒？面板刻意寫著二個電晶體...
想來當年電晶體剛發明時也是很炫的玩意啊～就如同現在要鼓吹用了真空管一般...


喔，沒加S...