点击👆一点电子👇关注我，右上角“...”设为 ★星标★，技术干货第一时间送达！ 为什么普通的音频功放在某些情况下可以直接收听到调频电台的声音？它是如何将空间传播的高频电磁波放大检波之后，还原出声音的呢？ 要理解这一点，需要稍微比在大学 ...

“You can’t put new wine in old bottles” – so the saying goes. But you would if you’re a hacker stuck with a radio built in 2005, which looked like it was put together using technology from 1975.