The article is interesting but some images have Error 400 so I can’t see them.

Previously:

Radios, how do they work? - https://news.ycombinator.com/item?id=39813679 - March 2024 (109 comments)

Cool article; I’m still baffled though.

I've been studying for my amateur radio license recently, and this article is a great introduction to the basics.

But really, if you want to get your hands dirty with some practical electronics, and also want to be able to communicate without relying much on nearby infrastructure, amateur radio is a great hobby.

This reminds me of a beautiful book written by Paul Nahin, 'The Science of Radio'.

To get an idea about radios, I made a crystal radio when I was in 7th grade, I only had few components. The only component I had difficulty in getting was the crystal oscillator (I was living in a rural town).

It was mind blowing when I first heard the audio through IEMs ! It felt magical that this contraption was working without any battery source.

Never thought about the AM bandwidth thing before that is interesting and seems obvious now (from Fourier Transform point of view)