Apollo 11: How NASA Got All That RF From The Moon Back To Earth

This is a very good article that we hams might enjoy reading! It’s about the first moon landing in 1969, and how video, voice, and astronauts’ heartbeats were all sent back to Earth using frequencies and modes we are familiar with today. It was all analog stuff back then, and communications were sent “in the clear” without encryption. Of course, that meant some hams got to listen in!

Read all about it here:

https://www.rfcafe.com/references/electronics-world/communications-moon-electronics-world-august-1969.htm

Note that the “S” band microwave frequencies mentioned in the article are just a hair outside of our present 13 centimeter ham band that covers 2300 to 2450 MHz. A chunk of our 13 cm band (2310-2390 MHz) got taken away a few years back, and is now used by, among others, Sirius/XM satellite radio. If you’re one of their subscribers, it might be fun to know that the music coming out of the speakers in your car is from a satellite transmitting inside of an Amateur Radio band. Think about that while you’re driving around, listening to the Beatles Channel (Ch.18)! Oh, and of course, we also share almost half of the 2.4 GHz Wi-Fi and Bluetooth band with the world. Ask me sometime how we got there…