How do you get the music up in the air?
Tuesday, March 3rd, 2009Hey Jumpiteerz!
Talk about funny things kids say, the Official Radio Station of Texas State University – San Marcos was giving the local Boys & Girls Club a tour of the KTSW radio station today and one of the kids asked how do you get the music up in the air? and posted it on Twitter.
There is no easy way to explain this to a kid but you can make a radio very easily.
Here’s what you need:
- Take a fresh 9-volt battery and a coin.
- Find an AM radio and tune it to an area of the dial where you hear static.
- Now hold the battery near the antenna and quickly tap the two terminals of the battery with the coin (so that you connect them together for an instant).
- You will hear a crackle in the radio that is caused by the connection and disconnection of the coin.
![]() By tapping the terminals of a 9-volt battery with a coin, you can create radio waves that an AM radio can receive! |
Your battery/coin combination is a radio transmitter! It’s not transmitting anything useful (just static), and it will not transmit very far (just a few inches, because it’s not optimized for distance). But if you use the static to tap out Morse code, you can actually communicate over several inches with this crude device!
You can learn more about how radio works as well as anything else you can imagine at the How Stuff Works website.
You can follow KTSW on Twitter @KTSW_899

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