Uploaded April 2013 | Updated September 2026, 3 weeks ago

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How to make an AM radio transmitter for use with a crystal radio or a normal AM radio. This simple circuit uses an oscillator chip and a transformer to take input from a sound source and turn it into radio waves, transmitted using an antenna. I test it with a CD player as the sound source but it may also work with an iPod or iPhone, though it may need some amplification for that.

WARNING: Do not transmit more than 1 or 2 meters/yards otherwise you'll interfere with other radios. In many countries it is illegal to transmit without a license.

For how to make the homemade crystal radio, watch "How to Make/Build a Crystal Radio":
youtu.be/VqdcU9ULAlA

For how to make the crystal earpiece watch "Make Crystal Earphone/Earpiece for Crystal Radio - Homemade":
youtu.be/OVapqz4yBCY

For how to make a lifter or ionocraft, watch "How to Make a Lifter":
youtu.be/vzZy1Aqleno

My webpage about how to make a simple AM radio transmitter:
rimstar.org/science_electronics_projects/make_simple_am_radio_transmitter.htm

Where to get a 1 megahertz oscillator chip and an audio transformer:
scitoyscatalog.com/category/R.html

Follow behind-the-scenes on:

Twitter twitter.com/#!/RimStarz

Google+ plus.google.com/116395125136223897621

rimstar.org

Music used for background:
The Path of the Goblin King Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0
ISRC: USUAN1100873