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There are basically two radio broadcast bands as we know them. One is the AM (amplitude modulation) band, and the other is the FM (frequency modulation) band. The AM band is from 520 KHz to 1700 KHz (0.52 MHz to 1.7 MHz). The FM band is from 87.5 MHz to 108.0 MHz. Other bands are used commercially, but these two bands represent the broadcast bands used in the U.S.

Note: 1 KHz = 1,000 Hz (Hertz, cycles per second, or cps), and 1 MHz = 1,000,000 Hz

In the USA ...

-- Commercial AM radio stations operate with carrier frequencies

spaced every 10 KHz between 550 KHz and 1700 KHz.

-- Commercial FM radio stations operate with carrier frequencies

spaced every 200 KHz between 88.1 MHz and 107.9 MHz.

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