Why do AM radio stations reduce power at night?

Why do AM radio stations reduce power at night?

Most AM radio stations are required by the FCC’s rules to reduce their power or cease operating at night in order to avoid interference to other AM stations. However, during nighttime hours the AM signals can travel over hundreds of miles by reflection from the ionosphere, a phenomenon called “skywave” propagation.

Why do we hear some radio stations better at night than during the day?

Why do radio frequency waves behave differently during day and night ? Perhaps, ionosphere is responsible because solar UV radiation (SUVR) usually enhances the ionization rate whereas SUVR is absent at night. It may be denser in daytime and dilute or weak plasma at night.

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How can I boost my FM radio signal?

The best thing for the rest of us to do is to use (or re-purpose) a TV antenna that’s already on your roof. If you still use it to receive off-air TV, then get an inexpensive TV-FM splitter. Or if you’ve switched to cable-TV or satellite-TV, then just connect your old TV connection to your FM radio.

Why do radio signals travel farther at night than in the day?

On the other hand, FM stations don’t have to do any of this as the ionosphere doesn’t greatly affect their signals, which has the side benefit (or disadvantage, depending on your point of view) of severely limiting the range of the FM signals, which rely on groundwave propagation.

How many miles does an AM radio signal carry?

AM broadcast signals by nature can carry for hundreds, if not thousands of miles at night. Radio hobbyist have been DX’ing since radio was first invented over 100 years ago. Many DX’ers keep journals of all the stations they have heard. This is probably the most rewarding low dollar radio related hobby there is.

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What is the hobby of listening to radio signals?

AM broadcast DX’ing is the hobby of trying to “catch” as many far away AM radio stations as you can. AM broadcast signals by nature can carry for hundreds, if not thousands of miles at night. Radio hobbyist have been DX’ing since radio was first invented over 100 years ago. Many DX’ers keep journals of all the stations they have heard.

What causes unusually long distance radio reception in Atlantic City?

This turned all that metal into a giant antenna. As it is, solar flares are known to cause “skip frequencies”, enabling unusually long-distance radio reception on the AM band. I was in Atlantic City NJ and was getting the mighty WLS radio station which is in Chicago.