KOKX is a commercial radio station

Radio station

Radio broadcasting is a one-way wireless transmission over radio waves intended to reach a wide audience. Stations can be linked in radio networks to broadcast a common radio format, either in broadcast syndication or simulcast or both...

 serving the Keokuk, Iowa

Keokuk, Iowa

Keokuk is a city in the southeastern part of the U.S. state of Iowa and one of the county seats of Lee County. The other county seat is Fort Madison. The population was 11,427 at the 2000 census. The city is named after the Sauk Chief Keokuk, who is thought to be buried in Rand Park...

 area. The station primarily broadcasts an adult standards

Adult standards

Adult standards is a North American radio format heard primarily on AM or class A FM stations.Adult standards is aimed at "mature" adults, meaning mainly those persons over 50 years of age, but it is mostly targeted for senior citizens...

 and information format. KOKX is owned by Russell Withers, Jr.

During daytime broadcasts, the station uses a single tower with essentially an omnidirectional

Omnidirectional

Omnidirectional refers to the notion of existing in every direction. Omnidirectional devices include:* Omnidirectional antenna, an antenna that radiates equally in all directions* VHF omnidirectional range, a type of radio navigation system for aircraft...

 pattern. During the nighttime, KOKX reduces power and switches to an antenna system that uses three towers arranged in a directional array

Directional array

In broadcast engineering, directional array refers to an antenna array arranged such that the superposition of the electromagnetic waves produce a predictable electromagnetic field...

that concentrates the signal toward the northwest.