The group signed on a similarly formatted station, KTXA in Fort Worth, in January 1981.
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The two stations share studio facilities located on Southwest Freeway in Houston (between the Uptown and Greenway Plaza districts); KTXH transmitter is located in unincorporated northeastern Fort Bend County (near Missouri City).
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Channel 20 became an owned-and-operated station of the United Paramount Network (owned by Chris-Craft Industries in a programming partnership with Viacom, and later co-owned in a joint venture with Chris-Craft when it bought a 50% share in the network in 1996) upon the network's January 16, 1995 launch.
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The station first signed on the air on November 7, 1982, becoming the third independent station in Houston, after KRIV (then owned by Metromedia), and Gaylord Broadcasting's KHTV (channel 39, now Tribune Broadcasting-owned KIAH).