KMYS

The station first signed on the air on November 6, 1985 as KRRT, taking the callsign from its city of license, KeRRville, Texas. It was the first English-language general entertainment independent station in the San Antonio market, as well as the first English-language commercial television station in San Antonio since KONO-TV (channel 12, now KSAT-TV) signed on in January 1957. In addition, it was the second television station in the market on the UHF dial, launching 30 years after what is now Spanish-speaking and Univision owned and operated station KWEX-DT.

Prior to the station's launch, San Antonio was the largest television market in the United States that did not have an independent station. Despite the large population of San Antonio proper (it had around 900,000 residents at the time the station signed on), San Antonio has always been a medium-sized market because the surrounding suburban and rural areas, then as now, were not much larger than San Antonio itself. San Antonio had been large enough to support an independent since at least the early 1970s. However, the market is a fairly large one geographically, and UHF stations do not carry very well across large areas. By the early 1980s, cable had gained enough penetration for a locally based independent to be viable.

The station was founded by the TVX Broadcast Group, and operated from studio facilities located in Loop 410, near Ingram Park Mall, on the northwest side of the city.[2] Shortly before its sign-on, the station built a 473.3-meter (1,553 ft), guy-wired aerial transmitter near Lakehills to house its transmitter.

As part of a groupwide affiliation deal with TVX, KRRT became a charter affiliate of the Fox Broadcasting Company when the network launched on October 9, 1986. Paramount Pictures acquired a minority ownership interest in TVX in 1989; it would acquire the remaining interest in the company in 1991, changing its name to the Paramount Stations Group. At the time, KRRT was Paramount's smallest television station by market size.

In 1994, Paramount entered into a partnership with Chris-Craft Industries—which ironically owned NBC affiliate KMOL-TV (channel 4, now WOAI-TV) at the time—to create the United Paramount Network (UPN), with KRRT serving as the network's San Antonio affiliate; while Chris-Craft Industries was the sole owner of the network initially, Paramount supplied most of its programming (Paramount parent Viacom acquired a 50% interest in UPN in 1996). Subsequently, River City Broadcasting signed an affiliation agreement for independent station KABB (channel 29) to become the market's new Fox affiliate. On January 16, 1995, KRRT became a charter affiliate of UPN, with KABB assuming the Fox affiliation. Later that year, Paramount sold the station to Jet Broadcasting, which then entered into a local marketing agreement with River City. As part of the agreement, KABB took over KRRT's operations.

The arrangement was inherited by the Sinclair Broadcast Group following its acquisition of River City in 1996. Jet Broadcasting then sold the station to Glencairn, Ltd. (now Cunningham Broadcasting) in 1997. The family of Sinclair founder Julian Sinclair Smith owned 97% of Glencairn's stock (Glencairn was, in turn, to be paid with Sinclair stock for the purchases). For all intents and purposes, KABB and KRRT were a duopoly in violation of FCC rules of the period. Glencairn had owned eleven television stations nationwide that Sinclair operated under LMAs; a later plan to sell five of its stations to Sinclair outright prompted the Rainbow/PUSH coalition (headed by Jesse Jackson) to file challenges, citing concerns over a single company holding two broadcast licenses in one market and arguing that Glencairn passed itself off as a minority-owned company (its president, former Sinclair executive Edwin Edwards, is African American) when it was really an arm of Sinclair, and used the LMA to gain control of the station.[3][4] KRRT moved its operations to KABB's studios on Babcock Road.

On July 21, 1997, Sinclair signed an affiliation agreement with The WB to switch the affiliations of KRRT and its four other UPN affiliates to the network.[5] Prior to the agreement, San Antonio residents were only able to receive The WB's programming through cable and satellite from the national superstation feed of the network's Chicago affiliate WGN-TV. KRRT affiliated with The WB on January 25, 1998, rebranding as "WB 35", although it later branded itself verbally as "San Antonio's WB". As a result, KMOL-TV began carrying UPN programming during the overnight hours as a secondary affiliation; the network would not have a full-time affiliate or have its prime time programming air in pattern until Fredericksburg-licensed KBEJ (channel 2), which at that time served both Austin and San Antonio, signed on in August 2000.

In the following years, KRRT's syndicated programming inventory shifted away from sitcoms (such as Family Matters, The Cosby Show, Married... with Children and The Andy Griffith Show) and movies, towards running more talk, reality and court shows (such as Judge Mills Lane and Judge Judy). It also gradually reduced cartoons from its schedule (including the Disney series Hercules: The Animated Series and Doug), The Real Adventures of Jonny Quest and Pocket Dragon Adventures. during the late 1990s, eventually limiting them mainly to the WB-provided programming block Kids' WB. After the FCC levied a $40,000 fine against Sinclair in 2001 for illegally controlling Glencairn,[6] Sinclair purchased KRRT outright, creating the market's first television duopoly with KABB.

On January 24, 2006, the Warner Bros. unit of Time Warner and CBS Corporation announced that the two companies would shut down The WB and UPN and combine the networks' respective programming to create a new "fifth" network called The CW.[7][8] On February 22, 2006, News Corporation announced the launch of a new "sixth" network called MyNetworkTV, which would be operated by Fox Television Stations and its syndication division Twentieth Television.[9][10]

"My35" logo utilized by the station until August 2010.

KRRT was considered to be the likely candidate to become San Antonio's CW affiliate, since KBEJ had a rimshot signal that barely covered portions of the San Antonio and Austin metropolitan areas; most residents in both markets needed cable or satellite to get an acceptable signal from KBEJ. However, on March 2, 2006, Sinclair announced that most of its WB and UPN affiliates, including KRRT, would instead join MyNetworkTV; the CW affiliation ultimately went to channel 2—which changed its call letters to KCWX shortly afterward; this resulted in the station being dropped from Time Warner Cable's Austin system due to syndication exclusivity claims made by KNVA, which became that market's CW affiliate. To reflect the new affiliation, channel 35's call letters were changed to KMYS on June 19, 2006.

In September 2006, KABB stopped carrying Fox's children's program block, 4Kids TV; that station had carried the network's children's programming since the January 1995 affiliation swap with channel 35, it was moved to KMYS in order to accommodate the launch of a (short-lived) weekend expansion of its morning newscast Fox News First. The lineup remained on KMYS until 4Kids TV was discontinued by Fox (due to a dispute between the network and the block's lessee 4Kids Entertainment) in December 2008, after which Fox permanently discontinued providing network-supplied children's programming. The infomercial block that replaced 4Kids TV, Weekend Marketplace, was also rejected by KABB and likewise, airs instead on KMYS.

On February 12, 2010, Sinclair Broadcast Group signed an agreement with The CW to move its San Antonio affiliation from KCWX to KMYS;[11] as a result, KMYS became the market's CW affiliate on August 30, with the MyNetworkTV affiliation moving to KCWX (ironically, the call letters of both stations continue to reference the affiliations they assumed in September 2006 following the respective shutdowns of The WB and UPN).[12] This affiliation swap made KMYS the only television station in the United States to have been affiliated with all five of the major television networks that have debuted since 1986.

KMYS retained Weekend Marketplace on Saturday mornings, but opted to air The CW4Kids/Toonzai over two shorter blocks with the first two hours airing from 3:00 to 5:00 a.m. on Sunday mornings and the last three hours of the block airing from 2:00 to 5:00 a.m. on Monday mornings. Toonzai was replaced by Vortexx on August 25, 2012; however, KMYS continued to air that block in those same timeslots. Likewise, Vortexx's successor, Litton Entertainment's One Magnificent Morning, is carried in the same scheduling pattern (KMYS carries Litton's syndicated Go Time block as a weekday morning strip program in syndication, which features a 'best-of' selection of Litton's programming over the years, fulfilling the station's E/I programming requirements). As such, it is one of a handful of CW affiliates that does not air the network's children's program block in pattern, and one of the few stations in the country that air their affiliated network's children's programming at a time when the lineup's target audience would likely require the use of a DVR or the network's website to watch (WISN-TV in Milwaukee aired the non-E/I programming from ABC's now-defunct ABC Kids lineup on early Monday mornings before World News Now in 2005 before receiving network permission to drop it entirely). On October 9, 2017, the OMM block began airing on the station locally from 1:30 a.m. to 4:30 a.m.

On July 19, 2012, Sinclair announced that it would sell the license assets of KMYS to Deerfield Media (which acts in a similar structure to Glencairn/Cunningham Broadcasting in its relationship with Sinclair), in order to comply with FCC duopoly regulations following its purchase of WOAI-TV from Newport Television. As WOAI and KABB respectively ranked at fourth and fifth place with KMYS ranking sixth overall in the San Antonio market in terms of sign-on to sign-off viewership, the formal creation of the new duopoly between WOAI and KABB and the sale of KMYS to Deerfield received Federal Communications Commission approval that November. The transactions were completed on December 3, 2012; however, Sinclair retained control of KMYS' operations through joint sales and shared services agreements.[13][14]

Although Sinclair controls all three stations, the operations of KMYS and KABB initially remained separate from that of WOAI-TV. Sinclair is in the process of moving certain WOAI operations from its longtime downtown studio on Navarro Street to a new building adjacent to KABB and KMYS' shared Babcock Road facility, which is expected to be finalized by the summer of 2014, with the news staffs of both stations fully operating out of a shared newsroom on the second floor of the main building.[15][16]

The station's digital signal is multiplexed:

KMYS is one of many CW affiliates owned and/or operated by Sinclair that transmits their main channel in the 720p high definition format, instead of The CW's default 1080i resolution format.

KMYS carried MundoMax on its subchannel until May 2016. It started airing programming from the American Sports Network (forerunner to Stadium) at the start of June 2016.

On February 2, 2009, Sinclair told cable and satellite television providers via e-mail that regardless of the exact mandatory switchover date to digital-only broadcasting for full-power stations (which Congress rescheduled for June 12 days later), the station would shut down its analog signal on the original transition date of February 17,[18] making KABB and KMYS the first television stations in the market to convert to digital-only broadcast transmissions.

KMYS discontinued regular programming on its analog signal, over UHF channel 35, on February 17, 2009, the original target date for full-power television stations in the United States to transition from analog to digital broadcasts under federal mandate (which Congress had moved the previous month to June 12). The station's digital signal remained on its pre-transition UHF channel 32,[19][20] using PSIP to display its virtual channel as its former analog channel 35.