KFXB-TV is a television station based out of Dubuque, Iowa. The channel transmits digitally on UHF channel 43. Currently the channel is an owned and operated affiliate of the Christian Television Network.
KFXB has been digital-only since February 17, 2009.
KFXB has a long history in the Dubuque area. The station signed on September 12, 1976 as KDUB-TV, and was an ABC affiliate. It was the only television station to be based out of Dubuque. The KDUB call letters was originally used by CBS affiliate KLBK-TV in Lubbock, Texas from its 1952 sign-on until 1961.
KDUB was originally based in an office building just south of Dubuque, near Key West, Iowa. The station eventually moved into offices on the ninth floor of the former Roshek's Department Store building in downtown Dubuque, and later moved to its current location on Main Street.
KDUB signal transmission was a lower level of reception as a UHF channel. which was generally stronger signal broadcast overall — was available to the residents of Dubuque; in those areas that could receive good over the air quality was still quite good, and the Dubuque cable system carried as well as KDUB.
For a number of years, KDUB and KCRG-TV in conflict with each other. KDUB eventually won a decision in which the Dubuque cable company was required to black out when the same shows were shown at the same time on both stations. At one point KDUB sued claiming that interference caused a proposed deal to sell the station to fall through.
Finally, in 1995, the station entered into a management agreement with Second Generation of Iowa, owner of Cedar Rapids Fox affiliate KFXA (channel 28). It was then decided to discontinue the ABC affiliation and convert KDUB to a semi-satellite of KFXA, under the call letters KFXB; most programming was simulcast from KFXA, but KFXB would continue its news operation (at that time, KFXA had no newscast at all). Prior to this, the Fox network feed was retransmitted on the Dubuque cable system on channel 13. After a few years, it was decided to close down the Dubuque news operation, rendering KFXB a full satellite of KFXA. During this time the stations identified themselves as "KFXA-KFXB Fox 28/40."
In 2004, KFXB's owners, Dubuque TV Limited Partnership sold the station to the Christian Television Network, who switched the station to its primarily-religious programming. Fox programming would continue to be transmitted on KFXA - which would operate as the primary Fox affiliate for northeast Iowa. At this time KFXB lost its longstanding channel 4 assignment on the Dubuque cable system to KFXA, with KFXB being moved to channel 14.
KFXB added cable coverage of the Cedar Rapids and Iowa City areas on Mediacom cable in 2005.