Due to the success of DZBB, Stewart ventured into television on October 29, 1961 as DZBB-TV Channel 7 with the branding of RBS-7 (now known as GMA-7 Manila). The station was seized and closed in September 1972 due to Martial Law. Two years later, due to changes in media ownership laws, Channel 7, DZBB and their other sister provincial radio and television stations were eventually sold to the triumvirate of Gilberto Duavit, Sr., Menardo Jimenez and Felipe Gozon. At the same time, DZBB returned to the airwaves under the branding "Dobol B", which would later be rebranded to simply DZBB 594 kHz; and became a music-personality radio station. The station also covered important news coverages during the 70s and the 80s. In November 1978, DZBB moved to the present frequency of 594 kHz, in response to the adoption of the 9 kHz spacing on AM radio stations in the Philippines under the Geneva Frequency Plan of 1975.