After the liberalization of French radio in 1981, new stations sprang up across the country, including four Jewish stations in the Paris area. In 1983, the (HACA), then the French broadcast regulator, ordered the Jewish community radio stations to broadcast to the Paris area in a time sharing agreement:
Radio Shalom, Radio J, Radio Communauté (renamed
RCJ in 1992), and
Judaïques FM. The stations reflected different components and points of view of the Jewish community. Groups close to the various stations called the time-sharing agreement a "congenital flaw" and "radio aberration". In 2005, Radio J ended an agreement by which it used the same advertising management as Radio Shalom after a dispute emerged over an advertisement promoting a pilgrimage to a Tunisian synagogue, which Radio Shalom was willing to air but not the other stations.
Consolidation with Judaïques FM In 2018, took operational control of Radio J and Judaïques FM. At that time, both stations moved to the same facilities, though they remained separate for regulatory purposes, and began to share news and other resources. was named the director of Radio J. In 2020, the two stations announced that, with CSA approval, they would combine as Radio J, though still retaining separate operating authority. The combined station would share social media accounts and also be rated as one station by
Médiamétrie. All existing programs would remain unchanged. The combined station broadcasts during Radio J's former hours of 4:00 to 8:00 and 14:00 to 16:30 as well as from 8:30 to 11:00, 21:00 to 23:00, and midnight to 2:30, time periods formerly associated with Judaïques FM. ==Programming==