WKVM

WKVM (810 kHz) is a non-commercialAM radio station in San Juan, Puerto Rico. The station is owned by Grupo RTC, under its licensee, the Catholic, Apostolic & Roman Church in Puerto Rico. It airs a mix of Catholic radio programs along with some non-religious shows.
WKVM is powered at 50,000 watts at all times, the only radio station on Puerto Rico with the maximum power day and night. But because 810 AM is a clear channel frequency, WKVM uses a directional antenna at all times to avoid interference.