FM broadcasting
VHF Radio waves do not travel far beyond the visual horizon, so reception distances for FM stations are usually limited to 30–40 miles (50–65 km) They can also be blocked by hills or buildings.
U.S. Naval Radio Station, Tarlac
The station comprised 1,937 acres. The core of its transmission capability was located in two transmitter buildings. The primary building, referred to as "Main Deck", housed a large number of high power, high frequency (HF) transmitters. It also housed microwave radio-relay equipment for reception and distribution of data received from the NavComStaPhil for subsequent short-wave radio transmission. The secondary transmitter building, referred to as "Bull Horn", housed a smaller number of transmitters, but with similar capabilities to those at Main Deck. Additionally, the Bull Horn site held the S-500 transmitter trailer. The S-500, known affectionately as "Big Sam", was a high power, low frequency (LF) transmitter dedicated for fleet broadcast, capable of generating 500 kW of broadcast signal power. Radio transmitters employed at both sites were in the category of high-power output, meaning, they generated radio signal powers in the range from a few kilowatts (kW) to several 10's of kW, but the majority of transmitters operated at either 10 kW or 40 kW. A large number and variety of LF and HF antennas were used at both transmitter sites. These included directional (beam antennas), omnidirectional antennas, and tall antenna towers for dedicated, wide-area broadcast capability.
An extensive infrastructure supported the station. This included a multi-purpose building with barracks, administration offices, mess hall, navy exchange, and recreation room; an enlisted men's club, autonomous power generating facility, water and sewer treatment facilities, helicopter pad, and security posts. Eventually, a swimming pool and tennis court were added.