WRTI
| Broadcast area | Delaware Valley | 
|---|---|
| Frequency | 90.1 MHz (HD Radio) | 
| Branding | WRTI 90.1 | 
| Programming | |
| Format | Classical (days) Jazz (nights) | 
| Subchannels | HD2: Jazz - Classical | 
| Affiliations | National Public Radio Public Radio Exchange American Public Media | 
| Ownership | |
| Owner | 
 | 
| History | |
| First air date | July 9, 1953 (originally carrier current 1948-53) | 
| Call sign meaning | Radio Technical Institute | 
| Technical information | |
| Licensing authority | FCC | 
| Facility ID | 65190 | 
| Class | B | 
| ERP | 7,700 watts | 
| HAAT | 371 meters (1,217 ft) | 
| Transmitter coordinates | 40°2′30″N 75°14′10.1″W / 40.04167°N 75.236139°W | 
| Translator(s) | See § Translators | 
| Repeater(s) | See § Simulcasts | 
| Links | |
| Public license information  | |
| Webcast | Listen Live | 
| Website | www | 
WRTI (90.1 FM) is a non-commercial, listener-supported radio station in Philadelphia, Pennsylvania. It is a service of Temple University, with the university's board of trustees holding the station's license. The studios are on Cecil B. Moore Avenue in Philadelphia. WRTI plays classical music from 6 a.m. to 6 p.m. and jazz all night. It broadcasts using HD Radio technology, using its digital subchannel to reverse this schedule. On WRTI-HD2, jazz is heard by day, classical music at night. News updates are provided by National Public Radio. The station holds periodic fundraisers on the air and on line.
WRTI is a Class B station. It has an effective radiated power (ERP) of 7,700 watts. The transmitter is in the Roxborough section of Philadelphia at (40°2′30.1″N 75°14′10.1″W / 40.041694°N 75.236139°W). Its tower is shared with several Philadelphia-area FM and TV stations. WRTI programming is also heard on a network of repeater stations in Pennsylvania, New Jersey and Delaware.