WPTF

WPTF (680 AM) is a commercial radio station broadcasting a news/talk radio format. Licensed to Raleigh, North Carolina, the station serves the Research Triangle area. It is owned by the Curtis Media Group, with studios located on Highwoods Boulevard in Raleigh.

WPTF's transmitter site is a three-tower facility off East Chatham Street, near Maynard Road NE, in Cary, North Carolina. Along with WBT in Charlotte, it is one of two North Carolina AM stations which operates fulltime with 50,000 watts, the maximum power for AM stations in the U.S., although as a Class A clear-channel station, WBT has more protection from other stations than WPTF, which is classified as Class B. WPTF's daytime sugnal is non-directional from a single tower. It switches to a directional signal at night from two towers to avoid interference to other stations on 680 kHz. Its nighttime signal is primarily required to protect the dominant Class A station on 680 kHz, KNBR in San Francisco, and also must avoid interfering with several stations to the north on 680 kHz. Even with this restriction, at night WPTF can be heard across much of the Southeastern United States with a good radio.

WPTF is relayed by three FM translators: W225DF (92.9 MHz, Raleigh), W251CA (98.1 MHz, Rolesville) and W298DB (107.5 MHz, Smithfield).