Greenwich Time Signal 19:00. By 19:45 the same day the power supply was repaired and the 20:00 pips were broadcast as normal. Many radio broadcasters around the world use the Greenwich Time Signal as a means to mark the start of the hour. The pips are used in both domestic and international commercial and public broadcasting. Many radio stations use six tones similar to those used by the BBC World Service; some shorten it to five, four, or three tones. Greenwich Time Signal The Greenwich Time Signal (GTS), popularly known as the pips, is a series of six short tones broadcast at one-second
BBC Radio 4 September 1967, when the BBC renamed many of its domestic radio stations, in response to the challenge of offshore radio. It moved to long wave in November 1978, taking over the 200 kHz frequency (1500 meters) previously held by Radio 2, and later moved to 198 kHz as a result of international agreements aimed at avoiding interference (all UK AM/MW/LW frequencies are divisible by 9) and to mark the station becoming a fully national service for the first time the station officially became known as Radio 4 UK, a title that remained until mid 1984. For a time during the