Greenwich Time Signal Greenwich Time Signal The Greenwich Time Signal (GTS), popularly known as the pips, is a series of six short tones broadcast at one-second intervals by many BBC Radio stations. The pips were introduced in 1924 and have been generated by the BBC since 1990 to mark the precise start of each hour. Their utility in calibration is diminishing as digital broadcasting entails time lags. There are six pips (short beeps) in total, which occur on each of the 5 seconds leading up to the hour and on the hour itself. Each pip is a 1 kHz tone (about halfway between
BBC Radio Wales per week, and relaying Radios 2 and 4 at other times. However the groundwork had been laid for the stations to become important, respected full-time services. Radio Wales now broadcasts for 20 hours a day with a simulcast of the BBC World Service after closedown every night. BBC Radio Wales was preceded in the autumn of 1978 by four experimental local radio stations broadcasting for a single week: Radio Wrexham, Radio Deeside, Radio Merthyr and Radio Rhondda. They were broadcast using an RTÉ Outside Broadcast transmitter. The first editor of BBC Radio Wales was Teleri Bevan, a former BBC Radio