Time signal radio stations

John Doyle is a professional announcer whose voice was most notably used by the National Institute of Standards and Technology on their radio clock WWV, a "time and temperature" voice for the Audichron Company. and others.

Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW). There is no official definition of the band range, but it always includes all of the high frequency band (HF), which extends from 3 to 30 MHz (approximately 100 to 10 metres in wavelength). It lies between the medium frequency band (MF) and the bottom of the VHF band.

WWV is a shortwave ("high frequency" or HF) radio station, located near Fort Collins, Colorado. It has broadcast a continuous time signal since 1945, and implements United States government frequency standards, with transmitters operating on 2.5, 5, 10, 15, 20, and 25 MHz. WWV is operated by the U.S. National Institute of Standards and Technology (NIST), under the oversight of its Time and Frequency Division, which is part of NIST's Physical Measurement Laboratory based in Gaithersburg, Maryland.

Norddeich Radio, DAN (former call signs KND, KAV, DAF) was the coast radio station for international communication to German ships. The station was built in 1907 in Norddeich, North-Germany. Radio communications were carried out with ships all over the world for around 90 years.

A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day.

BSF is the callsign of the time signal transmitter owned by the National Time and Frequency Standards Laboratory of the Ministry of Economic Affairs (Taiwan), which transmits time information on 77.5 kHz in the longwave range. It was launched on May 1, 1969 and is broadcast from Zhongli District in Taichung using a T-antenna located at 25°0′20″N 121°21′54″E / 25.00556°N 121.36500°E.

RTZ is the callsign of the time signal transmitted on 50 kHz with 10 kW from a large transmission centre near Irkutsk, Russia. It is controlled by All-Russian Scientific Research Institute for Physical-Engineering and Radiotechnical Metrology, operated by Russian Television and Radio Broadcasting Network, and situated at 52°26′10″N 103°41′09″E / 52.43611°N 103.68583°E. The transmitter is active 23 hours per day, from 22:00 to 21:00 UTC, except for the 3rd and 4th Monday of each month between 00:00 and 08:00 UTC, when it is switched off for maintenance. The station sends time signal similar to RBU.

​JN53dv is the Maidenhead grid square of an experimental shortwave time signal station in Italy. It is located in the town of Corsanico-Bargecchia near Massarosa and operated by Italcable

BPL is the call sign of the official long-wave time signal service of the People's Republic of China, operated by the Chinese Academy of Sciences, broadcasting on 100 kHz from CAS's National Time Service Center in Pucheng County, Shaanxi at 34°56′54″N 109°32′34″E / 34.94833°N 109.54278°E, roughly 70 km northeast of Lintong, along with NTSC's short-wave time signal BPM on 2.5, 5.0, 10.0, and 15.0 MHz.

RBU is a time signal radio station located in Moscow (56°44′00″N 37°39′48″E / 56.73333°N 37.66333°E). It transmits a continuous 10 kW time code on 66⅔ kHz. This is commonly written as 66.66 or 66.666 kHz, but is actually 200/3 kHz. Until 2008, the transmitter site was near Kupavna 55°44′04″N 38°9′0″E / 55.73444°N 38.15000°E and used as antenna three T-antennas spun between three 150 metres tall grounded masts. In 2008, it has been transferred to the Taldom transmitter at 56°44′00″N 37°39′48″E / 56.73333°N 37.66333°E.