Athens ERA-1 Transmitter is a transmission tower in Agios Stefanos, Attica, Greece.
Agios Stefanos is a suburb in Athens, Greece. Since the 2011 local government reform it is part of the municipality Dionysos, of which it is the seat and a municipal unit. The municipal unit has an area of 8.136 km2.
Greece, officially the Hellenic Republic, historically also known as Hellas, is a country located in Southern and Southeast Europe, with a population of approximately 11 million as of 2016. Athens is the nation's capital and largest city, followed by Thessaloniki.
The facility broadcasts the program of ERA-1 on 729 kHz with 150 kW in the standard mediumwave band. Athens ERA-1 transmitter uses as antenna a 210 metres tall mast radiator insulated against ground, which is a lattice structure with triangular cross section.
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz, using channels spaced every 9 kHz, and in North America an extended MW broadcast band ranges from 525 kHz to 1705 kHz, using 10 kHz spaced channels. The term is a historic one, dating from the early 20th century, when the radio spectrum was divided on the basis of the wavelength of the waves into long wave (LW), medium wave, and short wave (SW) radio bands.
In radio engineering, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves. In reception, an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver to be amplified. Antennas are essential components of all radio equipment.
Radio masts and towers are, typically, tall structures designed to support antennas for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest human-made structures. Masts are often named after the broadcasting organizations that originally built them or currently use them.
Coordinates: 38°9′0″N23°51′37″E / 38.15000°N 23.86028°E
A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.
