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TV AERIAL PLUG
The Belling-Lee connector or IEC 169-2 connector, more often simply known as the TV aerial plug, is the traditional European antenna connector for TV sets and FM-radio receivers. It is the oldest coaxial RF connector still commonly used today. It connects a receiver to a terrestrial VHF/UHF roof antenna, antenna amplifier, or CATV network, via a coaxial cable.
It was invented at Belling & Lee Ltd in Enfield, England, around 1922, at the time of the first BBC broadcasts. It was originally only intended for medium frequency broadcasts, where accurate impedance matching of an antenna connector is not a concern.
Unlike the F connector used today for the same purpose in North America, the IEC 169-2 connector is not matched to the 75-ohm impedance of the antenna cable used, thereby causing signal reflection. In spite of being unsuitable for modern VHF and UHF TV frequencies, due to industrial inertia, the Belling-Lee connector is still used today for TV signals. However, it is recognized as a source of signal distortion and has become a particular concern with digital signals.
It is not used in Europe to connect satellite TV antennas, where it has been dropped in favour of the 75-ohm F connector.
There is also a Miniature Belling Lee connector which was used for internal connections inside some equipment. It looks identical to a TV Aerial Plug / IEC169-2 but is obviously smaller.
References
- International Standard IEC 60169-2: Coaxial unmatched connector.
External links
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