Still excellent for SW, but not so much so for VHF or UHF...

http://en.wikipedia.org/wiki/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.

== History ==
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.

== Belling-Lee vs other connectors ==
Unlike the coaxial 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. The lack of impedence matching causes signal
reflections in the cable, leading to noticeable signal distortion on VHF and
UHF frequencies (but not MW or Shortwave).

The IEC-169-2 connector is recognized as a source of signal distortion and
has become a particular concern with digital signal reception, specificially
UHF HDTV.

DAB (digital radio) and other reception modes are not as severely affected
by the impedence matching issue, so only HDTV and satelite reception systems
are forced to use the F connector.

In spite of being somewhat unsuitable for modern analog VHF and UHF TV
frequencies, due to industrial inertia, the Belling-Lee connector is still
used today as a TV signal reception connector. In Europe and the Americas
this connector is not used to connect satellite TV antennas. The more
electrically suitable 75-ohm F connector is standard.

== Variations ==
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.