Before they were decommissioned between 1982 and 1985, there were many instances of 405-line transmitters in the United Kingdom, having first been used in 1936. Below is a list of all transmitters:
The 405-line transmitter network of the United Kingdomedit
Alexandra Palace in London hosted the first 405-line transmitter, active between 1936 and 1939, then again from 1946 through to 1956. From 1949 onwards, the Band IVHF 405-line BBC transmitter network grew quickly.
In 1955, with the advent of ITV a parallel effort to provide a Band III network was also underway. The pre-1955 BBC stations used the five channels of Band I, but with the introduction of Band III, some BBC stations started appearing there too (most of them on channels 12 or 13). All ITV transmitters were in Band III (mostly on channels 8, 9, or 10).
There were eventually 41 high-power "main stations" owned by either the BBC or the IBA (see below). Most were built during the 1950s. The BBC's last main station to enter service was Belmont in Lincolnshire in November 1966; the IBA's last main station was the Welsh service from St. Hilary which went on-air in February 1965.
The main stations were supported by a large number of off-air relay stations to fill awkward gaps in the service from the main stations. The last of these (Llanelli in south Wales (BBC) and Newhaven in southeast England (IBA)) had been built by late 1970.
The entire system was decommissioned between 1982 and January 1985.
Transmitters by regionedit
Englandedit
Channel Islandsedit
Eastedit
London and South Eastedit
Midlandsedit
Northedit
Northeastedit
Northwestedit
Southedit
Southwestedit
Westedit
Northern Irelandedit
Scotlandedit
Walesedit
Referencesedit
External linksedit
MB21's page on BBC 405 TV
MB21's page on ITV 405 TV
405 Alive's list of transmitters"
January 01, 1970
line, transmitters, united, kingdom, this, article, does, cite, sources, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, september, 20. This article does not cite any sources Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources 405 line transmitters of the United Kingdom news newspapers books scholar JSTOR September 2023 Learn how and when to remove this message Before they were decommissioned between 1982 and 1985 there were many instances of 405 line transmitters in the United Kingdom having first been used in 1936 Below is a list of all transmitters Contents 1 The 405 line transmitter network of the United Kingdom 2 Transmitters by region 2 1 England 2 1 1 Channel Islands 2 1 2 East 2 1 3 London and South East 2 1 4 Midlands 2 1 5 North 2 1 6 Northeast 2 1 7 Northwest 2 1 8 South 2 1 9 Southwest 2 1 10 West 2 2 Northern Ireland 2 3 Scotland 2 4 Wales 3 References 4 External linksThe 405 line transmitter network of the United Kingdom editAlexandra Palace in London hosted the first 405 line transmitter active between 1936 and 1939 then again from 1946 through to 1956 From 1949 onwards the Band I VHF 405 line BBC transmitter network grew quickly Channel Vision Carrier Frequency B1 45 00 MHz B2 51 75 MHz B3 56 75 MHz B4 61 75 MHz B5 66 75 MHz In 1955 with the advent of ITV a parallel effort to provide a Band III network was also underway The pre 1955 BBC stations used the five channels of Band I but with the introduction of Band III some BBC stations started appearing there too most of them on channels 12 or 13 All ITV transmitters were in Band III mostly on channels 8 9 or 10 Channel Vision Carrier Frequency B6 179 75 MHz B7 184 75 MHz B8 189 75 MHz B9 194 75 MHz B10 199 75 MHz B11 204 75 MHz B12 209 75 MHz B13 214 75 MHz There were eventually 41 high power main stations owned by either the BBC or the IBA see below Most were built during the 1950s The BBC s last main station to enter service was Belmont in Lincolnshire in November 1966 the IBA s last main station was the Welsh service from St Hilary which went on air in February 1965 The main stations were supported by a large number of off air relay stations to fill awkward gaps in the service from the main stations The last of these Llanelli in south Wales BBC and Newhaven in southeast England IBA had been built by late 1970 The entire system was decommissioned between 1982 and January 1985 Transmitters by region editEngland edit Channel Islands edit East edit London and South East edit Midlands edit North edit Northeast edit Northwest edit South edit Southwest edit West edit Northern Ireland edit Scotland edit Wales editReferences editExternal links editMB21 s page on BBC 405 TV MB21 s page on ITV 405 TV 405 Alive s list of transmitters More details on 405 line BBC transmitters Retrieved from https en wikipedia org w index php title 405 line transmitters of the United Kingdom amp oldid 1222375714, wikipedia, wiki, book, books, library,
