21 July 1955 - The BBC brings into service its Divis transmitter, its first permanent 405-line VHF Band I facility serving Northern Ireland, marking the launch of a television service for Northern Ireland; the 35 kW transmissions can also be readily received in much of the Republic of Ireland.
July 21 - The BBC brings into service its Divis transmitter, its first permanent facility serving Northern Ireland, marking the launch of a television service for Northern Ireland; the 35 kW transmissions can also be readily received in much of the Republic of Ireland.
Divis | Prokop Diviš |
His doctoral students include Horst-Günter Zimmer, Wulf-Dieter Geyer, Bohuslav Divis, Gerhard Frey, Volker Weispfenning, Henning Stichtenoth, Rainer Weiss Auer, Florian Pop and Franz Lemmermeyer.
The news of the death of Georg Wilhelm Richmann, a professor in St. Petersburg, who was killed by lightning in 1753 during his attempt at measuring the intensity of the electric field in the atmosphere, caused Diviš to become interested in atmospheric electricity, and to the decision to construct a "weather-machine" at Přímětice.
•
Benjamin Franklin had invented the lightning rod in 1752 in the United States, but it did not work well, because it was not grounded, while Diviš's apparatus in 1754 was.
Other sites that required major engineering work before Digital Switchover were Divis (Northern Ireland) and Sandy Heath, (Bedfordshire), which also required mechanical strengthening work.