1. Radar — 2023-10-08 00:18:51

   …f two receiving antennas located about 6 miles away from one of the BBC's shortwave broadcast antennas at **Daventry**. Signals travelling directly from the station were filtered out, and a Heyford bomber flown around the site (passive radar). {…

2. Vacuum Tube — 2023-09-23 15:57:19

   …re based around the concept of //thermionic emission//. Using two electrodes enables diodes to be made that can rectify signals. ::c:: == New Dawn == {{Image url="Flemingvalve.jpg" class="right" title="Flemings early valve" width="200" }} The vac…

3. Radio — 2023-09-23 15:56:24

   …" Birth_date="25/4/1874" death_date="20/7/1937" }} **Guglielmo Marconi** gave the first public transmission of wireless signals in England 1896. {{Toc}} The invention of communication by radio waves had a long history with many scientists contribu…
   …s of two and six Marconi was brought up by his mother in the English town of Bedford. In Italy he was able to transmit signals over a hill, a distance of approximately 1.5 miles. Finding little interest or appreciation for his work in Italy, Marc…
   …g" title="First radio transmission" class="right" width="200" }} Marconi gave his first public transmission of wireless signals at the now BT Centre in 1896. On {{Datetext event_date="13 May 1897", text="Marconi sent the world's first ever wirele…

4. MRI Scan — 2021-08-20 11:04:59

   …ging that led directly to Magnetic Resonance Imaging (MRI). == Faster processing == In 1973 Peter showed how the radio signals from MRI could be mathematically analysed, making possible their interpretation into useful images. He suggested gradie…
   …nts as a way to spatially localise NMR signals in a paper published in 1973. His method would speed up the process of producing images from an hour to a fraction of a…

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