Editing Karl Ferdinand Braun (section)

===Braun Tube===
[[File:Braun cathode ray tube.jpg|220x220px|thumb|Braun's original cold-cathode CRT, the Braun tube, 1897]]
The enduring fame of Ferdinand Braun is largely due to his invention of the [[cathode-ray tube]], which is still commonly referred to as the "Braun tube." Today, the term typically refers to a high-vacuum tube in which an electron beam can be deflected in both horizontal and vertical directions. The first version, developed in Strasbourg in 1897, was far from perfect. It featured a cold cathode and a moderate vacuum, which required a 100,000 V acceleration voltage to produce a visible trace of the magnetically deflected beam. Furthermore, magnetic deflection affected only one direction, while the other was controlled by a rotating mirror placed in front of the phosphorescent screen. However, industry immediately recognized the potential of the invention, leading to its further development. By 1899, Braun's assistant [[Jonathan Zenneck]] introduced [[oscillations]] to magnetically control the Y deflection, and later improvements included the addition of a heated [[cathode]], a Wehnelt cylinder, and high-vacuum technology. This tube was not only used for oscilloscopes but also, for the first time in 1930 by [[Manfred von Ardenne]], became a fundamental component in the first fully electronic television transmission, as a picture tube for television sets, although Braun himself had considered it unsuitable for television.