{"id":5823,"date":"2021-04-14T08:47:23","date_gmt":"2021-04-14T07:47:23","guid":{"rendered":"https:\/\/blog.fh-kaernten.at\/ingmarsretro\/2021\/04\/14\/the-oscilloscope-picturetube\/"},"modified":"2021-04-14T09:01:28","modified_gmt":"2021-04-14T08:01:28","slug":"the-oscilloscope-picturetube","status":"publish","type":"post","link":"https:\/\/blog.fh-kaernten.at\/ingmarsretro\/2021\/04\/14\/the-oscilloscope-picturetube\/?lang=en","title":{"rendered":"The oscilloscope picturetube"},"content":{"rendered":"
<\/div>\n

<\/path><\/svg><\/i> \"Loading\"<\/p>\n

<\/div>\n

At the beginning of my blog, I talked about a small project with an oscilloscope tube. Since there are still pictures in the archive, I do not want to withhold it from the blog here:<\/p>\n\n\n\n\n
\"\"<\/a><\/td>\n<\/tr>\n
Cathode ray tube with high voltage generation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n


\n<\/p>\n

A cathode tube (Braun tube) consists of an evacuated glass bulb in which a hot cathode of tungsten wire is heated by an electric heating wire. The electrons emerge from the surface as a charge cloud (annealing emission). Between the positively charged anode and the hot cathode there is an electric field in which the electrons are accelerated. A pinhole allows the approaching electrons to pass only a bundle of determinable diameter, the actual electron beam. The electron beam can then be further accelerated.
\nThe Braun tube – as it is e.g. is present in a cathode ray oscilloscope – has two capacitor plates each to deflect the electron beam. (X and Y baffles). The tube is a Philips B7S 401 oscilloscope tube. For the sake of completeness, I list some technical data here:<\/div>\n
<\/div>\n
<\/div>\n