What is a magnetic detector?

Magnetic detector, also known as "Maggie" or "Marconi Magnetic Detector", was a short -term innovation in radio communication, which was mostly used for transatlantic communication in a short period of time in the early twentieth century. In 1902 she was improved by Marconi and did a better job than Koherer when increasing the detectable radio signals on long rates. Soon it was replaced by crystal receivers and more advanced more developmental vacuum tubes.

Especially popular in naval applications due to its reliability, a magnetic detector has only been used for only ten years, especially European vessels. The first "Maggie" is said to have been installed in 1903 in Carlo Alberto, the Italian Navy War. More reliable and sensitive than any of its predecessors Maggie quickly became popular and soon enjoyed a commercial success that lasted roughly from its invention in 1902 until it was stopped in 1914.Detector ETIC BYL considered the main progress in radio technology and has become a standard radio detector on most boat boards that were used during this time, including war vessels. It was also used in many cases as a backup. It was more developed than other earlier magnetic detectors, because it was driven by a clock engine and stationary coils, unlike having only a rotating magnet above the immobile iron belt.

One of the technical innovation of the Marconi magnetic detector was the seemingly endless iron belt, which consisted of 70 strands of iron wire, which were covered with a layer of silk. This group would pass by two rotating pulleys that were rotated by a watch -style engine; Then the belt would pass through the glass tube in which there was a copper coil that functioned as a frequency coil for the sound sensor.

Two permanent horseshoes were respondents for magnetIzation of long iron as it moved through a glass tube. The use of continuous reverse magnetism, which caused a weak DC current in the coil, could be measured variation or flow, allowing the translation to the sound. The device was connected to a telephone receiver that converted fluctuations to sound.

considered a rare antique and collector's item, the Marconi magnetic detector is sought and searched for by radio collectors around the world who wonders at its elegant antique technology. It is considered to be a valuable radio artifact and older models are sometimes carefully renewed, which may include cleaning and oiling of old parts, as well as replacement of key wire connections that are sometimes broken, or easily broken wire loop that surrounds the coils.