A thyratron is a type of gas-filled tube used as a high-power electrical switch and controlled rectifier. Thyratrons can handle much greater currents than similar hard-vacuum tubes. Electron multiplication occurs when the gas becomes ionized, producing a phenomenon known as Townsend discharge. Gases used include mercury vapor, xenon, neon, and (in special high-voltage applications or applications requiring very short switching times) hydrogen. Unlike a vacuum tube (valve), a thyratron cannot be used to amplify signals linearly. In the 1920s, thyratrons were derived from early vacuum tubes such as the UV-200, which contained a small amount of argon gas to increase its sensitivity as a radio signal detector, and the German LRS relay tube, which also contained argon gas. Gas rectifiers, which predated vacuum tubes, such as the argon-filled General Electric "Tungar bulb" and the Cooper-Hewitt mercury-pool rectifier, also provided an influence. Irving Langmuir and G. S. Meikle of GE are usually cited as the first investigators to study controlled rectification in gas tubes, about 1914. The first commercial thyratrons appeared circa 1928. The term "thyratron" is derived from Ancient Greek "θύρα" ("thyra"), meaning "door" or "valve". The term "thyristor" was further derived from a combination of "thyratron" and "transistor". Since the 1960s thyristors have replaced thyratrons in most low- and medium-power applications. (Wikipedia).
Everything Matters | Boron | Paul Stepahin | Exploratorium
Join Paul Stepahin for a presentation about quantum mechanics and the elements.Boron is complicated. Elusive. Tough. Created in collisions between cosmic rays and interstellar dust, pure boron may be found in meteoroids, but not naturally on Earth. And yet this relatively uncommon element
From playlist Tales from the Periodic Table
In a Minute: Vacuum Tube Thyratrons in 60 Seconds
For when you need to learn about thyratrons but you’re running short on time! However, if you have time, check the full length version here: https://youtu.be/DuAzRbt_lyo Thanks for watching! Discord: https://discord.gg/p7UsfHD Reddit: https://www.reddit.com/r/usagielectric/ Twitter:
From playlist In a Minute
What Are Allotropes of Metalloids and Metals | Properties of Matter | Chemistry | FuseSchool
What Are Allotropes of Metalloids and Metals Learn the basics about allotropes of metalloids and metals, as a part of the overall properties of matter topic. An allotrope is basically a different form of the same element, each with distinct physical and chemical properties. For example
From playlist CHEMISTRY
Boron Tribromide - Periodic Table of Videos
Debbie, our self-confessed Boron lover, demonstrates the fuming of Boron Tribromide. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: http://bit.ly/118elements More at http://www.periodicvideos.com/
From playlist Molecular Videos - Periodic Videos
Teletype Model 19 Part 4: Thyratron Power Supply
We attempt to turn on the REC-30 high voltage power supply. They call it a rectifier actually, not a power supply. It's supposed to deliver up to 0.6A at 200V. The monstrous vintage 1930 design uses beautiful giant Thyratron tubes . Will it glow or will it blow? See Ken Shirriff's in-depth
From playlist Teletype Model 19 Restoration
Rare Film: Vintage 1975-1978 Soviet Bloc Mainframe Computers (Russian with English narration)
Rare Film: Part of a research project depicting numerous mainframe computer systems used in the former Soviet Bloc, circa 1975-1978. Russian film with English narration. Fascinating film. At least 8 different computer systems are shown, although not specifically identified by narrator;
From playlist Russian, Soviet Computer History Films
1968 HOW VACUUM TUBES are Made: English Electric Valve Co EEV Television Radio Radar CRT Cameras
The following film focuses on the English Electric Valve Company, EEV, produced this 1968 documentary on how vacuum tubes ("valves" in the UK) are created and used. Shows manufacturing of Magnatrons, Klystrons, Image Orthicon (tv camera), cathode ray tubes, thyratrons, rectifiers and othe
From playlist Early Vacuum Tube Computers - 1940's and 1950's.
Do you know that a semiconductor device called a ‘thyristor’ solves the huge issue of power transfer from a generating station to consumers located far away? Traditional AC power transmissions face huge power losses and also suffer from the issue of stability and controllability. For long
From playlist Electronics & Electrical
Vacuum Tube Computer P.15 – Building a Soft Start to Battle In-rush Current
In this episode we finally tackle our in-rush current problem. There’s a couple ways that we could have gone about it, but I happened to have some old automotive relays and some thyratrons hanging about, so that’s what we used! The end result, I think, is pretty awesome! If you want to su
From playlist Vacuum Tube Computer
Everything Matters | Boron | Ron Hipschman | Exploratorium
Boron is complicated. Elusive. Tough. Created in collisions between cosmic rays and interstellar dust, pure boron may be found in meteoroids, but not naturally on Earth. And yet this relatively uncommon element is essential for plant growth, and readily appears in compounds such as borax,
From playlist Tales from the Periodic Table
Adam Savage's Vacuum Tube Collection Gets CT Scanned!
Learn more about how these object were scanned: https://www.lumafield.com/article/ct-scans-vacuum-tubes-tested-adam-savage Among the objects Adam collects are pieces of vintage electronics; artifacts like vacuum tubes and other analog devices that predate solid state devices are tangible
From playlist Inside Adam's Cave
What Are Allotropes? Non-Metals | Properties of Matter | Chemistry | FuseSchool
In this video we will looks at what allotropes are, and different examples of them. The term allotrope refers to different forms of the same element. Diamond and graphite are made of only carbon atoms – yet they exhibit very different physical and chemical properties. These differences ar
From playlist CHEMISTRY
Iodine (version 1) - Periodic Table of Videos
Iodine is a solid which turns to a purple vapour when heated. It is number 53 on the periodic table. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: http://bit.ly/118elements More at http://www.per
From playlist With Portuguese subtitles (Português) - Periodic Videos
Why we don't always replace vintage electrolytic capacitors
Judging from the comments on my last video, there is much misconception about if and when to replace vintage electrolytic capacitors. This video explain why, contrary to widespread internet lore, we don't feel compelled to replace all of our vintage electrolytic caps. Caveat emptor: althou
From playlist Teletype Model 19 Restoration
A quick definition of the halogens. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://www.p
From playlist Chemistry glossary
High Energy Dye Laser Test Fire
A flash lamp pumped dye laser with over 50 joules of highly collimated, 580nm light is described and demonstrated. Damaged lens at 13:38 will be shown with better lighting in the next video.
From playlist Lasers
Apollo Comms Part 16: Stanford Dish Apollo Past
We are treated to a very special tour of the nearby Stanford dish, and find evidence of its participation to the Apollo program. Many thanks to viewer Steve Muther and SRI International. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC
From playlist Space Hardware
Making 1,2-dibromo-1-phenylethane (dibromostyrene)
Here we are making 1,2-dibromo-1-phenylethane which is also known as dibromostyrene. It is a useful chemical which we are going to use in a future video. Patreon: https://www.patreon.com/thyzoid Discord: https://discord.gg/UrjAt44HWH (Let me know if the discord link does not work) Instagr
From playlist Organic Chemistry
Playing with Neons (NE2 and MTX90)
This is an episode I’ve been wanting to do for a while, because I absolutely love neons! Sure they’re gorgeous to look at and a modern LED can only dream of putting out such a good looking glow, but they’re also have some incredibly unique characteristics that we can exploit to build some
From playlist Vacuum Tube Logic