Radar History: Rad Lab and Schenectady Work
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- Опубліковано 7 жов 2024
- Pushing the limits of radio Rudy Dehn and Bob Mayer tell us about the work on World War 2 era radar at MIT and General Electric at Schenectady, NY. He describes the development and production of magnetrons. They achieved higher and higher frequencies and played with pulse technology, allowing for better resolution. On rooftops of MIT and the GE plant they tested systems during an exciting time in radio history. This is part of our Oral History program.
- Наука та технологія
Had an advisor in my BSEE program who had worked at the MIT Rad Lab. He helped develop the antenna design for proximity fuses. He had a cutaway one in his office.
One other problem is the complexity of the cavity magnetron. Before the Tizard Mission, they were making them via machining since each cavity had to be made with precision. This was slow and made them expensive and few and far in between. GE and Rayethon got together and said "why not try mass production methods?". So they came up with the trick of making magnetrons by cookie-cutting sheet metal and creating the magnetrons like you would build a sandwich, or an electric motor. This solved the precision issue since each piece came from the same press, eliminating quality control and variances machining at the time created. In the end, this sped up production immensely and the costs dropped like a rock from thousands of dollars for a SCR-584 magnetron, to mere pennies on the dollars for each unit. They enabled the mass production to build thousands of "eyes in the vans" that enabled allied forces to deal with threats.
Thanks for documenting this. These guys are truly fascinating.
British ,Henry Forshaw was the brains working for British Telecommunications, as pioneer,and one of the team development of the magnetron, The British forwarded the know how over,and Henry received Due thanks from Eisenhower.
Magnetrons used in cooking ovens operate at 2.4 GHz, not 24. GHz. Ron W4BIN
The thumbnail got me 😍😍😂
cute guy
re: "some guy" who started the US radar: citing en.wikipedia.org/wiki/Vannevar_Bush
On August 31, 1940, Bush met with Henry Tizard, and arranged a series of meetings between the NDRC and the Tizard Mission, a British scientific delegation. At a meeting On September 19, 1940, the Americans described Loomis and Compton's microwave research. They had an experimental 10 cm wavelength short wave radar, but admitted that it did not have enough power and that they were at a dead end. Taffy Bowen and John Cockcroft of the Tizard Mission then produced a cavity magnetron, a device more advanced than anything the Americans had seen, with a power output of around 10 KW at 10 cm,[40] enough to spot the periscope of a surfaced submarine at night from an aircraft. To exploit the invention, Bush decided to create a special laboratory. The NDRC allocated the new laboratory a budget of $455,000 for its first year. Loomis suggested that the lab should be run by the Carnegie Institution, but Bush convinced him that it would best be run by MIT. The Radiation Laboratory, as it came to be known, tested its airborne radar from an Army B-18 on March 27, 1941. By mid-1941, it had developed SCR-584 radar, a mobile radar fire control system for antiaircraft guns.[41]
Microwave ovens use 2.4GHz
Do you want a cookie? He's like 90 years old. I read around it.
Hint: You should too instead of pointing out pointless mistakes by the man who developed the magnatron radar system.
Blow me, bitch.
WiFi also use 2.4GHz, and I heard there's a company that offer supermarkets ways to count numbers of shoppers, on daily basis by interpreting WiFi signal like echolocation.
Not all of them. Large ones used in industrial microwave processing typically use 915 megahertz, as did early household ones.
Muonium's comment is valuable and proper. Feedback on accounts like this one which correct small mistakes increase the value of the account. It is standard practice in print publications which cover history and technology to include a section in each issue to publish reader feedback which points out and corrects errors in prior issues. This process greatly improves the quality and the value of the material presented. The process for UA-cam videos is not formalized, but Comments and Replies are the main tools available. // Note that articles published in magazines and journals generally have the benefit of polishing by editors and at least some qualified pre-pub review. A guy talking off the cuff doesn't have that benefit. I'm sure that the 90 year old recounting his memoirs would want errors to be pointed out and corrected. He'd hate to add noise to the historical record. // By the way, microwave ovens for home and restaurant use operate at frequencies of about 2.45 GHz.
I need to go back to high shool an get my degree in magnatrons to understand this story.
10:23 counting canoes
What a rambling old mess. I waited in vain to hear Randall and Boot mentioned and their invention of the cavity magnetron and its delivery to the USA. "The most valuable cargo ever brought to our (US) shores".
The story's such a deformity of reality, one might just as well consider it a myth.