Talk:Walkie-talkie
From Wikipedia, the free encyclopedia
Was walkie-talkie really originally developed by Henryk Magnuski, Polish engineer? I have urge to put that into article...
See this page http://sitka.triumf.ca/morgan/dlhings/walkietalkie.html which credits a lot of other people. User:Rjstott
- According to my sources Magnuski was the main constructor of the SCR-300. However, the company's name was not yet Motorola at the time. The difference between those constructions mentioned on the abovementioned page and SCR-300 is that Magnuskis walkie-talkie was a hand-held radio, not a huge box carried by a radio operator. You can see the pic of his invention here. Halibutt 02:51, Jul 8, 2004 (UTC)
For the record, the SCR-536 was the "Handie-Talkie" and Don Mitchell, Chief Engineer of Galvin Manufacturing Company is credited with driving that development effort. He received a special citation from the Army for this work. Henry Magnuski's contribution towards the development of the SCR-300 "Walkie-Talkie", a 35 pound backpack radio, is documented quite well via two sources, cited below:
The Founder's Touch by Harry Mark Petrakis, 1965, McGraw-Hill, NY, p. 144-147
Chapter 13 - The Talkies - Handie and Walkie
Noble joined the company in early September 1940. He began by working on the possibility of adapting many of the AM systems common in that time to FM. He had no responsibility in the development of the "Handie-Talkie" radio but went to Fort Monmouth, New Jersey, with Don Mitchell to make the presentation of the unit to the Signal Corps. Among the Signal Corps officers present at that time were two, Col. Colton , and Major J.D. O'Connell, who would play important roles in the development of a longer range portable unit than the "Handie-Talkie" radio.
Sometime after the United States had gone to war, on a visit to Washington, Noble was told by Col. O'Connell that the Signal Corps had let a contract for the development of a new AM portable transmitter-receiver. Noble told him bluntly that he felt this was a grave mistake, and that the area of development should be for an FM portable unit. Noble felt strongly such a unit could be developed and that Motorola could do it. As a result of this conversation, and Noble's confidence in the company's ability to meet the challenge, Col. O'Connell issued a Signal Corps contract for the development of an FM portable transmitter-receiver to Motorola.
A series of meetings were held with Signal Corps Engineers at Fort Monmouth, and engineering meetings at Motorola were attended by Noble's team which included Henry Magnuski, Marion Bond, Lloyd Morris, and Bill Vogel. Working furiously against time, this brilliant team developed a design which included a single tuning control to tune both the transmitter and the receiver simultaneously and an automatic frequency control to insure clear communication without the need for critical precision tuning on the part of the operator. They also overcame the primary problems of establishing an adequate power supply, a minimum number of crystals, and the fungiciding of the unit to allow it to withstand tropical temperatures and humidity.
The final critical acceptance test took place at Fort Knox, Kentucky, where Col. O'Connell had set up a conference for the testing of a variety of portable and mobile communications equipment. Members of the Infantry Board, always highly critical of the application of communications equipment to battlefield conditions, had been invited as observers. Bob Galvin accompanied Dan Noble and Bill Vogel to Fort Knox for these crucial tests. Since they only had two working models, each night was spent in the hotel checking them over carefully to make sure they were ready for additional tests the following day. The performance of the SCR-300, Walkie-Talkie, during those tests, its capacity to communicate through interfering ignition noise, and the rugged quality of the design, met with unusually enthusiastic response from the hard-headed Infantry and Signal Corps officers.
Motorola was to produce nearly 50,000 of these famed SCR-300 Walkie-Talkie units during the course of the war, the first units transported by air for use in the invasion of Italy by the Allied Forces. A sizeable quantity went to the Pacific. Perhaps their greatest contribution was in the European invasion, where their role in re-establishing order at the conclusion of the Battle of the Bulge gained Motorola tremendous recognition and a general feeling that perhaps the Walkie-Talkie was the single most useful piece of communications equipment employed in the invasion.
Noble was awarded a Certificate of Merit from the Army for his part in the development of the Walkie-Talkie. Noble, accepting the award, stressed the major contributions of Magnuski, Vogel, Morris and Bond. He went on to say that the development of the Walkie-Talkie was an academic exercise compared to the contribution of the men on the battlefields, the men fighting the war.
A Personal Journal: 50 Years at Motorola by Andy Affrunti Sr. Privately published manuscript, 1985
P. 63-64
Soon after I started in the research lab in late 1940, Henry Magnuski and I received our first assignmment based on a military contract: a portable FM communications radio. It was a typical Monday morning when Dan Noble approached Henry and me and asked both of us to sit at my workbench. Dan motioned Henry to sit at his right and me at his left and placed an official looking sheet of paper on the bench. I noticed the fancy heading that read, United States Army Signal Corps. Dan read the eight paragraphed items aloud and finished by saying, "Henry and Andy, I want you to start working on this immediately. During my visit to the Signal Corps last week they placed a life-and-death priority on this program for the infantry. You will get whatever assistance you need and I expect to see a prototype fabricated as soon as possible."
Shocked by the demand he placed on us, we read and reread this one sheet of paper several times. The Signal Corps designated this communications equipment as a portable infantry battalion transceiver nomenclatured SCR-300. We soon realized that this was a specification document to design and develop a portable, frequecy modulated radio receiver and transmitter powered by batteries. The complete equipment should not weigh over 35 pounds and be carried on the back of an infantry combat soldier. It should provide solid communications over a distance of three miles and be water-proofed against rain. No more than two crystals could be used and it should cover a frequency range continouously variable from 40.0 to 48.0 megacycles providing 48 channels of communications.
p. 73-74
We tested and retested our prototype in the lab and finally just a few days before the Signal Corps representatives came, Henry and I were ready. We stood eight miles apart - more than twice the specification - on a bright spring day in 1941, he standing on the flat roof of the Tropic-aire building next to the Augusta Boulevard plant, I in the Thatcher Woods Forest Preserve parking lot to the west of the plant. Marconi or Bell couldn't have felt better when they heard others on radio or telephone than I did when I heard Henry's Polish-accented voice from Augusta Boulevard: "Ondy, do you hear me?"
"Yes, Henry," I said from my forest preserve station, "I hear you very good, loud and clear."
When we reported to Dan Noble and our lab associates the successful result of our test, everyone was jubilant. Our prototypes housed in the two green wooden boxes took on an aire of great importance. A week later in the same location the field test was repeated for Signal Corps officials who gave us a quick verbal approval to develop a production prototype.
So it would appear that proper credit for the SCR-300 goes to Dan Noble for conceiving an FM portable unit, and the team of Magnuski, Bond, Morris and Vogel for the actual implementation and production. The FM circuit design and development appears to be the work of Magnuski as the principal RF engineer. --hankm 23:25, 9 July 2005 (UTC)
[edit] what year was the walkie talkie made
i dont no u tell me
[edit] change
Hi class hope you enjoy my report
[edit] Choosing a walkie talkie
This link in the article is pretty useless. The information isn't specific to walkie talkies - looks like a generic article with walkie-talkie thown in lots of times. Link spam? Anyone got any better sources? Pgr94 19:36, 25 October 2006 (UTC)
- Yeah, it's linkspam alright. This kind of link has been added to about 30 other articles. Graham87 15:37, 11 November 2006 (UTC)
tndsrys;lunfielfj efn wsfmnwrwj4eps97jrta
