Download Crystal Clear: The Struggle for Reliable Communications by Richard J. Thompson Jr. PDF

By Richard J. Thompson Jr.

Quartz crystal-a expertise that modified the tide of global battle II

the various defining leaps in expertise within the 20th century happened in the course of the moment international warfare, from radar to nuclear power. usually ignored of ancient discussions are quartz crystals, which proved to be simply as pivotal to the Allied victory-and to post-war development-as different applied sciences. Quartz crystals supplied the U.S. army, for the 1st time, with trustworthy communique at the entrance strains, after which went directly to develop into the center of a few of the main uncomplicated units of the post-war period, from watches, clocks, and colour televisions, to mobile phones and pcs.

In Crystal Clear, Richard Thompson relates the tale of the quartz crystal in international conflict II, from its early days as a interest for newbie radio fanatics, to its use by way of the USA military. It follows the intrepid crew of scientists and engineers from the workplace of the manager sign Officer of the U.S. military as they raced to create a good quartz crystal unit. they'd to discover a competent provide of radio-quality quartz; devise ways to achieve, mine, and shipping the quartz; be able to fabricate quartz crystal oscillators quickly; after which clear up the confusing "aging challenge" that plagued the early devices. eventually, the improvement of quartz oscillators turned the second one biggest clinical venture in global conflict II after the long island venture.

Bringing to gentle a little-known element of global battle II, Crystal Clear deals a glimpse within probably the most major efforts within the annals of engineering.Content:
Chapter 1 From twine to instant: The Development—and Acceptance—of Tactical Radio (pages 5–15):
Chapter 2 Crystal Control—The nice Gamble (pages 17–29):
Chapter three The sign Corps Lays the root (pages 31–54):
Chapter four not anything Else to Do yet Grind Crystals (pages 55–68):
Chapter five using the “Flat Wheel Limited”—Overseeing a Mass construction (pages 69–91):
Chapter 6 delivering a Mass creation Industry—The Civilian executive Steps In (pages 93–115):
Chapter 7 “The entire Radio Crystal application of the Armed companies relies on the good fortune of the Procurement software in Brazil. not anything needs to be Allowed to intervene with It” (pages 117–128):
Chapter eight “God Made plenty of Small Crystals” (pages 129–144):
Chapter nine The getting older Crisis—Stopgap Measures (pages 145–152):
Chapter 10 The getting older Crisis—Physics to the Rescue! (pages 153–161):
Chapter eleven “Without Crystals you've got Radio; With Them, Communications” (pages 163–173):

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Additional resources for Crystal Clear: The Struggle for Reliable Communications Technology in World War II

Sample text

Jeeps). Experiments were run by radio technicians to determine the ability of the sets to operate without interference from neighboring channels and the ease of setting up and maintaining radio nets. For the first test, four cars were utilized: one as the receiver, one transmitting the desired signal, and two transmitting interference signals at frequencies close to that of the desired signal. The vehicles were distributed over different distances with respect to the receiving car. It was found that, for a channel separation of 10kHz, the desired signal could be received satisfactorily at a range of one mile, even if the interfering transmitter was as close as 50 yards.

Parrish, a mineralogist from Penn State, was assigned the problems of crystal orientation and production. He recruited two of his graduate school associates, Dick Stoiber and Clifford Frondel, to join the QCS in June 1942. Woods, a mechanical engineer recruited from the Patent Office, was involved with creating an equipment pool from which manufacturers could order needed pieces of production machinery. T. and former researcher at the Naval Research Laboratory, played the roles of field engineer and consultant.

Issues of plant size, finances, present operations, technical and engineering personnel, along with available production equipment and the personality of the owners were investigated. Those that seemed capable of converting to crystal CRYSTAL CLEAR 43 production were usually directed to prime contractors within their geographical region for the possibility of subcontracting. Much less emphasis was placed on current manufacturing activities than on the ability to retool quickly. 74 Nevertheless, many prospective quartz producers were turned down by the QCS.

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