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GEMA: Birthplace of German Radar and Sonar [Hardcover]

Harry von Kroge

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Book Description

Jan. 1 2000 0750307323 978-0750307321 1
In Germany, the development of the first technologies of sonar and radar were interrelated. Following Christian Hülsmeyer's forgotten invention of the "Telemobiloskop" in 1904, two Berlin engineers, Paul Günther Erbslöh and Hans-Karl von Willisen, developed and built devices to locate targets accurately by reflections with underwater sound and radio waves. In 1934, they found their own company for this work, called Gesellschaft für Elektroakustische und Mechanische Apparate (GEMA), which became the birthplace of their famous Freya air-warning and Seetakt ocean-surveillance radars.

Harry von Kroge has devoted decades to collecting a mass of statements and widely scattered documentary material about the evolution of GEMA's sonar and radar. GEMA: Birthplace of German Radar and Sonar, the English edition of von Kroge's first important, seminal work, discusses previously unavailable parts of the fascinating story of pioneering efforts in learning to see in the darkness. It relates the fascinating story of how German radar and sonar were developed in the years leading up to and during World War II. The author provides insights into the difficulties encountered on the way to the first promising results in target detection and ranging without optical visibility. The book includes rare technical descriptions as well as information about industrial and scientific cooperation involving secret equipment in Germany before 1945.

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Product Description


This is a detailed, professional-level book with ample technical coverage of the various sets, production figures for each model, proper citation of sources, and name and subject indexes. It does an excellent job of reconstructing the company's history despite the passage of time and the wartime loss of records. The photographs of the various radar sets are plentiful and of unusually good quality.
-Tube Collector

This will be an essential text for specialists, and an informative read for those with a general interest in the field.
-Dr. John Beavis, Transmission Lines

If you want to have a well-rounded, complete perspective on the birth and development of radar, GEMA: Birthplace of German Radar and Sonar is essential.
… a very welcome addition to the literature.
-Centaurus, 2001

… the work really is worth reading.
-IEEE AES Systems Magazine

Offers rare technical descriptions as well as information about industrial and scientific cooperation involving secret equipment in Germany before 1945.
-Book News

All in all, the volume is well written, perhaps partly due to Brown's involvement.
-History of Physics Newsletter, Volume VIII, No. 5

Inside This Book (Learn More)
First Sentence
A number of circumstances caused me to probe into the history of a corpora that had considerable importance for radar technology in Germany from it's beginning until 1945. Read the first page
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Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
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1 of 1 people found the following review helpful
4.0 out of 5 stars A necessary addition Jan. 19 2011
By J. Sullivan - Published on
Format:Hardcover|Verified Purchase
If you are studying the history of WWII, or of radar, or of the Luftwaffe, this small book is a necessary part of your library. Well done & authoritative but not for kids. Excellent detail photos of large raedar antenna installations.

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