Image 41 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
Chapter 2 THE ORIGIN OF MICROWAVE RADAR AND LORAN NAVIGATION DEVELOPMENTS IN THE NDRC 2.1 INTRODUCTION O NE OF THE LARGEST and most active divisions of the National Defense Research Commit- tee...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 42 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
26 RADAR AND LORAN NAVIGATION DEVELOPMENTS were engaged in radar development under Divi- sion 14 contracts, and of these over 3,900 were employees of MIT-RL. The nucleus of nearly a thousand scientists...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 43 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
RADAR BEFORE 1940 27 first search sets, the SCR-270 and its successor the SCR-271, were land installations designed to give long-range detection and early warning against aircraft. The SCR-270 was a mobile...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 44 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
28 RADAR AND LORAN NAVIGATION DEVELOPMENTS fall of 1940. Just as the CH stations played an historic role in repelling the daylight bombing during the first phase of the Battle of Britain...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 45 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
EARLY HISTORY OF MICROWAVES 29 pany. This tube had very poor efficiency even for the generation of comparatively low frequencies. Shortly afterward it was discovered in Germany that dividing the cylindrical anode...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 46 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
30 RADAR AND LORAN NAVIGATION DEVELOPMENTS of aircraft detection using the klystron as the source of c-w radiation was in progress at San Carlos, California. This was a joint project of the...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 47 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
THE BRITISH TECHNICAL MISSION 31 other men who had experience with the micro- wave field: E. L. Bowles of MIT, who became secretary of the committee, and Hugh H. Willis, research Director...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 48 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
32 RADAR AND LORAN NAVIGATION DEVELOPMENTS for the first time in this country in the presence of Bell engineers and work on duplicating the device began the following day at BTL. Meanwhile...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 49 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
FOUNDATION OF THE RADIATION LABORATORY 33 Committee. This covered the five development contracts for the components and the contract with MIT which was later signed on February 5, 1941. The sum of...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 50 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
34 RADAR AND LORAN NAVIGATION DEVELOPMENTS shortly after. It was recognized from the begin- ning that these components were only a starting point. Work was coordinately begun on testing and adapting the...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 51 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
FOUNDATION OF THE RADIATION LABORATORY 35 development, upon which most of the Laboratory effort was concentrated, and the less extensive results of Project II, gunlaying, and Project III, long-range navigation, to be...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 55 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
Chapter 3 TECHNICAL PROGRAM OF THE RADIATION LABORATORY 3.1 MICROWAVE RESEARCH U nquestionably the most important aspect of the laboratory’s effort during the first year, and almost equally vital in the years...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 56 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
40 TECHNICAL PROGRAM OF THE RADIATION LABORATORY pulses to the receiver, and to synchronize the sweep circuits for the cathode-ray tube. Only the briefest outline is possible here of the complex activity...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 57 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
DEVELOPMENT OF IMPROVED COMPONENTS 41 quired for microwave radar. In its broad out- lines, the development was conservative and there was no departure from the basic super- heterodyne principle ; yet there...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 58 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
42 TECHNICAL PROGRAM OF THE RADIATION LABORATORY search laboratories worked closely together in cooperation with the MIT-RL indicator section which served principally in the role of a coordi- nating and testing center...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 59 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
PROJECT II: FIRE CONTROL AND AUTOMATIC TRACKING— SCR.584 43 finished set. From this cooperation emerged the first production AI set, the SCR-520, of which 50 were produced by the Western Electric Company...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 60 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
44 TECHNICAL PROGRAM OF THE RADIATION LABORATORY about the axis of a paraboloid, so that it describes a cone of revolution Avith its apex at the antenna. This produces the same effect...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 61 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
MICROWAVE RADAR OVER WATER SG, SCR.582, ASG 45 ing. It was not originally intended that the XT-1 should become a model for a specific military weapon, and work was undertaken in July...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 62 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
46 TECHNICAL PROGRAM OF THE RADIATION LABORATORY board equipment, the first ASV systems and the first microwave system for coast defense and harbor-entrance control duties. These systems were all characterized by being...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 63 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
MICROWAVE RADAR OVER WATER SG, SCR-582, ASG 47 discussions at MIT-RL. The first steps were ta- ken in the spring of 1941, shortly after the his- toric flight in the B-18 flying...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 64 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
48 TECHNICAL PROGRAM OF THE RADIATION LABORATORY craft the laboratory AI program had slowed up beyond resuscitation and .that the components intended for the British Beaufighters could be used, with only slight...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 65 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
PROJECT III: LONG-RANGE NAVIGATION (LORAN) 49 ner and Lt. Comdr. D. T. Ferrier representing the Navy, to decide on the proper features for a production set to be installed in blimps. The...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 66 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
50 TECHNICAL PROGRAM OF THE RADIATION LABORATORY circuits similar to those of the radar range unit and a cathode-ray tube indicator with a double trace. The pulses of two stations appear on...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 67 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
RADAR ON THREE CENTIMETERS 51 well as over the sea. In the summer of 1943, a system using this technique was proposed to the RAF and accepted by them pending a successful...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 68 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
52 TECHNICAL PROGRAM OF THE RADIATION LABORATORY truck system for almost three months, demon- strating its superiority over the 10-cm system in obtaining much higher resolution of targets. AIA Fighter Plane System...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 69 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
RADAR ON THREE CENTIMETERS 53 signed as a prototype of any development, was completed and flight tested in June 1942. Much flying was done during 1942 and 1943 to explore the behavior...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 70 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
54 TECHNICAL PROGRAM OF THE RADIATION LABORATORY large extent with smaller electronic concerns, or at least with companies having modest research and development organizations. MIT-RL be- came the design and development organization...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 71 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
Chapter 4 THE COLUMBIA RADIATION LABORATORY 4.1 FOUNDATION OF THE TUBE AND CIRCUIT LABORATORY B y the spring of 1942 the Massachusetts Institute of Technology Radiation Labora- tory [MIT-RL] found itself heavily...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 72 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
56 THE COLUMBIA RADIATION LABORATORY in turn, was approved by the Director of OSRD, Irvin Stewart wrote to Columbia giving the uni- versity an informal authorization to proceed. Meanwhile preparatory steps were...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 73 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
TECHNICAL DEVELOPMENTS: MAGNETRONS ON 1 CENTIMETER 57 4.2 TECHNICAL DEVELOPMENTS: MAGNETRONS ON 1 CENTIMETER Basic Research The work at Columbia went forward in close cooperation with MIT-RL, but with little or no...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 74 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
58 THE COLUMBIA RADIATION LABORATORY E-5-Tube Developments (3J30) The B and C tubes both had an output consist- ing of a pickup loop leading into a coaxial line. A waveguide output offered...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 75 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
TECHNICAL DEVELOPMENTS: MAGNETRONS ON 1 CENTIMETER 59 Radial Strapped-Tube Design About the beginning of 1944 radial strapping was adopted. Straps of this sort are easier to space and to inspect. A special...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 76 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
60 THE COLUMBIA RADIATION LABORATORY States, but continue, in parallel with the United States, to do work on experimental 3-cm systems. America was to provide 3-cm magnetrons for the systems development work...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 77 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
TECHNICAL DEVELOPMENTS: MAGNETRONS ON 1 CENTIMETER 61 a single plug in one resonant element gave roughly a 2.5 per cent tuning range over which the power remained roughly constant. The fre- quency...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 78 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
62 THE COLUMBIA RADIATION LABORATORY RL. This company brought forth a good design which was submitted to the Bell people. Final Design and Production On March 6, 1944, Fisk, Hagstrom, and Glass...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 79 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
Chapter 5 SELECTED GROUND SYSTEMS PROJECTS 5 1 HIGH-POWER RADAR FOR GROUND CONTROL OF INTERCEPTION, SCR-615 I N THE SPRING of 1941, MIT-RL sent one of its section leaders, K. T. Bainbridge,...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
Date:1946
Book/Printed Material
Image 80 of Radar : summary report and Harp Project.
Summary technical report of the National Defense Research Committee
64 SELECTED GROUND SYSTEMS PROJECTS hundred were produced in the next two years. The SCR-615 was not widely used or thor- oughly satisfactory as a GCI set, in fact it did not...
Contributor:
United States. Office of Scientific Research and Development. National Defense Research Committee
