RADIO AGE BALLOT Aerial Radiations
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Bull Electrical-Jun03.Qxd
Constructional Project PRACTICAL RADIO CIRCUITS RAYMOND HAIGH Part 1: Introduction, Simple Receivers and a Headphone Amp. Dispelling the mysteries of radio. This new series features a variety of practical circuits for the set builder and experimenter. owards the end of the 19th century, physicist who first demonstrated the exis- (V. Poulsen), and by mechanical alterna- sending a radio signal a few hun- tence of electromagnetic waves in 1886. tors (E. Alexanderson). Semiconductors T dred yards was considered a major Before the valve era, radio frequency now play an increasing role, but valves are achievement. At the close of the 20th, man oscillations were generated by using an still used in high-power transmitters. was communicating with space probes at electrical discharge to shock-excite a tuned As their name suggests, the waves com- the outermost edge of the solar system. circuit (H. Hertz and G. Marconi), by the prise an electric and a magnetic field No other area of science and technology negative resistance of an electric arc which are aligned at right angles to one has affected the lives of people another. The electric field is more completely. And because it formed by the rapid voltage fluctu- is so commonplace and afford- ations (oscillations) in the aerial. able, it is accepted without a sec- Current fluctuations create the ond thought. The millions who magnetic field. enjoy it, use it, even those whose lives depend upon it, often have HITCHING A RIDE little more than a vague notion of Electromagnetic waves cannot, A) how it works. by themselves, convey any informa- This series of articles will view tion. -
Ideology of the Air
IDEOLOGY OF THE AIR: COMMUNICATION POLICY AND THE PUBLIC INTEREST IN THE UNITED STATES AND GREAT BRITAIN, 1896-1935 A Dissertation presented to the Faculty of the Graduate School at the University of Missouri-Columbia In Partial Fulfillment Of the Requirements for the Degree Doctor of Philosophy by SETH D. ASHLEY Dr. Stephanie Craft, Dissertation Supervisor MAY 2011 The undersigned, appointed by Dean of the Graduate School, have examined the dissertation entitled IDEOLOGY OF THE AIR: COMMUNICATION POLICY AND THE PUBLIC INTEREST IN THE UNITED STATES AND GREAT BRITAIN, 1896-1935 presented by Seth D. Ashley a candidate for the degree of Doctor of Philosophy and hereby certify that, in their opinion, it is worthy of acceptance. ____________________________________________________________ Professor Stephanie Craft ____________________________________________________________ Professor Tim P. Vos ____________________________________________________________ Professor Charles Davis ____________________________________________________________ Professor Victoria Johnson ____________________________________________________________ Professor Robert McChesney For Mom and Dad. Thanks for helping me explore so many different paths. ACKNOWLEDGEMENTS When I entered the master’s program at the University of Missouri School of Journalism, my aim was to become a practitioner of journalism, but the excellent faculty members I worked with helped me aspire to become a scholar. First and foremost is Dr. Stephanie Craft, who has challenged and supported me for more than a decade. I could not have completed this dissertation or this degree without her. I was also fortunate to have early encounters with Dr. Charles Davis and Dr. Don Ranly, who opened me to a world of ideas. More recently, Dr. Tim Vos and Dr. Victoria Johnson helped me identify and explore the ideas that were most important to me. -
Regenerative Radio Receivers 2/1/16, 7:47 PM
regenerative radio receivers 2/1/16, 7:47 PM WWW.ELECTRONICS-TUTORIALS.COM Recommend 28 Share 28 4 •NEW! ‣ - Amazon Electronic Component Packs. Check out the Amazon Electronic Component Packs page. What are the basics of regenerative radio receivers? Foreword - by Ian C. Purdie VK2TIP A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noise-limiting and agc action and, freedom from overloading and spurious responses. The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. They are simple detectors which may be used for cw or ssb when adjusted for oscillation or a-m phone when set just below point of oscillation. In contrast direct conversion receivers use a separate hetrodyne oscillator to produce a signal. In the comprehensive electronic project presented here, Charles Kitchin, N1TEV has provided us with a three stage receiver project which overcomes some of the limitations of this type of receiver, principally the provision of an rf amplifier ahead of the detector. We are indeed particularly grateful to "Chuck" Kitchin, a well noted technical author, for sharing this very valuable material with us to use, learn, experiment and above all, to enjoy. Introduction to the regenerative radio receiver project designed by "Chuck" Kitchin, N1TEV The radio described here is a two band short wave receiver which is both very sensitive and very portable. It receives AM, single sideband (SSB), and CW (code) signals over a frequency range of approximately 3.5 to 12MHz. This includes the 80, 40, and 30 meter Ham bands plus several international short wave bands. -
Build an Old Time One-Valve Radio T
•~ a.. e e Ifito .ega'3a, . tr Ssc~ . a~:r"..,`'r"'~g~~ t.~.= ~ y~~..i•'`'E~;sr,:~ .?-~`.r ;~'~I:i'Y ~~":'-:2i:5'-~'r:" *: ap~ i d -.t e -•i' e'•,y`. z'a--'~ ~a.r •~`,`'t ,'-yerk',t"3-c .rLt ~`u"r. ,~,`.~f'F' 06***104r"' G: _•ad2r. r,`r,*•r--,.x-00-fti;,s -,yr-4.o o-+J-0,0_4 03-c?'rv7-F * Special `nostalgia' project: BUILD AN OLD TIME ONE-VALVE RADIO T There's a lot of interest nowadays in building simple valve-based radio sets, of the type that were popular from the 1920s right up until the 1960s. Here's the first of two articles which give all the information you'll need to construct an authentic one-valver starting with a basic `grid-leak' set and progressing to a regenerative circuit with surprisingly good performance. Enough information is given to allow you to use almost any old valve or other components to hand. by PETER LAUGHTON Cleaning out my radio `shack' (read had, and how much I'd learned. This, cussion is the following project. mess) the other day, I came across a along with several recent Letters to The circuits described can be built number of radio receivers that I con- the Editor asking for more vintage using almost any combination of com- structed years ago based on valves, radio projects, resulted in me talking ponents, even from junked valve TV and remembered how much fun I'd to Jim Rowe, and the result of that dis- sets. -
A Fully Integrated CMOS Receiver by Dan Shi a Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree O
A Fully Integrated CMOS Receiver by Dan Shi A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Electrical Engineering) in The University of Michigan 2008 Doctoral Committee: Associate Professor Michael P. Flynn, Co-Chair Emeritus Research Scientist Jack R. East, Co-Chair Professor John P. Hayes Professor Amir Mortazawi Dan Shi © 2008 All Rights Reserved to my mom, dad, my sister and my wife… ii ACKNOWLEDGMENTS I would never have been able to finish my dissertation without the guidance of my committee members, the help from friends, and the support from my family and my wife. First, I would like to express my most sincere appreciation to my advisor, Dr. Michael P. Flynn, for instilling in me the qualities of being a good graduate student. His infectious enthusiasm and unlimited zeal have been major driving forces through my graduate career at The University of Michigan. Throughout my doctoral work he encouraged me to develop independent thinking and research skills. And I am particularly grateful for the advice, both technical and personal, that he has given me over the years. I would also like to thank my co-advisor, Dr. Jack R. East. Without his and Professor George I. Haddad’s continuous support, I would never be writing these lines. I would also like to thank the rest of my committee members: Professor Amir Mortazawi and Professor John P. Hayes for their invaluable feedback during my research. I would like to acknowledge Professor Kamal Sarabandi for his support of this research and for providing help during the final testing. -
Man of High Fidelity
Man of High Fidelity: EDWIN HOWARD ARMSTRONG A Biography – By Lawrence Lessing With a new forward by the author Page iii Pratt DISCLAIMER DISCLAIMER TO THIS SCANNED AND OCR PROCESSED COPY This PDF COPY is for use at Pratt Institute for Educational Purposes Only I affirm that sufficient print copies of the original Bantam Book Paperback are in stock in ARC E-08 that would more than adequately cover a full class use of the text. HOWEVER, due to the fact that the 1969 text is no longer in publication, complicated by the fact that these copies are forty-four (44) years old and in a very fragile condition, this PDF version of the text was created for student use in the Department of Mathematics and Science. - Professor Charles Rubenstein, January 2013 Man of High Fidelity: Edwin Howard Armstrong EDWIN HOWARD ARMSTRONG Was the last – and perhaps the least known – of the great American Inventors. Without his major contributions, the broadcasting industry would not be what it is today, and there would be no FM radio. But in time of mushrooming industry and mammoth corporations, the recognition of individual genius is often refused, and always minimized. This is the extraordinary true story of the discovery of high fidelity, the brilliant man and his devoted wife who battled against tremendous odds to have it adopted, and their long fight against the corporations that challenged their right to the credit and rewards. Mrs. Armstrong finally ensured that right nearly ten years after her husband’s death. Page i Cataloging Information Page This low-priced Bantam Book has been completely reset in a type face designed for easy reading, and was printed from new plates. -
MF Coastal Radio Stations
M.F. Coastal & Maritime Stations 1608 kHz to 4000 kHz This list was last amended 17th September 2008 TX Freq. RX Freq. Mode Callsign Station Name/Frequency Usage Country 1609 2144 SITOR TYA Cotonou Radio Benin 1612 2417 SITOR SUQ Ismaila Radio Egypt 1613 2148 SITOR TYA Cotonou Radio Benin 1614 2149 SITOR SUH El Iskandariya (Alexandria) Radio Egypt 1615 2150 SITOR TYA Cotonou Radio Benin 1615.5 2150.5 SITOR SVH Iraklion Kritis Radio Crete Greece 1618.5 2153.5 SITOR SUK Kosseir Radio Egypt 1621.5 2156.5 DSC LGP Bödo Radio Norway 1621.5 2156.5 DSC National Norwegian Channel Norway 1621.5 2156.5 DSC LGS Svalbard Radio Svalbard 1621.5 2156.5 DSC LGT Tjome Radio Norway 1621.5 2156.5 DSC LGV Vardö Radio Norway 1624.5 2159.5 DSC OXZ Lyngby Radio Denmark 1624.5 2159.5 DSC OXJ Torshavn Radio Faeroe Islands 1627.5 2162.5 DSC Den Helder Rescue Traffic Service Netherlands 1635 2060 SSB LGV Vardö/Hammerfest Radio Norway 1636.4 2045 SSB HZH Jeddah Radio Saudi Arabia 1638 2022 SSB OFK Turku/Vaasa Radio Finland 1641 2045 SSB OXJ Torshavn Radio Faeroe Islands 1641 2066 SSB OXJ Torshavn Radio Faeroe Islands 1642.5 1642.5 SSB Den Helder Rescue (Dutch Coast Guard) Netherlands 1644 2069 SSB EAL Las Palmas/Arrecife Radio Canary Islands 1644 2069 SSB EJM Malin Head Coast Guard Radio Republic of Ireland 1650 2075 SSB TYA Cotonou Radio Benin 1650 Broadcast SSB CROSS Griz-Nez France 1650 Broadcast SSB CROSS Corsen France 1650 Broadcast SSB CROSS Jobourg France 1650 SSB Kardla Piirivalve MRSCC Estonia 1650 SSB Kuressaare Piirivalve MRSCC Estonia 1650 2182 SSB 5VA -
SOME RECENT DEVELOPMENTS of REGENERATIVE Fication Which Is Based Fundamentally on Regeneration, but Which Existing Therein) Is E
SOME RECENT DEVELOPMENTS OF REGENERATIVE CIRCUITS* BY EDWIN H. ARMSTRONG (MARCELLUS HARTLEY RESEARCH LABORATORY, COLUMBIA UNIVERSITY, NEW YORK) It is the purpose of this paper to describe a method of ampli- fication which is based fundamentally on regeneration, but which involves the application of a principle and the attainment of a result which it is believed is new. This new result is obtained by the extension of regeneration into a field which lies beyond that hitherto considered its theoretical limit, and the process of amplification is therefore termed super-regeneration. Before proceeding with a description of this method it is in order to consider a few fundamental facts about regenerative circuits. It is well known that the effect of regeneration (that is, the supplying of energy to a circuit to reinforce the oscillations existing therein) is equivalent to introducing a negative resistance reaction in the circuit, which neutralizes positive resistance reaction, and thereby reduces the effective resistance of the cir- cuit. There are three conceivable relations between the nega- tive and positive resistances: namely-the negative resistance introduced may be less than the positive resistance, it may be equal to the positive resistance, or it may be greater than the positive resistance of the circuit. We will consider what occurs in a regenerative circuit con- taining inductance and capacity when an alternating electro- motive force of the resonant frequency is suddenly impressed for each of the three cases. In the first case (when the negative resistance is less than the positive), the free and forced oscillations have a maximum amplitude equal to the impnressed electomotive force over the effective resistance, and the free oscillation has a damping determined by this effective resistance. -
Edwin H. Armstrong Papers
Edwin H. Armstrong papers 1981.4 Finding aid prepared by Sarah Leu and Jack McCarthy through the Historical Society of Pennsylvania's Hidden Collections Initiative for Pennsylvania Small Archival Repositories. Last updated on September 12, 2016. The Historical and Interpretive Collections of The Franklin Institute Edwin H. Armstrong papers Table of Contents Summary Information....................................................................................................................................3 Biography/History..........................................................................................................................................4 Scope and Contents..................................................................................................................................... 10 Administrative Information......................................................................................................................... 11 Related Materials......................................................................................................................................... 12 Controlled Access Headings........................................................................................................................12 - Page 2 - Edwin H. Armstrong papers Summary Information Repository The Historical and Interpretive Collections of The Franklin Institute Creator Armstrong, Edwin H. (Edwin Howard), 1890-1954 Title Edwin H. Armstrong papers Call number 1981.4 Date [inclusive] 1909-1956 Extent -
Information to Users
INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bieedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. Bell & Howell Information and Learning 300 North Zeeb Road, Ann Arbor, Ml 48106-1346 USA 800-521-0600 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. HOORAY FOR HOLLYWOOD: GENDER AND SEXUAL NON-CONFORMITY LN THE CLASSICAL HOLLYWOOD ERA by Brett Leslie Abrams submitted to the Faculty of the College of Arts and Sciences of The American University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy [Education] in History i I Chair:lir: / a . -
Oscar Levant: Pianist, Gershwinite, Middlebrow Media Star
Washington University in St. Louis Washington University Open Scholarship Arts & Sciences Electronic Theses and Dissertations Arts & Sciences Spring 5-15-2020 Oscar Levant: Pianist, Gershwinite, Middlebrow Media Star Caleb Taylor Boyd Washington University in St. Louis Follow this and additional works at: https://openscholarship.wustl.edu/art_sci_etds Part of the Film and Media Studies Commons, Music Commons, and the Sociology Commons Recommended Citation Boyd, Caleb Taylor, "Oscar Levant: Pianist, Gershwinite, Middlebrow Media Star" (2020). Arts & Sciences Electronic Theses and Dissertations. 2169. https://openscholarship.wustl.edu/art_sci_etds/2169 This Dissertation is brought to you for free and open access by the Arts & Sciences at Washington University Open Scholarship. It has been accepted for inclusion in Arts & Sciences Electronic Theses and Dissertations by an authorized administrator of Washington University Open Scholarship. For more information, please contact [email protected]. WASHINGTON UNIVERSITY IN ST. LOUIS Department of Music Dissertation Examination Committee: Todd Decker, Chair Ben Duane Howard Pollack Alexander Stefaniak Gaylyn Studlar Oscar Levant: Pianist, Gershwinite, Middlebrow Media Star by Caleb T. Boyd A dissertation presented to The Graduate School of Washington University in partial fulfillment of the requirements for the degree of Doctor of Philosophy May 2020 St. Louis, Missouri © 2020, Caleb T. Boyd Table of Contents List of Figures ................................................................................................................................ -
Lawrence Morton Papers LSC.1522
http://oac.cdlib.org/findaid/ark:/13030/kt6d5nb3ht No online items Finding Aid for the Lawrence Morton Papers LSC.1522 Finding aid prepared by Phillip Lehrman, 2002; machine-readable finding aid created by Caroline Cubé. UCLA Library Special Collections Online finding aid last updated on 2020 February 21. Room A1713, Charles E. Young Research Library Box 951575 Los Angeles, CA 90095-1575 [email protected] URL: https://www.library.ucla.edu/special-collections Finding Aid for the Lawrence LSC.1522 1 Morton Papers LSC.1522 Contributing Institution: UCLA Library Special Collections Title: Lawrence Morton papers Identifier/Call Number: LSC.1522 Physical Description: 42.5 Linear Feet(85 boxes, 1 oversize folder, 50 oversize boxes) Date (inclusive): 1908-1987 Abstract: Lawrence Morton (1904-1987) played the organ for silent movies and studied in New York before moving to Los Angeles, California, in 1940. He was a music critic for Script magazine, was the executive director of Evenings on the Roof, director of the Ojai Music Festival and curator of music at the Los Angeles County Museum of Art. The collection consists of books, articles, musical scores, clippings, manuscripts, and correspondence related to Lawrence Morton and his activities and friends in the Southern California music scene. Stored off-site. All requests to access special collections material must be made in advance using the request button located on this page. Language of Material: Materials are in English. Conditions Governing Access Open for research. All requests to access special collections materials must be made in advance using the request button located on this page.