IEEE Sweden MN2020-Q2
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SWB-Info QSL, Comments, Etc
Issue no. 1965, Dec 13, 2020 Deadline e-mail next issue: 0800 UTC, Dec 27, 2020 This time I will start SWB-info with a Merry Christ- mas to all of you. SWB on HCDX: http://www.hard-core-dx.com/swb Dateline Bogotá 1993-1998: http://www.hard-core-dx.com/swb/Dateline.htm This Christmas will be SWB latest issue/archive: http://www.hard-core-dx.com/swb/archive.htm far from normal for most of us due to the . Corona restrictions. The QSL, comments, etc recommendation here in Christer Brunström: Channel 292 9670 eQSL. Sweden is that no more Radio Taiwan International, Tamsui 7250, 7380, 9540, 11600, 11990. Radio than 8 people can meet Taiwan International via Bulgaria 6005 kHz QSL-cards. and celebrate Christ- mas. Manuel Méndez. 6045, Radio 60! via Nauen, received eQSL in 1 day. Recept- So this year we will ion report sent to: [email protected] . KBC Radio via Noratus, Ar- split the family tradi- menia, rec eived eQSL in 2 days. 9670, Channel 292, Rohrbach, received eQSL tions. Above that this year we in 130 days. Reception report sent to: [email protected] Reception report sent have to cancel my to: [email protected] . ZAMBIA, 11680, Indian Short DX Club Inter- wife’s birthday on Dec national via Wavescan, Voice of Hope Africa, Makeni Ranch, received eQSL in 23 when a lot of our 55 days. Reception report sent to: [email protected] relatives and friends use to come. As a result of all re- strictions a a large part of the Christmas pur- chases are made by mail order and the city shops have big prob- lems with thie econ- omy. -
Army Radio Communication in the Great War Keith R Thrower, OBE
Army radio communication in the Great War Keith R Thrower, OBE Introduction Prior to the outbreak of WW1 in August 1914 many of the techniques to be used in later years for radio communications had already been invented, although most were still at an early stage of practical application. Radio transmitters at that time were predominantly using spark discharge from a high voltage induction coil, which created a series of damped oscillations in an associated tuned circuit at the rate of the spark discharge. The transmitted signal was noisy and rich in harmonics and spread widely over the radio spectrum. The ideal transmission was a continuous wave (CW) and there were three methods for producing this: 1. From an HF alternator, the practical design of which was made by the US General Electric engineer Ernst Alexanderson, initially based on a specification by Reginald Fessenden. These alternators were primarily intended for high-power, long-wave transmission and not suitable for use on the battlefield. 2. Arc generator, the practical form of which was invented by Valdemar Poulsen in 1902. Again the transmitters were high power and not suitable for battlefield use. 3. Valve oscillator, which was invented by the German engineer, Alexander Meissner, and patented in April 1913. Several important circuits using valves had been produced by 1914. These include: (a) the heterodyne, an oscillator circuit used to mix with an incoming continuous wave signal and beat it down to an audible note; (b) the detector, to extract the audio signal from the high frequency carrier; (c) the amplifier, both for the incoming high frequency signal and the detected audio or the beat signal from the heterodyne receiver; (d) regenerative feedback from the output of the detector or RF amplifier to its input, which had the effect of sharpening the tuning and increasing the amplification. -
Evaluations of Cultural Properties
WHC-04/28COM/INF.14A UNESCO WORLD HERITAGE CONVENTION WORLD HERITAGE COMMITTEE 28th ordinary session (28 June – 7 July 2004) Suzhou (China) EVALUATIONS OF CULTURAL PROPERTIES Prepared by the International Council on Monuments and Sites (ICOMOS) The IUCN and ICOMOS evaluations are made available to members of the World Heritage Committee. A small number of additional copies are also available from the secretariat. Thank you 2004 WORLD HERITAGE LIST Nominations 2004 I NOMINATIONS OF MIXED PROPERTIES TO THE WORLD HERITAGE LIST A Europe – North America Extensions of properties inscribed on the World Heritage List United Kingdom – [N/C 387 bis] - St Kilda (Hirta) 1 B Latin America and the Caribbean New nominations Ecuador – [N/C 1124] - Cajas Lakes and the Ruins of Paredones 5 II NOMINATIONS OF CULTURAL PROPERTIES TO THE WORLD HERITAGE LIST A Africa New nominations Mali – [C 1139] - Tomb of Askia 9 Togo – [C 1140] - Koutammakou, the Land of the Batammariba 13 B Arab States New nominations Jordan – [C 1093] - Um er-Rasas (Kastron Mefa'a) 17 Properties deferred or referred back by previous sessions of the World Heritage Committee Morocco – [C 1058 rev] See addendum: - Portuguese City of El Jadida (Mazagan) WHC-04/28.COM/INF.15A Add C Asia – Pacific New nominations Australia – [C 1131] - Royal Exhibition Building and Carlton Gardens 19 China – [C 1135] - Capital Cities and Tombs of the Ancient Koguryo Kingdom 24 India – [C 1101] - Champaner-Pavagadh Archaeological Park 26 Iran – [C 1106] - Pasargadae (Pasargad) 30 Japan – [C 1142] - Sacred Sites -
Television, Farnsworth and Sarnoff
by AARON SORKIN directed by NICK BOWLING STUDY GUIDE prepared by Maren Robinson, Dramaturg This Study Guide for The Farnsworth Invention was prepared by Maren Robinson and edited by Lara Goetsch for TimeLine Theatre, its patrons and educational outreach. Please request permission to use these materials for any subsequent production. © TimeLine Theatre 2010 — — STUDY GUIDE — Table of Contents The Playwright: Aaron Sorkin .................................................................................... 3 The History: Sorkin’s Artistic License ........................................................................ 3 The People: Philo T. Farnsworth ................................................................................. 4 The People: David Sarnoff ........................................................................................... 6 The People: Other Players ........................................................................................... 8 Television: The Business ........................................................................................... 14 The Radio Corporation of America Patent Pool ................................................ 14 Other Players in Early Radio and Television ................................................... 16 Television: The Science .............................................................................................. 16 Timeline of Selected Events: Television, Farnsworth and Sarnoff .......................... 20 Television by the Numbers ....................................................................................... -
A Short History of Radio
Winter 2003-2004 AA ShortShort HistoryHistory ofof RadioRadio With an Inside Focus on Mobile Radio PIONEERS OF RADIO If success has many fathers, then radio • Edwin Armstrong—this WWI Army officer, Columbia is one of the world’s greatest University engineering professor, and creator of FM radio successes. Perhaps one simple way to sort out this invented the regenerative circuit, the first amplifying re- multiple parentage is to place those who have been ceiver and reliable continuous-wave transmitter; and the given credit for “fathering” superheterodyne circuit, a means of receiving, converting radio into groups. and amplifying weak, high-frequency electromagnetic waves. His inventions are considered by many to provide the foundation for cellular The Scientists: phones. • Henirich Hertz—this Clockwise from German physicist, who died of blood poisoning at bottom-Ernst age 37, was the first to Alexanderson prove that you could (1878-1975), transmit and receive Reginald Fessin- electric waves wirelessly. den (1866-1932), Although Hertz originally Heinrich Hertz thought his work had no (1857-1894), practical use, today it is Edwin Armstrong recognized as the fundamental (1890-1954), Lee building block of radio and every DeForest (1873- frequency measurement is named 1961), and Nikola after him (the Hertz). Tesla (1856-1943). • Nikola Tesla—was a Serbian- Center color American inventor who discovered photo is Gug- the basis for most alternating-current lielmo Marconi machinery. In 1884, a year after (1874-1937). coming to the United States he sold The Businessmen: the patent rights for his system of alternating- current dynamos, transformers, and motors to George • Guglielmo Marconi—this Italian crea- Westinghouse. -
Cultural Heritage Preservation: the Past, the Present and the Future
CULTURAL HERITAGE PRESERVATION: THE PAST, THE PRESENT AND THE FUTURE AND THE PRESENT THE PAST, PRESERVATION: HERITAGE CULTURAL Cultural Heritage Preservation: The Past, the Present and the Future “Heritage comes in many shapes—in tangible forms such as sites, build- ings, landscapes, or as intangibles, like memories, emotions, values and customs—as does the use of heritage, ranging from the purpose of build- ing nations to marketing places. Heritage usually represents a phenomenon within a traditional historical discourse but have lately, more and more, Cultural Heritage Preservation: come to take in peripheral appearances; often emanating from groups at the fringes of that traditional discourse as well. The use of heritage occurs The Past, the Present and the Future in different arenas and takes on significance as a vehicle for political, cultural and entrepreneurial purposes, as well as educational and emancipatory, to name just a few. How to interpret heritage in order to understand its meaning to different groups is therefore a very important task.” This anthology describes heritage preservation, development and manage- Tomas Nilson & Kristina Thorell (eds.) ment from different theoretical views and disciplines. It integrates per- spectives from history, human geography, archaeology, social anthropology THORELL (EDS.) NILSON & KRISTINA TOMAS and heritage conservation. The texts revolve around different dimension of culture and heritage via examples from varying contexts and locations. Forskning i Halmstad nr 24 Halmstad University ISBN 978-91-87045-94-3 (printed) ISBN 978-91-87045-95-0 (pdf) Halmstad University Press Mailing address: P.O. Box 823 SE-301 18 Halmstad Halmstad 2018 Telephone: +46 35-16 71 00 E-mail: [email protected] www.hh.se Forskning i Halmstad nr 24 CULTURAL HERITAGE PRESERVATION: THE PAST, THE PRESENT AND THE FUTURE FORSKNING I HALMSTAD NR. -
ABSTRACT AWA Review Wireless Comes of Age on the West Coast1
Lee AWA Review Wireless Comes of Age on the West Coast1 !2011 Bartholomew Lee ABSTRACT This is a story primarily about young men and what they accomplished in a remarkable Radio as we know it time, the fi rst two decades of the 20th Century, had many fathers. Cali- and in remarkable places – especially in Cali- fornia enjoyed unique fornia in the Western United States. Guglielmo circumstances that gave (William) Marconi, in his early twenties, elec- rise to independent de- trifi ed the technical world of the late 19th Cen- velopment. Young men tury with his successes using Hertzian electro- explored and advanced magnetic waves to communicate at distance, devices and means of what we now call “radio.” He did this without communication as soon the wired connections to which the world had as they read about ear- turned with enthusiasm earlier in the century. lier advances, especially The telegraph, including undersea cables, and Marconi’s use of wireless the telephone, needed wire, and lots of it. Com- spark systems. The arc munication without such wires, at fi rst wireless as a generator of high telegraphy, opened new vistas. This was par- power continuous wave ticularly so looking out to the world’s oceans. energy for communica- Communication with ships at sea (Marconi’s tions came to California primary initial interest) was now possible. Then, and then the world. Doc a challenge to the expensive cable monopolies Herrold began the fi rst could be mounted. This was so because the new regular broadcasting to a “wireless” meant exactly that: no expensive, known audience around capital-intensive investments in cables, only 1912 in California, using in terminal stations. -
Final Summary Report Grimeton Radio Station 17,2 Khz Alexanderson Day 2021-07-04 Transmissions
Final Summary Report Grimeton Radio Station 17,2 kHz Alexanderson Day 2021-07-04 Transmissions Country City Name Call sign Equipment Equipment details Reception Quality Additional Information Base Loaded 13 m vertical. RSP2 SDR. SDR- or Kiwi-SDR & local Windows 7 PC and SDRConsole Australia Bayswater Bentley Stephen VK3YJQ antenna Software. Unheard SDR- or Kiwi-SDR & local Airspy HF+ Discovery, Mini-whip and SDR There was no sign of JXN on 16.4kHz so I'm not surprised Australia TAROONA VERRALL Richard VK7RZ antenna Sharp software Unheard that SAQ was not able to be copied. SDR- or Kiwi-SDR & local Austria Wien Strukov Urs OE1 / HB9DIL antenna QRK 4 vvv de saq at 0845 utc SDR- or Kiwi-SDR & local Austria Leobendorf Michl Aschauer OE3MAA antenna KiwiSDR on AAA-1C Antenna 252 Audio recording: https://www.dropbox. SDR- or Kiwi-SDR & local com/s/le0ak0mafdkfstb/SAQ%20Grimeton_17% Austria Leibnitz Robic Patrick Patrick Robic antenna Perseus SDR with MiniWhip antenna SINPO 24442 2C2_040721_0858.mp3?dl=0 Radio receiver & local Austria Gmunden Hartwin Vichtbaur OE5VCM antenna LOOP ANT QSA 4 Transmission of a message at 11:00 CET (09:00 UTC) Tnx for Activity, fine Job! I had S7 QRM and S9+5 QRN peaks due to G5RV as "short wire" for 17,2 kHz. Thunderstorms over central- and northern Europe. But no Radio receiver & local Mixer to 14,0172 MHz (NE612). Problem to copy both SAQ-transmissions today: S9+10! Austria Bregenz Roland Manner OE9RMV antenna RX: Kenwood TS590SG. 599 Vy 73 de Roland, OE9RMV Nearly the same reception quality on both Excalibur Pro settings: DDC bandwidth 24 kHz, RBW 1Hz, Winradio WR-G33DDC Exclibur Pro, transmissions. -
Varberg Radio Station (Sweden) Extending to the Borders of the Site and Adjacent Properties
from the top to an inductance coil on the ground. Buried in the ground is a counterpoise network of copper wire, Varberg Radio Station (Sweden) extending to the borders of the site and adjacent properties. A system of electricity wires on wooden poles connects No 1134 the inductance coils with the buried network. An ice- melting transformer house close to the transmitter hall provides electricity to heat up and free the wires of ice in the winter. The site also comprises a large number of 1. BASIC DATA shortwave antennae of various designs, some still in commercial use, as well as some remains now out of use. State Party: Sweden The residential area has 12 houses for the station manager Name of property: Varberg Radio Station and staff. Location: County of Halland Date received: 21 January 2003 History th Category of property: In the 19 century, scientific and technical developments in telecommunication were based on inventions by people In terms of the categories of cultural property set out in like Michael Faraday, J.C. Maxwell, H. Hertz, and Article 1 of the 1972 World Heritage Convention, this is a Guglielmo Marconi. The use of telegraph started in the monument. second half of the century. From here, telegraphic and radio transmissions developed further in the early 20th Brief description: century. The first experiments to have wireless The Varberg Radio Station at Grimeton in southern transmission of speech across the Atlantic were in 1915 Sweden was built in 1922-24. It is an exceptionally well and 1919. preserved monument to the early phase of wireless In Sweden, the contribution of the chief engineer Ernst transatlantic communication system. -
1. MDI Combroad Fm 3Pp.Indd
COMMUNICATIONS AND BROADCASTING Milestones in Discovery and Invention COMMUNICATIONS AND BROADCASTING REVISED EDITION FROM WIRED WORDS TO WIRELESS WEB uHarry Henderson COMMUNICATIONS AND BROADCASTING: From Wired Words to Wireless Web, Revised Edition Copyright © 2007, 1997 by Harry Henderson All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, record- ing, or by any information storage or retrieval systems, without permission in writing from the publisher. For information contact: Chelsea House An imprint of Infobase Publishing 132 West 31st Street New York NY 10001 Library of Congress Cataloging-in-Publication Data Henderson, Harry. Communications and broadcasting : from wired words to wireless Web / Harry Henderson.—Rev. ed. p. cm. Includes bibliographical references and index. ISBN 0-8160-5748-6 1. Telecommunication—History—Juvenile literature. I. Title. TK5102.4.H46 2006 384—dc22 2006005577 Chelsea House books are available at special discounts when purchased in bulk quantities for businesses, associations, institutions, or sales promotions. Please call our Special Sales Department in New York at (212) 967-8800 or (800) 322-8755. You can find Chelsea House on the World Wide Web at http://www.chelseahouse.com Text design by James Scotto-Lavino Cover design by Dorothy M. Preston Illustrations by Sholto Ainslie and Melissa Ericksen Printed in the United States of America MP FOF 10 9 8 7 6 5 4 3 2 1 This book is printed on acid-free paper. -
Reception of SAQ Transmissions at Cohoe Radio Observatory on 1 July 2018 Whitham D
Reception of SAQ Transmissions at Cohoe Radio Observatory on 1 July 2018 Whitham D. Reeve 1. Introduction In early June 2018 I was notified of the annual commemorative transmissions from Sweden planned for Alexanderson Day on 1 July 2018. These transmissions use the historical call sign SAQ and are sponsored by the Alexander Association, a group of dedicated historical radio enthusiasts. The station transmits only on special occasions. I previously attempted to receive SAQ’s transmissions on Christmas day 2017 at Anchorage but the local noise levels were far too high. During that same month I installed a new loop antenna at my Cohoe Radio Observatory for monitoring VLF and LF transmissions and detecting sudden ionospheric disturbances (SID). This installation uses an SDRPlay RSP2Pro software defined radio (SDR) receiver and SDRuno software. The initial site survey and test results with this combination were quite encouraging. I decided to attempt reception of the Alexanderson Day event at CRO and was successful. This paper describes the setup and results. 2. Stations The transmitting and receiving stations are on opposite sides of Earth but at roughly similar latitudes (table 1). Both stations are not far above sea level and are near to the ocean. The great circle path between SAQ and CRO is mostly over water and ice and passes almost directly over the North Pole (figure 1). Table 1 ~ Transmitting and receiving station details (AMSL: above mean sea level; AGL: above ground level; TN: true north reference) Elevation Antenna height Distance Direction Station Latitude Longitude (m AMSL) (m AGL) (km) (° TN) SAQ, Grimeton, 57° 06’ 23.1” N 12° 23’ 28.6” E 35 127 351 Sweden 6870 CRO, Cohoe, Alaska 60° 22' 04.7"N 151° 18' 55.1"W 22 3.5 010 USA SAQ is a historical longwave communications station in Grimeton, Sweden. -
2019-2020 World Heritage
4 T rom the vast plains of the Serengeti to historic cities such T 7 as Vienna, Lima and Kyoto; from the prehistoric rock art 1 ICELAND 5 3 on the Iberian Peninsula to the Statue of Liberty; from the 2 8 Kasbah of Algiers to the Imperial Palace in Beijing — all 5 2 of these places, as varied as they are, have one thing in common. FINLAND O 3 All are World Heritage sites of outstanding cultural or natural 3 T 15 6 SWEDEN 13 4 value to humanity and are worthy of protection for future 1 5 1 1 14 T 24 NORWAY 11 2 20 generations to know and enjoy. 2 RUSSIAN 23 NIO M O UN IM D 1 R I 3 4 T A FEDERATION A L T • P 7 • W L 1 O 17 A 2 I 5 ESTONIA 6 R D L D N 7 O 7 H 25 E M R 4 I E 3 T IN AG O 18 E • IM 8 PATR Key LATVIA 6 United Nations World 1 Cultural property The designations employed and the presentation 1 T Educational, Scientific and Heritage of material on this map do not imply the expres- 12 Cultural Organization Convention 1 Natural property 28 T sion of any opinion whatsoever on the part of 14 10 1 1 22 DENMARK 9 LITHUANIA Mixed property (cultural and natural) 7 3 N UNESCO and National Geographic Society con- G 1 A UNITED 2 2 Transnational property cerning the legal status of any country, territory, 2 6 5 1 30 X BELARUS 1 city or area or of its authoritiess.