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Teleprinters for the Radio Amateur
TELEPRINTERS FOR THE RADIO AMATEUR http://www.rtty.com/England/creed1.html WWW.RTTY.COM History Hall TELEPRINTERS FOR THE RADIO AMATEUR by Alan G Hobbs, G8GOJ [email protected] There are many different types of mechanical teleprinter which become available on the surplus market from time to time, but we will only concern ourselves with the ones which are most liable to be encountered. The teleprinters that we will be considering come from three manufacturers: Creed & Company of England, the Teletype Corporation of the U.S.A., and Siemens of Germany. There are three fundamental requirements which must be considered before purchasing a machine: 1. The electrical signaling characteristics. 2. The code that the machine uses. 3. The signaling speed at which the machine operates. Signaling Characteristics Machines manufactured in the U.K. normally use what is known as Double Current or Polar signaling, in which the two signaling states, Mark and Space, are represented by current flowing in opposite directions, often +/- 20mA, with Mark being represented by a negative current flow. Whereas machines manufactured in the U.S.A. and Germany normally use what is known as Single Current or Neutral signaling, in which the two signaling states, Mark and Space, are represented by the presence or absence of current, often 60mA, the actual polarity being unimportant. Note that we are referring to current flow in each case, and not to voltages. The receiving section of a teleprinter usually consists of a form of electro-mechanical relay, often called the electro-magnet, with a fairly high inductance, perhaps up to 4 Henrys, and a low DC resistance, perhaps only 200 Ohms, which responds to the incoming signaling impulses. -
BT in the Community Better World – Our Commitment to Society Better World – Our Commitment to Society/Community
BT in the community Better World – Our Commitment to Society Better World – Our Commitment to Society/Community Community BT is committed to making a difference in society. We have a major programme of investment designed to improve the quality of life and well being of the communities in which we operate. In line with the business we are in, the central theme of our activities is improved communications. Over the past five years, we have provided more than £75 million in funding to schemes for social and community improvement. BT is a founder member of the Per Cent Club, and we donate a minimum of one half per cent of our annual pre-tax profits to not-for-profit causes. We also provide funding and support in kind which exceed one per cent. Estimates of this contribution so far show that this would make our total contribution for 2001/02 worth over £25m. Our community activities fall into four main categories: • education – from primary schools to universities, using a variety of techniques and media from live drama to web-based activities • charities and fundraising – we support a range of charities and fundraising initiatives • employee involvement – we encourage BT people to volunteer for community activities and make it easier for others to do so • arts and heritage – from modern art to the nation’s telecommunications heritage. This document is part of BT’s Social And Environmental Report and has been downloaded from the Better World website www.groupbt.com/betterworld. Information and data in this document has been verified by Lloyd’s Register Quality Assurance Limited. -
RTTY Journal© P.O
The New RTTY Journal© P.O. Box 236, Champaign, IL 61824-0236 Volume 47, Number 2, June 1999 $5.00 Ray Hunter, VE3UR, celebrated his 90th Birthday this year. Summer RTTYContest Schedule . .2A Little TTY History (Part 3) . .11 Hits and Misses . .3Dayton Pictures . .12 WPX - Multi-Two Operating at The Ranch . .41998 CQ/RJ RTTYDXContest Results . .18 5 Unit Codes . .6Happenings at Dayton . .19 Silent Key Ray Petit, W7GHM . .9“Free Drink Eddie” . .19 DSP and Soundcard Modems . .101999 CQ/RJ WPX Contest Results . .21 The P38is a multi-mode HF data modem that gives you top performance operation using RTTY, AMTOR, P-Mode* and CLOVER-II waveforms. The P38is a full sized plug-in card for PC-AT and faster personal computers. Multi-screen menu-driven HAL software is included with each P38modem. Many popu- lar “third-party” user programs are also available for the P38- W0RLI, WINLINK, WriteLog, XPWARE, EZTERM and RTTY by WF1B. The P38is complete and ready to run. Plug in the board, connect three phono cables to your radio, and install the soft- ware. That’s all there is to it! Whether you want to rag-chew, chase DX, or access electronic mail, the P38is the modem of choice. The HALRTTY-1 is an easy to use and very accurate tuning indicator. It may be used with virtually any FSK modem, TNC, multi-mode controller, demodulator, and receiver or transceiver. The crossed LED bars show correct tuning for all popular FSK modes including Baudot Teletype (RTTY), ASCII Teletype, AMTOR, SITOR, P-Mode*, and even HFPacket Radio. -
Scanned Image
Number 85 — :1 [arc/1, "Flprz'f 2003 Mfl/[czgni teatm ch‘L‘froy T-500'Bzg]Key I I I The InternationalI Journal of IMorse I I Telegraphy I Comment For a second issue in a row, I have to announce the passing of another great contributor MM. Dr. E. Geoffrey Walsh. GM4FH died on 26‘“ March. He was an enthusiastic contributor to MM as well as to “Transmitter", the newsletter of the Museum of Communication Foundation Trust. at Bo'ness near Edinburgh. He was an eminent medical physiologist at the University of Edinburgh, with medical degrees at Oxford and Harvard. but in his retirement years applied his research skills to many lifelong practical interests, especially Morse. He has written fascinating articles for MM, some as yet unpublished. To be greatly missed. Zyg Nilski, G30KD Contents News MM Photocopy Service Muckleburgh Update by Tony Smith, G4FAI Trains, Times & Telegraphs by E. Goof/"my Walsh, GM4FH ( SK) Showcase Morse Matters — Iambic Keying/DSP Audio Filter/How Fast is Fast by Dr Gary Bold, ZLIAN 33 William G. Pierpont — SK by Tony Smith, G4FAI 34 MM Bookshelf 36 Info Please! 38 Your Letters 46 MM Binders 47 Readers Ads flab/ems 4O Radio Bygones 32 Fists CW Club — The International Morse Preservation Society 9 Morse Enthusiasts Group, Scotland 46 The Radio Officers Association 45 G-QRP Club 47 The Art & Skill of Radio Telegraphy — book by William G. Pierpont. NQHFF Mflvf85 — Marcfi/flpriMOOJ’ 1 News Auction of Surplus museum store at Ashford. Middlesex. BT Museum Items BT‘s £6 million investment in the future conservation of the UK‘s uniquely rich Thousands of historic telecommunica- telecommunications heritage has three major. -
LCSH Section O
O, Inspector (Fictitious character) O-erh-kʾun Ho (Mongolia) O-wee-kay-no Indians USE Inspector O (Fictitious character) USE Orhon River (Mongolia) USE Oowekeeno Indians O,O-dimethyl S-phthalimidomethyl phosphorodithioate O-erh-kʾun River (Mongolia) O-wen-kʻo (Tribe) USE Phosmet USE Orhon River (Mongolia) USE Evenki (Asian people) O., Ophelia (Fictitious character) O-erh-to-ssu Basin (China) O-wen-kʻo language USE Ophelia O. (Fictitious character) USE Ordos Desert (China) USE Evenki language O/100 (Bomber) O-erh-to-ssu Desert (China) Ō-yama (Kanagawa-ken, Japan) USE Handley Page Type O (Bomber) USE Ordos Desert (China) USE Ōyama (Kanagawa-ken, Japan) O/400 (Bomber) O family (Not Subd Geog) O2 Arena (London, England) USE Handley Page Type O (Bomber) Ó Flannabhra family UF North Greenwich Arena (London, England) O and M instructors USE Flannery family BT Arenas—England USE Orientation and mobility instructors O.H. Ivie Reservoir (Tex.) O2 Ranch (Tex.) Ó Briain family UF Ivie Reservoir (Tex.) BT Ranches—Texas USE O'Brien family Stacy Reservoir (Tex.) OA (Disease) Ó Broin family BT Reservoirs—Texas USE Osteoarthritis USE Burns family O Hine Hukatere (N.Z.) OA-14 (Amphibian plane) O.C. Fisher Dam (Tex.) USE Franz Josef Glacier/Kā Roimata o Hine USE Grumman Widgeon (Amphibian plane) BT Dams—Texas Hukatere (N.Z.) Oa language O.C. Fisher Lake (Tex.) O-kee-pa (Religious ceremony) USE Pamoa language UF Culbertson Deal Reservoir (Tex.) BT Mandan dance Oab Luang National Park (Thailand) San Angelo Lake (Tex.) Mandan Indians—Rites and ceremonies USE ʻUtthayān hǣng Chāt ʻŌ̜p Lūang (Thailand) San Angelo Reservoir (Tex.) O.L. -
Boekman Thesaurus on Cultural Policy
Boekman thesaurus on cultural policy 11 January 2011 Content category page Arts and cultural policy 1 Art in general per sector 2 Art in general 2 Visual arts 5 Dance 7 Language and literature 7 Museums 8 Music 9 Theatre 10 Film 11 Architecture 11 Artists 13 Communication and media 15 Libraries and documentation 18 Society 18 Law and legislation 23 Public administration, policy 25 and management Economics and finance 28 Environment and technology 31 Science, research and 31 methodology Education and training 35 Professions, labour market and 37 leisure time Organizations 39 Health 40 Geographic areas 41 Publication form 48 Time periods 51 Arts and cultural policies cultural policy BT: government policy archaeology policy NT: arts policy BT: heritage policy heritage policy media policy architecture policy RT: cultural diffusion BT: arts policy national cultural memoranda (form) NT: welstandstoezicht (NL) cultural transfer RT: spatial planning international cultural policy support structure? archives policy SN: government policies at national level BT: heritage policy dance policy arts policy BT: theatre policy BT: cultural policy NT: architecture policy Deltaplan cultural conservation (NL) film policy BT: museum policy literature policy RT: collections management music policy SN: project in the Netherlands for the theatre policy conservation of library and museum collections visual arts policy design policy BKR works (NL) BT: visual arts policy RT: BKR (NL) repositories film policy SN: works of art funded by a visual artists BT: arts policy -
BT in the Community Better World – Our Commitment to Society Better World – Our Commitment to Society/Community
BT in the community Better World – Our Commitment to Society Better World – Our Commitment to Society/Community Contents BT in the community. page 3 Education . page 4 In schools . page 5 Resources on-line . page 5 International . page 7 Lifeskills . page 8 TalkWorks. page 8 Charities and Fundraising . page 10 Charities. page 10 Fundraising. page 12 Volunteering . page 16 Employee volunteering . page 16 Community volunteering. page 17 The arts and heritage . page 18 This document is part of BT’s Social And Environmental Report and has been downloaded from the Better World website www.groupbt.com/betterworld. Information and data in this document has been verified by Lloyd’s Register Quality Assurance Limited. 2 Better World – Our Commitment to Society/Community BT in the community BT is committed to making a difference in society and has a major programme of investment designed to improve the quality of life and well-being of the communities in which we operate. Over the past 5 years, we have provided more than £75 million in funding to schemes for social and community improvement. As a member of the Per Cent Club, BT guarantees to donate a minimum of 0.5 % of our annual pre-tax profits to not-for-profit causes. In 2000/2001 this commitment was worth up to £16 million, managed through our Community Partnership Programme in the UK, and including direct donations to charity of £1.2m. BT also provides additional funding and support in kind, which in 1999/2000 was estimated to be worth around £20m. As a global company, we support a number of social investment initiatives around the world, focusing primarily on the development of communications skills. -
Listening to the Past, Speaking to the Future
31358.NAPIER.96pp 23/3/04 7:51 PM Page 3 Listening to the Past, Speaking to the Future Report of the Archives Task Force 31358.NAPIER.96pp 23/3/04 7:51 PM Page 1 Contents Foreword 3 Executive Summary and Recommendations 4 The Power to Change Lives 10 1 The Importance of Archives 12 2 The Findings of the Task Force 16 A Strategy for Action 22 3 Access to All: a Gateway to UK Archives 24 4 Developing Archives and Audiences 34 5 Modernisation and Workforce Development 48 Funding, Recommendations, Next Steps 56 6 Next steps for Action and Delivery 58 Appendices 68 A Archives in 2004 70 The Breadth and Diversity of UK Archives 70 Archive Facts and Figures 70 – Examples of Archive Types Across the UK 72 – Archive Users – Age Profile 73 – Trends in Archive Visitor Numbers 1997–2001 74 – Archive Users at The National Archives, the National Archives 74 • of Scotland and the Public Record Office of Northern Ireland – Diversity of UK Archives in 2004 75 B Archive Networking Developments to Date 76 C Acknowledgements 80 Members of the Archives Task Force 80 Archives Task Force Project Team 81 Contributors and Respondents 82 D Archives Task Force Report annexes published online 94 31358.NAPIER.96pp 23/3/04 7:51 PM Page 3 Foreword The Museums, Libraries and Archives Our report also includes detailed recommendations on 3 Council (MLA) was invited by the ways to modernise public sector archives and to develop Department for Culture, Media and the skill sets and expertise of professional archivists in Sport to establish the Archives Task all areas. -
CONNECTED EARTH OUR TELECOMMUNICATIONS HERITAGE in Today’S Mobile, Digital World, Quality of Our Places
THE JOURNAL TJ 30 NIGEL LINGE NIGEL LINGE On why heritage matters Rugby Radio tuning coil in the Information Age gallery at the Science Museum. CONNECTED EARTH OUR TELECOMMUNICATIONS HERITAGE In today’s mobile, digital world, quality of our places. We recognise that gives the customer confidence in their latest telecommunications impacts while some of today’s achievements may offerings. Children visiting museums and become tomorrow’s heritage our existing galleries can be inspired to consider virtually every aspect of our daily heritage assets are also simply telecommunications as a future career and lives. Such is the pace of change irreplaceable. We believe in encouraging a hence, become the engineers of tomorrow. that we constantly seek news of wider involvement in our heritage, in order Indeed it is often easier to explain the basic the latest technological to ensure that everyone, both today and in principles of telecommunications when the future, has an opportunity to discover demonstrating or explaining heritage development that will transform their connection to those who have come equipment. smart phones into even smarter before.” phones, high definition televisions Heritage however, is fragile for it can be Similarly, English Heritage2 recognises that, easily destroyed through neglect or apathy into ultra high definition ones, 4G “the invention of telecommunications, from and once gone it is very difficult, if not networks into 5G networks and the telegraph to the Internet, has impossible, to recover. the Internet into the Internet of revolutionised society and has produced not Things. The companies that only its own heritage of structures and BT’s unique position artefacts but also new patterns of workplace Within the telecommunications industry, BT provide all of these products and and work styles. -
A Survey of Libraries in the Museums and Related Institutions of the Greater London Area; Together with a Study on the Evolution of the Museum Library in England
THE MUSEUM LIBRARY: A SURVEY OF LIBRARIES IN THE MUSEUMS AND RELATED INSTITUTIONS OF THE GREATER LONDON AREA; TOGETHER WITH A STUDY ON THE EVOLUTION OF THE MUSEUM LIBRARY IN ENGLAND Ann Elizabeth Borda Thesis submitted in the fulfilment of the requirennts of the degree of Doctor of Philosophy in Library and Information Studies University College London University of London November 1996 BIBL LOUD N UNIV. ACKNOWLEGEMENTS I wish to acknowledge the generous and kind assistance provided me by the eighty-four survey institutions discussed in this dissertation. I also wish to note the cooperative responses of those organisations I contacted during the course of my data gathering, but could not include in the final study. I am further grateful to my Department, both faculty and staff, and sincere thanks are especially extended to my supervisors; to Professor Robin Aiston for his many helpful comments, particularly on the historical aspects of the survey, and to Dr. I. C. Mdllwaine for her expert guidance and invaluable support in the overall supervision of my research. A special acknowledgement is also due to the following individuals whose assistance in the course of this study was notably generous and appreciated: Mrs. Anne Yandle, Librarian Emerita; Alex Roberts, Museums and Galleries Commission; Dr. Leonard Will and Alice Grant, Science Museum; Mary Shephard, National Maritime Museum; Christopher Mills, Natural History Museum; Peter Elliott, Royal Air Force Museum; Philip Abbott, Royal Arrnouries; Gillian Varley, National Art Library; Meg Duff, Tate Gallery; Bob Aspinall, Museum in Docklands; Elizabeth Graham, Weilcome Centre; Liz Oma of Orna/Stevens Associates; B.C.