Outdated Technology” • the FM Transmitter Network Is “Robust” • Shortwave Reaches a “Very Limited Audience” Shortwave Is an “Outdated Technology”
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A Brief History of Radio Broadcasting in Africa
A Brief History of Radio Broadcasting in Africa Radio is by far the dominant and most important mass medium in Africa. Its flexibility, low cost, and oral character meet Africa's situation very well. Yet radio is less developed in Africa than it is anywhere else. There are relatively few radio stations in each of Africa's 53 nations and fewer radio sets per head of population than anywhere else in the world. Radio remains the top medium in terms of the number of people that it reaches. Even though television has shown considerable growth (especially in the 1990s) and despite a widespread liberalization of the press over the same period, radio still outstrips both television and the press in reaching most people on the continent. The main exceptions to this ate in the far south, in South Africa, where television and the press are both very strong, and in the Arab north, where television is now the dominant medium. South of the Sahara and north of the Limpopo River, radio remains dominant at the start of the 21St century. The internet is developing fast, mainly in urban areas, but its growth is slowed considerably by the very low level of development of telephone systems. There is much variation between African countries in access to and use of radio. The weekly reach of radio ranges from about 50 percent of adults in the poorer countries to virtually everyone in the more developed ones. But even in some poor countries the reach of radio can be very high. In Tanzania, for example, nearly nine out of ten adults listen to radio in an average week. -
Analogue & Digital Radio Worldwide
Analogue & Digital Radio Worldwide MASS COMMUNICATION VIA SHORTWAVE HAS UNIQUE ADVANTAGES EVEN IN THE INTERNET AGE Global radio transmission via shortwave How it works Advantages of Shortwave Radio Simple, non-discriminatory reception Shortwave radio is radio transmission › Analogue or digital radio with of information on portable end user using shortwave radio frequencies, gen- one transmitter around the globe devices, independently from network erally 3.9–26.1 MHz (75–11 meter-band), › Audio transmission and data- providers and technical infrastructure: just above the medium-wave AM broad- transfer are possible These are the unique features which cast band. Shortwaves are directed at continue to make shortwave an impor- an angle into the sky can › Flexible transmission booking tant form of mass media. Therefore be reflected back to earth at great (daily, weekly, monthly or on- shortwave is an important platform for distances, beyond the horizon. Short- demand) public and commercial radio broad- wave radio is usually used for broad- › Reach thousands of people with casters as well as political and religious casting voice and music to shortwave one transmitter organisations to distribute their pro- listeners over entire continents or even grammes. larger areas. › Signals are hardly to disturb compared to Internet or satellite IONOSPHERE › Easy to receive with low-cost receivers SKYWAVE TRANSMITTER RECEIVER Shortwave stations of our partner service providers around the globe From Germany to the whole world › For providers of radio programmes intended for reception around the globe, Media Broadcast offers comprehensive consulting services and customised solutions for broadcasting signals via shortwave. We offer all required services- from one source, from IT-supported calculation of the desired transmission parameters and coordination of the suitable frequencies to technical broadcasting of the signals via our shortwave station in Nauen near Berlin. -
Digitalization of Radio Through DRM Standard on Mediumwave And
ISSN: 2277-3754 ISO 9001:2008 Certified International Journal of Engineering and Innovative Technology (IJEIT) Volume 3, Issue 9, March 2014 Digitalization of Radio through DRM Standard on Mediumwave and Shortwave Branimir Jaksic, Mile Petrovic, Petar Spalevic, Ratko Ivkovic, Sinisa Minic University of Prishtina, Faculty of Technical Sciences, Kosovska Mitrovica, Serbia University of Prishtina, Teachers College, Leposavic, Serbia areas where analog technology AM (amplitude modulation) Abstract— this paper work offers an overview of DRM was used. It is planned that AM should be replaced with standards used in digitization of radio on medium and short waves digital technology which is similar to technologies DAB and in the world. Firstly, it provides the raw characteristics of DRM DVB-T (all of these listed technologies use OFDM technology and its working principle, with a special focus on audio coding. After that, the state of DRM transmissions in modulation) [3]. The primary purpose of DRM technology is February 2014 is given. Also it gives an summary of radio stations for transfer of the audio content. With this basic purpose, which broadcast the program using DRM technology (country DRM also supports the transfer of some multimedia content and language transmission). Broadcasting areas of radio stations with lower transmission capacity: are also provided, as well as the number of active DRM - DRM text messages; frequencies by regions of the world, for each radio station - EPG (Electronic Program Guide); separately. Then, a map of DRM transmitters in the world is - Information text services (Journaline text based shown, with their main characteristics. information service); - Transmission frames (Slideshow); Index Terms—DRM, frequencie, radio channel, transmitters. -
The Radiogram
The August 2013 ~ Official Newsletter of the Portage County Amateur Radio Service, Inc. (PCARS) ~ Vol. 8 No. 8 ~ 2013 Officers ~ From the President In his inauguration speech on Friday, January 20, 1961, President John F. Kennedy said “And so, my fellow Americans: ask not what your country can do for you—ask what you can K3GP N8QE WB9LBI KD8JCY - - AE8YL do for your country.” That line has been quoted often. (The whole speech was actually very - - - good, you can read it at http://www.bartleby.com/124/pres56.html ) As PCARS continues to WB8LCD - Pelz grow, we are in a similar situation in that with all the programs and activities we have for the benefit of all members, we need more members Erica Bob HajdakBob - - to be involved with the operation of the programs Sandra Getty Bill FraedrichBill Tom Sly - - - and activities of the club. Right now, there are George Proudfoot - some people in the club who do an awful lot of the “heavy lifting” that has to be done to keep an President Year Trustee organization of our size moving. None of them 3 2 Year Trustee Treasurer do so grudgingly, they all do it as an act of giving 1 Year Trustee Vice President back to a great hobby that has given them untold ~ Meetings & Net ~ hours of fascination and enjoyment. I want to ask each one of you to look at all the activities of the club and see if there is not a spot Net at 8 pm where you could “plug in” and help out. -
Implementation Considerations for the Introduction and Transition to Digital Terrestrial Sound and Multimedia Broadcasting
Report ITU-R BS.2384-0 (07/2015) Implementation considerations for the introduction and transition to digital terrestrial sound and multimedia broadcasting BS Series Broadcasting service (sound) ii Rep. ITU-R BS.2384-0 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio- frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http://www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Reports (Also available online at http://www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. -
Portable Shortwave Receivers
Portable Shortwave Receivers ● Longwave, AM, FM and Shortwave ELITE SATELLIT ● VHF Air Band ● HD Radio Reception ● RDS Display ● Superior Sensitivity and Selectivity ● Dual Conversion Design ● Huge 5.7 Inch Backlit Display ● Drift-free Digital Phase Lock Loop ● Direct Frequency and Band Entry ● Single Sideband Synchronous Detector ● Selectable Bandwidths ● High Dynamic Range ● Dual Programmable Clocks ● Dual Event Programmable Timers ● Stereo Line Level Input ● Stereo Line Level Output ● Earphone Jack ● Separate Bass and Treble Controls ● Adjustable AGC: Fast or Slow ● Telescopic Antenna AM/FM/SW ● Battery (4xD) or Included AC Adapter ● Scan and Search ● 1700 Total Memories (500 alphanumeric) ● Deluxe Carry Bag The Elite Satellit is simply the finest full-sized portable in the world. The Elite Satellit is an elegant confluence of performance, features and capabilities. The look, feel and finish of this radio is superb. The solid, quality feel is second to none. The digitally synthesized, dual conversion shortwave tuner covers all long wave, mediums wave (AM) and shortwave frequencies. HD Radio improves audio fidelity and adds additional programming without a subscription fee. Adjacent frequency interference can be minimized or eliminated with a choice of three bandwidths [7.0, 4.0, 2.5 kHz]. The sideband selectable Synchronous AM Detector further minimizes adjacent frequency interference and reduces fading distortion of AM signals. IF Passband Tuning is yet another advanced feature that functions in AM and SSB modes to reject interference. AGC is selectable at fast or slow. High dynamic range permits the detection of weak signals in the presence of strong signals. All this coupled with great sensitivity will bring in stations from every part of the globe. -
World Receiver Yacht Boy 400 Pe Important Notice
WORLD RECEIVER YACHT BOY 400 PE IMPORTANT NOTICE NEED HELP? QUICK SETUP CALL OUR SHORTWAVE HOTLINE (But please read the rest of the manual later!) 1. Insert batteries or connect the included AC adaptor. If, after reading this owner’s manual, you need help learning to operate your YACHT BOY 400 PROFESSIONAL EDITION, call us toll free, Monday through Friday, 8:30 a.m. to 4:30 p.m., 2. Set the DX/LOCAL switch to DX (left side of radio). PST at: 1-800-872-2228 from the U.S. 3. Turn the SSB switch OFF (right side of radio). 1-800-637-1648 from Canada OWNER’S RECORD 4. Fully extend the telescopic antenna. This model is the GRUNDIG YACHT BOY 400 PROFES- 5. With the radio off, press and release the AM button once. SIONAL EDITION, herin after referred to as the YB400PE. The serial number is located on the sticker inside the battery compartment. Refer to this number whenever you call GRUNDIG 6. Immediately press and release the STEP button. regarding this product. “10KHz” now appears in the right side of the display, and will disappear in a few seconds. (See page 4 for more information about this procedure. 7. Turn the radio on by pressing the ON/OFF button. 1 TABLE OF CONTENTS SUBJECT PAGE GRUNDIG TOLL-FREE PHONE NUMBER………………………………………………………….............................. 1 TABLE OF CONTENTS………………………………………………………….……………………............................ 2 YOUR RADIO AT-A-GLANCE………………………………………………….……………………............................. 3 INITIAL SETUP…………………………………………………………………..……………………............................ 4 SUPPLYING POWER…………………………………………………………….……………………............................ 5 GENERAL RADIO OPERATION………………………………………………..……………………............................. 6-8 SHORTWAVE RADIO OPERATION…………………………………………...……………………............................... 9-10 STORING STATIONS INTO MEMORY………………………………………..…………………….............................. 11-12 USING CLOCK, ALARM, AND SLEEP TIMER FEATURES..............................……………………............................ -
New Zealand DX Times Monthly Journal of the D X New Zealand Radio DX League (Est 1948) D X April 2013 Volume 65 Number 6 LEAGUE LEAGUE
N.Z. RADIO N.Z. RADIO New Zealand DX Times Monthly Journal of the D X New Zealand Radio DX League (est 1948) D X April 2013 Volume 65 Number 6 LEAGUE http://www.radiodx.com LEAGUE NZ RADIO DX LEAGUE 65TH ANNIVERSARY REPORT AND PHOTOS ON PAGE 36 AND THE DX LEAGUE YAHOO GROUP PAGE http://groups.yahoo.com/group/dxdialog/ Deadline for next issue is Wed 1st May 2013 . P.O. Box 39-596, Howick, Manukau 2145 Mangawhai Convention attendees CONTENTS FRONT COVER more photos page 34 Bandwatch Under 9 4 with Ken Baird Bandwatch Over 9 8 with Kelvin Brayshaw OTHER English in Time Order 12 with Yuri Muzyka Shortwave Report 14 Mangawhai Convention 36 with Ian Cattermole Report and photos Utilities 19 with Bryan Clark with Arthur De Maine TV/FM News and DX 21 On the Shortwaves 44 with Adam Claydon by Jerry Berg Mailbag 29 with Theo Donnelly Broadcast News 31 with Bryan Clark ADCOM News 36 with Bryan Clark Branch News 43 with Chief Editor NEW ZEALAND RADIO DX LEAGUE (Inc) We are able to accept VISA or Mastercard (only The New Zealand Radio DX League (Inc) is a non- for International members) profit organisation founded in 1948 with the main Contact Treasurer for more details. aim of promoting the hobby of Radio DXing. The NZRDXL is administered from Auckland Club Magazine by NZRDXL AdCom, P.O. Box 39-596, Howick, The NZ DX Times. Published monthly. Manukau 2145, NEW ZEALAND Registered publication. ISSN 0110-3636 Patron Frank Glen [email protected] Printed by ProCopy Ltd, President Bryan Clark [email protected] Wellington Vice President David Norrie [email protected] http://www.procopy.co.nz/ © All material contained within this magazine is copy- National Treasurer Phil van de Paverd right to the New Zealand Radio DX League and may [email protected] not be used without written permission (which is here- by granted to exchange DX magazines). -
Hoppy Easter 2021
THE WAVES AND FIELDS OF THE RADIO ARTS W5SLA OZONE AMATEUR RADIO CLUB SINCE 1964 VOLUME'S 2021 V & VI http://www.coastalradio.org.uk/worldcoastal/slidellradio/slidell.htm Based on conversations with “Emile, thanks for the email. I'll try and answer some of your questions and give you some insight AA5UY, I found out about a into the workings of the old WNU. I retired from the Coast Guard on 1 October 1980. I did a little local with a history from the commercial painting but got tired of that and got my 3rd class license and went to work at WNU in station in Slidell, LA. I wrote to June of 1981. I was there until June of 1993. What a neat job. Getting paid to play. When I first got Mr. Beith and got this reply. there, we had about 20 Radio Officers and maybe 15 teletype workers.(I think they were known as IPOs - international printer ops). Received messages went directly to the printer ops for delivery. Business was good and most of the R/O's got 80 to 100+ messages per watch during the day. We SHOUT OUT TO had about 8 ops on duty during the day 4 during the evening and 1 on the mid. As the years went by Club Member our manpower shrunk and so did the traffic. In 1993 WNU sold out to KFS (in California) and remoted all operations to the west coast. I was the last operator on duty when they turned KD5PCK – Scott operations over to the new group. -
Airspy HF+ Discovery: It's a Whole New World of Radio
5HFHSWLRQRQORQJZDYHDQGPHGLXPZDYHIURPFHQWUDO(XURSHXVLQJWKH+)LVFRYHUSURWRWSHRXUWHV)HQX5DGLR 7605HYLHZV $LU6S+)LVFRYHU ,WVD:KROH1HZ:RUOGRI5DGLR /DUU9DQ+RUQ1)3:DQGDOH9DQ+RUQ:9+ ymottohasalwaysbeen:“Givemeashortwave gainsatyourlocalhamfesteamarketorjunkinthetrunk. radioandIcanmonitortheworld.”Buttheworld Itwaseventhehumbletransistorthatlaunchedthepub- 0ofshortwaveradiosisnotthesameonethatIstart- licsafetyscannermarket.Theystartedoutastunableanalog edwithinthehobbymanyyearsago. dialradios,thenmigratedtocrystal-controlledradios.With 7RUORUDRUFUVDWVDVVRFDWOFWUR- theinventionofintegratedcircuit(IC)chips,therevolution- icshasundergonequiteanevolutionoverthelast130years aryphaselockedloop(PLL)circuitwasbornthatpropelled orsothattheyhavebeenaround.Astechnologyhasad- thescannerindustrytoproducethehightechnologypro- vanced,sohasthecapability,spectrumcoverage,andutility grammablescannersweusetoday. ofthereceiversthatweuseinourradiomonitoringhobby. Itistheintegratedcircuitthathascreatedthepersonal 7DUWDORRWXEUDRVUVWDUWD computer/smartdevicesboom,amarketplacethatcontinues inthelate1950sandearly1960swiththeintroductionofra- evolveevenasthispieceisbeingwritten. diocircuitsthatusedtinychipsofgermaniumknownastran- sistors.Duetotemperatureconcerns,germaniumwassoon 6KKK,WV$OO$ERXWWKH65V replacedbysilicon-basedtransistors.Consequently,most majorradiomanufacturersstartedproducingtransistor-based OWWUWDOUDRDVEDURXVFW receiverdesignsthatdidn’tneedatubecheckeranymore. V8RUWFUFOVWDVWXWOWDWW Mostradioold-timers(includingtheauthors)stillhave termsoftwareradiorstsurfaced.Atrst,manyold-timers -
Wireless-World-1967
DOMESTIC TECHNIQUES OCTOBERThree Shillings 1967 Wireless World OCTOBER, 1917 or your circuit, with built-in ripp,11 assembled units courtesy of South London Electrical Equipment Co. Ltd. We've got the biggest little chassis in town SAVE TIME & MONEY with precision -built Keyswitch optional Keyswitch printed -circuit board withits I plug-in chassis. They're the ideal way to put a hand- mounting -hole grid backed by interconnecting cop- ful of circuitry together, and not necessarily a small per strips, you have an infinite variety of circuit and handful either. Even relays and small motors can be layout possibilities. And all this for as little as 15/- a mounted in these versatile units. Here's your choice time, from Keyswitch Relays Ltd, 120 Cricklewood of mounting space: Lane, London NW2; telephone 01-452 3344; telex Keyswitch P304S - 51i n3 262754. Keyswitch P304 (illustrated) - 71in3 Keyswitch 2P304 (with 44 -way connectors) - 15in3 milkilTMITVITCH1RELAYS Whether you use your own mounting board, or the WW -001 FOR FURTHER DETAILS -79 Editor -in -chief: Wireless World W. T. COCKING, F.I.E.E. Editor: H. W. BARNARD ELECTRONICS, TELEVISION, RADIO, AUDIO Technical Editor: T. E. IVALL OCTOBER 1 9 6 7 Editorial: B. S. CRANK 463 What is the Electronics Industry? F. MILLS 464Domestic Receiver Techniques G. B. SHORTER, B.sc. 472Stereo Signal Simulator by D. E. O'N. Waddington 476 Drawing Office: Colour TV Standards Converter H. J. COOKE 482 Semi -stabilized D.C. Supply by G. W. Short 483German Colour Television Starts Proauction: 488 Wireless World Digital Computer -3 D. R. BRAY 496 New Measurement Techniques Advertisements: 500 Colour TV Circuit Round -up by T. -
British DX Club
British DX Club Africa on Mediumwave and Shortwave Guide to radio stations in Africa broadcasting on mediumwave and shortwave September 2021 featuring schedules for the A21 season Africa on Mediumwave and Shortwave This guide covers mediumwave and shortwave broadcasting in Africa, as well as target broadcasts to Africa. Contents 2-36 Country-order guide to mediumwave and shortwave stations in Africa 37-40 Selected target broadcasts to Africa 41-46 Frequency-order guide to African radio stations on mediumwave Descriptions used in this guide have been taken from radio station websites and Wikipedia. This guide was last revised on 14 September 2021 The very latest edition can always be found at www.dxguides.info Compiled and edited by Tony Rogers Please send updates to: [email protected] or [email protected]. Thank you! Algeria Enterprise Nationale de Radiodiffusion Sonore The Entreprise Nationale de Radiodiffusion Sonore (ENRS, the National Sound Broadcasting Company, Algerian Radio, or Radio Algérienne) is Algeria's state-owned public radio broadcasting organisation. Formed in 1986 when the previous Algerian Radio and Television company (established in 1962) was split into four enterprises, it produces three national radio channels: Chaîne 1 in Arabic, Chaîne 2 in Berber and Chaîne 3 in French. There are also two thematic channels (Radio Culture and Radio Coran), one international station (Radio Algérie Internationale broadcasting on shortwave) and many local stations. The official languages of Algeria are Arabic and Tamazight (Berber), as specified in its constitution since 1963 for the former and since 2016 for the latter. Berber has been recognised as a "national language" by constitutional amendment since 8 May 2002.