DOCSLIB.ORG

Crystal Radio Projects Listening to Longwave ARRL RFI Book

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Crystal Radio Projects Listening to Longwave ARRL RFI Book review a new edition. Such is the Crystal Radio ARRL RFI Book 36th edition of the ARRL Repeater Our high-tech era brings Directory for 2007-2008. No, don’t Projects convenience at the expense of yawn! What’s ho-hum about the As technology speeds ahead at radio interference. Power lines, book with the greatest potential of a head-spinning pace, many radio telephones, computers, lighting actually getting new hams on the experimenters delight in returning fixtures, electronic accessories, air? to the days of old, marveling once home appliances, TV sets, radio again at the reception of signals equipment and other electrically- during a simpler time. operated devices are a limitless Crystal radio sets require no source of unwanted signals. external source of power; they de- The most comprehensive rive their earphone volume purely volume devoted to curing radio from the signal voltage itself. Me- frequency interference (RFI) prob- dium wave AM broadcasters are the lems is unquestionably this second most common targets for reception, edition of the formidable RFI Book but shortwave broadcasters, CB from the American Radio Relay stations and even aircraft commu- League (ARRL). nications can be heard as well. Publishers of the Xtal Set Society Newsletter periodically assemble articles and projects into Key chapters include: · Who is on the air, and when book form; their latest assemblage and where to listen to longwave of volumes 12 and 13 is such a communications. publication. · Transmitters (lowfer), receivers, 135 well-illustrated pages converters and antennas for contain instructional details on longwave. The bulk of the Repeater · Longwave listening tips for Directory – which comes in a building your own headset and cat’s beacon hunters, logging your whisker crystal, simple one-tube catches, and equipment. condensed, pocket size or the new, projects, amplifiers, coil winding, · Unusual users of the longwave large-print desktop version – is paper-box radios, shortwave crystal spectrum – navigation systems made up of periodically updated sets, crystal detectors, antenna rec- and military users. listings of active repeaters, along ommendations and much more. · Monitoring the sounds of nature with all the pertinent information to – Whistlers, Tweeks, Dawn’s access each repeater. The repeater And if you would like a head Chorus and other atmospher- start, the Society also offers do-it- ics. listings are divided into frequency range (or repeater type, such as yourself kits. · Background information on nav- More than 300 pages of profes- APCO 25 or Echolink), then by Crystal Radio Projects Vol- igation beacons, time stations, sionally-illustrated articles contain longwave broadcasters and state regions, for quick look-up. umes 12 and 13 is available for advice and construction details for NAVTEX weather broadcasts. But that’s not all. In plain, $15.95 plus $4.95 shipping from minimizing interference for virtu- · Transmit and Receiving equip- practical language, chapters give the Xtal Set Society, PO Box 3636, ment for the Lowfer license free ally any RFI challenge that arises. an invaluable overview of good Lawrence, KS 66046. Phone them experimenter’s band. And, if you’re interested in radio operating practices, repeater and at (405) 517-7347 or visit their · Reference section that includes direction finding (RFI) to track books and periodicals; clubs, emergency message handling, band website at www.midnightscience. down that offending signal, there’s groups and organizations; man- plans, repeater lingo and hints, and com. a chapter on building a variety of ufacturers and distributors of the names and addresses of regional – Reviewed by Bob Grove RDF antennas as well. longwave related products; and frequency coordinators. useful internet websites. This latest volume contains As ARRL Chief Executive This is a great book for the a reprint of the FCC Interfer- Listening to Officer David Sumner K1ZZ says, beginner who wants an overview of ence Handbook, a contact list for “Our service benefits from you monitoring the longwave spectrum, manufacturers of home electronics Longwave actively using your license, and the Most Monitoring Times read- and for oldtimers looking for a new equipment, and a resource guide for systems listed herein provide a way ers are familiar with the shortwave band to challenge. commercial RFI filters. for you to do so.” spectrum, but many of you are Listening to Longwave - The The exhaustive RFI Book is The large-print directory, not familiar with the spectrum World Below 500 kiloHertz is available for $29.95 plus shipping available for the first time by below the AM broadcast band published by Universal Radio Re- from the ARRL.* popular request, is $15.95 from the – the longwave radio spectrum. search. It is perfect bound, with a – Reviewed by Bob Grove ARRL.* MT Below 500 columnist, Kevin color cover and has 98 pages. The traditional pocket-sized Cary, WB2QMY, has written a You can order your copy of version is also available at $10.95. nontechnical introduction to the this excellent beginner’s guide from Repeater Or call and ask about the TravelPlus fascinating “basement band” of Universal Radio, Inc., 6830 Ameri- Directory for Repeaters CD, which combines the radio spectrum. Listening to cana Parkway, Reynoldsburg, OH Some publications from the the repeater listings in a map-based Longwave - The World Below 500 43068-4113 (800-431-3939) or on American Radio Relay League software which can be used with kiloHertz is an up-to-date look into their website at www.universal- are such stand-bys that we don’t GPS. the interesting world of radio below radio.com. Order book number fully appreciate the breadth of – Reviewed by Rachel Baughn 500 kHz. 0024, $6.95 plus shipping. information they contain until we – Reviewed by Larry Van Horn 74 MONITORING TIMES June 2007 published in 2005. On the Bench continued from page 71 ARRL Periodicals on The book’s com- CD-ROM plete title is: Music ❖ Conclusion The American Radio Relay League has Radio - The Great DRM provides exciting listening and DX- released their 2006 anthology of their popu- Performers and Pro- ing opportunities. While using a PC may not be lar journals on a compact, fully searchable grams of the 1920s convenient, at least we can hear and sample DRM CD-ROM. Every word and photo published Through Early 1960s. broadcasts now. I encourage shortwave radio hob- throughout the year is included for QST – the I met the author, Jim byists to try DRM, especially since the shareware official membership journal of the ARRL; NCJ Cox, at an OTR con- DReaM is free, it is possible to receive a 12 kHz – National Contest Journal; and QEX Forum vention in El Segundo, audio signal without modifying a receiver, and for Communications Experimenters. CA, three years ago. simply because it is fun. Using the Adobe Acrobat engine you can Jim is not only a very DRM reception is not always 100 percent. search the full text of every article by entering pleasant man, but he is At times the audio will drop out at exactly the titles, call signs, names – almost any word. a prolific author of OTR books. They include wrong time. Or, at times, the audio sounds, to me, You can see every word, photo (including books about radio soap operas, crime fighters, tinny, somewhat like cell phone audio. However, color images), drawing and table in technical audience participation shows, and the fading these are not deterrents. These simply present and general interest features, columns and of the golden age of radio into the early stages challenges. product reviews, plus all advertisements. And of what we know now as broadcast program- Why would someone endure, at times, drop you can even print what you see, or copy it to ming. outs, tinny audio, the need to download software, other applications. Web links appearing in the Music Radio is basically a history of the need to use a PC? Because the same person article can be used to launch your Web browser music as heard on American radio. The names will get out of bed at 2a.m. to chase that elusive to view additional information. of many familiar artists and groups are found DX. in the book, as well as sponsors, dates and times of broadcasts, and the networks carrying ******************************************** the programs. Not only will you find history, Kraig Krist, Manassas, VA some anecdotes, and insider viewpoints in the KG4LAC – Amateur radio book, but Jim introduces each subject with his KDX4KWK – All-Band Radio Monitor informed and expert analysis. 1 http://www.drm.org/consortium/history. I will list the chapters here so that the php variety of musical themes he covers will be 2 http://www.drm.org better understood: The Bell Telephone Hour; 3 http://www.drmrx.org/receiver_mods. The Big Bands; The Bing Crosby Show; The html Chamber Music Society of Lower Basin Street; 4 455 kHz IF to 12 kHz adapter available Cities Service Concerts; The Classics; The from http://www.sat-schneider.de/DRM/ Contests; The Disc Jockeys; The Fred Waring DRM.htm See Universal DRM - miniature Show; Grand Ole Opry; The Horse Operas; mixer unit The House Bands; The Hummert Musicales; 5 Sourceforge website, location of much The Kate Smith Show; The Railroad Hour; shareware including DReaM, http://drm. The Sacred Singers; The Vocalists; The Voice In addition to the features above, ARRL sourceforge.net of Firestone; and Your Hit Parade. Periodicals on CD-ROM includes source code 6 Sourceforge DRM compile instructions Music Radio: The Great Performers and for software projects and PC board etching pat- http://drm.sourceforge.net/installation. Programs of the 1920s through Early 1960s terns. And the 2006 version also includes Sec- html by Jim Cox is published by McFarland & tion News and ARRL Contest Results – with 7 DReaM.exe download site http://drm.
Load more

Recommended publications
  • AM Loop Antennas AM LOOP ANTENNAS Introduction
    AM Loop Antennas AM LOOP ANTENNAS Introduction An AM loop antenna is one of the true marvels of electronics. Requiring no power, it takes advantage of the resonant properties of an inductor and a capacitor connected in parallel to receive weak AM stations. The "loop" part of the antenna is the inductor, and the tuning capacitor makes it resonate at a desired frequency. As a boy in Abilene in 1967, I discovered the basic principle of the loop antenna. By removing a relatively small spiral loop in my five tube table radio, and substituting a much larger loop salvaged from an older radio, I could receive my favorite station - KLIF from Dallas better. I hid the loop in a cardboard holder featuring the logo of a favorite rock band, and enjoyed many hours of good listening. Lacking the mathematical background to understand antenna theory - I could not take the concept to the next phase: designing my own loop. Nevertheless, the spiral loop - combined with the antenna section of the radio's tuning capacitor - formed a very good loop antenna. I understood quite well that the bigger the loop, the more stations I could receive. The schematic diagram of an AM loop antenna is shown below. It consists of an inductive winding, which is supported on a frame, and a variable tuning capacitor that can be salvaged from a junk radio. The inductive winding consists of a primary, which forms a resonant network with the tuning capacitor, and a secondary "sense" winding that can be connected to a radio. In practice, however, the sense winding is not needed if the loop antenna can be placed near the radio - mutual coupling will take place with the antenna in the radio.
    [Show full text]
  • Sue: Hear Hidden Satell Rals Litow Filters Im Pro Reception Shor Ave Listeni Ij)Ginia to Zambia World Band Cente °Fl1uo O Iü S
    o t is-sue: Hear Hidden Satell Rals litow Filters Im pro Reception Shor ave Listeni ij)ginia to Zambia World Band Cente °fl1Uo O iü s Plus: CB, S. EJT Pg:DOUDC43'- Ham Radio; 0C2',.FC9g I . lit LAST WORD ERFORLNCE THE ICOM IC -781 HF TRANSCEIVER TRANSMIT 14.195.134 .. r.. = PHONES t; R IC -781 14.205.00 DELAY DRIVE NB LEVEL BIK.WIDiH GC .-_ A , : '.DMP .IB R, GAIN MCROPHONE- 1[01-O45 AMU St7h Sv( Nothing compares to the captivating Whether you aspire to DX, contest or experience of operating the finest transceiver enjoy legendary performance, the IC -781 on the market, the IC -781. The exhilaration inspires countless hours of devoted of operating the IC-781 is matched only by attention. Backed by a service commitment the luxury of its crystal clear communications. second to none, four factory service centers Designed for rigorous operation, the and a one-year factory warranty, the IC -781 IC-781 is the result of extreme dedication, characterizes Icom's dedication to excellence. exceptional craftmanship precision and V I, Miki L: m ui: lti: :iÌ- 1. till, .,,,!t 1li.,1+. engineering. The IC -781 fuses tre perfect Hotline at 1-800-999-9877. blend of features such as driving power, CORPORATE HEADQUARTERS: ICOM America, Inc.. 2380 -116th .Ave. N.E.. Bellevue, WA 98004 incredible clarity, a Multi -Function CRT CUSTOMER SERVICE HOTLINE (206) 454.7619 CUSTOMER SERVICE CENTERS: 3150 Premier Drive, Suite 126. Irving. TX 75063 Display, Spectrum Scope and Icclm's 1777 Phoenix Parkway. Suite 201. Atlanta.
    [Show full text]
  • Tektronix: Glossary Video Terms and Acronyms
    Glossaryvideo terms and acronyms This Glossary of Video Terms and Acronyms is a compilation of material gathered over time from numer- ous sources. It is provided "as-is" and in good faith, without any warranty as to the accuracy or currency of any definition or other information contained herein. Please contact Tektronix if you believe that any of the included material violates any proprietary rights of other parties. Video Terms and Acronyms Glossary 1-9 0H – The reference point of horizontal sync. Synchronization at a video 0.5 interface is achieved by associating a line sync datum, 0H, with every 1 scan line. In analog video, sync is conveyed by voltage levels “blacker- LUMINANCE D COMPONENT E A than-black”. 0H is defined by the 50% point of the leading (or falling) D HAD D A 1.56 µs edge of sync. In component digital video, sync is conveyed using digital 0 S codes 0 and 255 outside the range of the picture information. 0.5 T N E 0V – The reference point of vertical (field) sync. In both NTSC and PAL CHROMINANCE N COMPONENT O systems the normal sync pulse for a horizontal line is 4.7 µs. Vertical sync P M is identified by broad pulses, which are serrated in order for a receiver to O 0 0 C maintain horizontal sync even during the vertical sync interval. The start H T 3.12 µs of the first broad pulse identifies the field sync datum, 0 . O V B MOD 12.5T PULSE 1/4” Phone – A connector used in audio production that is characterized -0.5 by its single shaft with locking tip.
    [Show full text]
  • Questions of the CCIR (Düsseldorf, 1990)
    This electronic version (PDF) was scanned by the International Telecommunication Union (ITU) Library & Archives Service from an original paper document in the ITU Library & Archives collections. La présente version électronique (PDF) a été numérisée par le Service de la bibliothèque et des archives de l'Union internationale des télécommunications (UIT) à partir d'un document papier original des collections de ce service. Esta versión electrónica (PDF) ha sido escaneada por el Servicio de Biblioteca y Archivos de la Unión Internacional de Telecomunicaciones (UIT) a partir de un documento impreso original de las colecciones del Servicio de Biblioteca y Archivos de la UIT. (ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版（PDF版本）由国际电信联盟（ITU）图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union XVII A.R DUSSGLDORF 21.5 - 1.6 1990 CCIR XVIIth PLENARY ASSEMBLY DUSSELDORF, 1990 INTERNATIONAL TELECOMMUNICATION UNION QUESTIONS OF THE CCIR, 1990 VOLUME XV SG 1 SPECTRUM MANAGEMENT TECHNIQUES SG 12 INTER-SERVICE SHARING AND COMPATIBILITY SG 5 RADIO WAVE PROPAGATION IN NON-IONIZED MEDIA SG 6 RADIO WAVE PROPAGATION IN IONIZED MEDIA SG 7 SCIENCE SERVICES INTERNATIONAL RADIO CONSULTATIVE COMMITTEE Geneva, 1990 CCIR 1. The International Radio Consultative Committee (CCIR) is the permanent organ of the International Telecommunication Union responsible under the International Telecommunication Convention "... to study technical and operating questions relating specifically to radiocommunications without limit of frequency range, and to issue recommendations on them../7 (Inter­ national Telecommunication Convention, Nairobi 1982, First Part, Chapter I, Art.
    [Show full text]
  • Build Your Own Low-Power Transmitters: Projects for the Electronics Experimenter
    Build Your Own Low-Power Transmitters Projects for the Electronics Experimenter This Page Intentionally Left Blank Build Your Own Low-Power Transmitters Projects for the Electronics Experimenter Rudolf F. Graf William Sheets Boston Oxford Auckland Johannesburg Melbourne New Delhi Newnes is an imprint of Butterworth–Heinemann. Copyright © 2001 Rudolf F. Graf and William Sheets A member of the Reed Elsevier group All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or trans- mitted in any form or by any means, electronic, mechanical, photocopying, record- ing, or otherwise, without the prior written permission of the publisher. Recognizing the importance of preserving what has been written, Butterworth– Heinemann prints its books on acid-free paper whenever possible. Butterworth–Heinemann supports the efforts of American Forests and the Global ReLeaf program in its campaign for the betterment of trees, forests, and our environment. Library of Congress Cataloging-in-Publication Data Graf, Rudolf F. Build your own low-power transmitters : projects for the electronics experimenter / Rudolf F. Graf, William Sheets. p. cm. ISBN 0-7506-7244-7 (alk. Paper) 1. Radio—Transmitters and transmission—Design and construction— Amateurs’ manuals. 2. Low voltage systems—Designs and construction— Amateurs’ manuals. I. Sheets, William. II. Title. TK6561 .G67 2001 621 .384’131—dc21 2001030550 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. The publisher offers special discounts on bulk orders of this book. For information, please contact: Manager of Special Sales Butterworth–Heinemann 225 Wildwood Avenue Woburn, MA 01801-2041 Tel: 781-904-2500 Fax: 781-904-2620 For information on all Newnes publications available, contact our World Wide Web home page at: http://www.newnespress.com.
    [Show full text]