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Vol. 1`, No. 6 June 1996 itoring The Full- Spectrum Radio Magazine A Phlication of Grove Enterprises, Inc. INSIDE: A huge list of agencies and frequencies to monitor at the XXVI Olympiad! Eth Wl An i Voic "F Ma poradic sum n 11 33932 74654 8 Printed in the United States www.americanradiohistory.com Ca ture th &out® Reaction Tune ® brings you all the action. Whether it is police, fire, commercial or just everyday communications monitoring, the Scout will bring you closer to the action. The Scout will not only capture the frequency, but it automatically tunes the receiver to that frequency at the same time; (see receivers appl. below). Let the Scout Reaction Tune your way into the world of communications. FEATURES Records up to 400 unique frequencies in memo ry Records up to 255 hits on each frequency in memory. 10MHz - 1.4GHz single frequency range. Records frequencies automatically with Patented Digital Auto Filter & Digital Auto Capture. Reaction Tune the AOR AR8000, AR2700, ICOM R7000, R7I00, R9000, Radio Shack Pro 2005 /2006 with 05456 installed, and the Radio Shack Pro 2035/2042 with 0S535 installed. All frequencies are automatically saved until deleted. I Interface to a PC with the optional OPTOLINX or CX12AR for data download. Custom 10 digit LCD display with automatic EL backlighting. 16 segment RF signal strength bargraph. Pager style vibrator for discreet recording. Distinctive beeper indicates frequency detection. Rapid charge NiCads with AC charger supplied; 2 hour recharge and 8 -10 hour battery discharge. Frequency Range: 10MHz - 1.4GHz 41) Operating Time: 8 - 10 hours 50 <2:1 Input Amplifier: Ohm vswr Power 2VDC 1 Amp wall plug adapter for rapid - Using the optional SAC8000 is a snap -Just Sensitivity lmV 30MHz 900MHz charging. 6VDC 130mA minimum operating plug and play. SAC8000 includes cable, back á Maximum Input + 1 5dBM, 50 milliwatts power required. AC90 adapter supplied. panel with slot, and velcro attachments. 4/1 Display 10 digit LCD with backlight Factory Direct Order Line: 1-800-327-5912 MADE 0111l91119l %r11 !"/"lLAL 110"1* IN h./I.ii% 1 % %#'/ ` 5821 NE 14th Avenue Ft. Lauderdale, FL 33334 Visa, MasterCard, C.O.D. Prices and Specifications are subject to change without notice or obligation USA All specials are subject to change without notice or obligation. Internet: http: //www.optoelectronics.com Tel: 954.771.2050 Fax: 954.771.2052 www.americanradiohistory.com C O N T E N TS )M.® nitoring Times Vol. 15, No.6 June '' 996 Broadcasting War in Ethiopia 20 By Harald Kuhl The Horn of Africa has long been a hotbed of clandestine broadcasters titoring voicing the views of various opposition parties. The airwaves have been Titt7es= calmer since 1991 when a coalition party began to rule in Ethiopia. Since á'he oh mh;: Mom lmri nr 1995, however, the Voice of Oromo Liberation has begun broadcasting dhallen.r again, this time from a site outside Ethiopia which is widely audible to DXers. '"X"'"` .. Why now and why from this undisclosed location? Harald Kuhl talks with Taye Teferra, European coordinator of the station, in this revealing interview. Cover Story "Hot listening in "Hot- lanza" By Michael Martin and Roger Cravens J my 19th to August 4th, all eyes and ears will be on Atlanta for the run- ning of the Centennial Olympic Games. If you are one of the thou- sands of visitors expected to visit FM /TV DX 101 24 Atlanta and the other venues in the By Loyd Van Horn Southeast, welcome to the bestscan- ning you have ever experienced! The younger generation Van Horn makes his writing debut in this Although sensitive communica- "introduction course" to FM and TV DXing. Though various types of tions such as security for athletes and dignitaries will be using scrambled propagation conducive to long -range reception occur throughout the year, circuits, probably no daily activity summertime is traditionally one of the best times to enjoy this aspect of around the region will be "routine" DXing, especially when summer storms make AM listening difficult. How- during the Olympics. So that you ever, as Loyd discovered, it takes more than just fancy equipment to produce won't miss a minute of monitoring, results worth bragging about. we've prepared some extensive fre- quency lists so you can program your scanner for your favorite agencies - beginning with your arrival at the airport. Our cover shows Andraz Vehovar of Slovakia on the challenging new kayak venue - Tennessee's Ocoee River. Photo by Harry Baughn. www.americanradiohistory.com DEPARTMENTS Letters 4 Federal File 82 Reviews: Communications 6 Federal Surveillance Freqs Grove Expo Update 18 Satellite TV 84 Beginner's Corner 28 Satellite Broadcasting Guide Going Down (LF) Experimenters Workshop 86 Scanning Report 30 Cool Ways to Design Circuits -III Scanning on Line Skylink 88 Utility World 34 Wireless Computer ¡ANS FBI on HF Computers & Radio 90 Readers have expressed a great deal Shortwave Broadcasting 38 Message Tracker of curiosity about the Radio Shack OS1. Report 42 Net News 92 DX -394 shortwave receiver. Flow does English Lang SW Guide 43 Audio on the Internet 67 this tabletop, priced under $400, stack Club Circuit What's New 93 Propagation Conditions 68 up against the classics? See Magne's Review: Grove TUN -4A Below 500 kHz 70 on page 98 for the bottom line. Magne Tests 98 review Surfing for Longwaves Parnass revisits the Uniden Radio Shack DX -394 American Bandscan 72 to pass along to Scanning Equipment 100 BC9000XLT (p.100) Exotic TV DX additional mods and tips Mods & Tips for BC9000XLT readers some Limits 74 Outer Antenna Topics 102 acquired over a year of operation. Micro Pirates Widespread of common The Kite -Supported Antenna Addressing a number On the Ham Bands 76 K.I.S. Radio 106 reception requirements, the Grove Amplitude Modulation CB- Ultimate Frugal Radio TUN -4A is not only an antenna Events Calendar 77 Special Ask Bob 108 preselector /amplifier, but provides "a DeMaw's Workbench 78 More on Current Flow complete antenna system control unit." Tune a Random-Length Antenna Stock Exchange 110 See page 96 for the review. Plane Talk 80 Closing Comments 112 Reader's Corner The State of the Union and MONITORING TIMES (ISSN: 0889 -5341) is published monthly Subscription Rates: $23.95 in US; $48.50 Canada air; US funds. Label indicates last by Grove Enterprises, Inc., Brasstown, North Carolina, USA. $85.95 foreign air elsewhere, Copyright© 1996. Second class postage paid at Brasstown, NC, and issue of subscription additional mailing offices. Short excerpts may be reprinted with appropriate credit. Complete articles may not be reproduced without Postmaster: permission. Send address changes to Monitoring Times, P.O. Box 98, Brasstown, NC 28902 -0098. Address: P.O. Box 98, 7540 Highway 64 West, Brasstown, NC 28902 -0098 Disclaimer: Monitoring Times makes an effort to ensure the information it Telephone: (704) 837 -9200 While publishes is accurate, it cannot be held liable for the contents. The reader Fax: (7041 837 -2216 (24 hours) assumes any risk for performing modification or construction projects Internet Address: www.grove.net or mt @grove.net; published in Monitoring Times. Opinion or conclusions expressed are not Editorial: mteditor @grove.net necessarily the view of Monitoring Times or Grove Enterprises. Unsolicited manuscripts are accepted. SASE if material is to be returned. Owners Editorial Staff Bob and Judy Grove Frequency Manager Gayle Van Horn Magne Tests ... Lawrence Magne Publisher Frequency Monitors David Datko, Loyd Van Horn Communications .... Larry Miller What's New? .... Larry Miller Bob Grove, WA4PYQ Program Manager Jim Frimmel Beginner's Corner T.J. Arey, WB2GHA Skylink ....Wayne Mishler, KG5BI Editor K.I.S. Radio Rich Arland, K7YHA Scanning Equipment .... Bob Parnass, AJ9S Satellite TV .... Ken Reitz, KS4ZR Rachel Baughn, KE4OPD Plane Talk Jean Baker, KIN9DD Scanning Report Richard Barnett Antenna Topics ....W. Clem Small, KR6A Bandscan .... Doug Smith, W9WI Art Director Computers and Radio . John Catalano American Logs .... Gayle Van Horn Below 500 kHz . Kevin Carey, WB2QMY SW Broadcast John Bailey Corner .... Gayle Van Horn Experimenter's Wkshp . Bill Cheek QSL World .... Larry Van Horn, N5FPW Advertising Svcs. Propagation . Jacques d'Avignon Utility Limits .... George Zeller DeMaw's Workbench . Doug DeMaw, WI FB Outer Beth Leinbach Digital Digest Bob Evans Correspondence to columnists should be (704) 389 -4007 Federal File . John Fulford, WA4VPY mailed c/o Monitoring Times via e-mail Net News . Bill Grove (mt @grove.net) or via post office. Any Business Manager SW Broadcasting . Glenn Hauser request for a personal reply should be Kelly Davis, KE4TAM On the Ham Bands . Ike Kerschner, N3IK accompanied by an SASE. www.americanradiohistory.com Now The Company That Takes ou Around The World Lets You ae World Ar The Drake SW8 - Finally, Professional Desktop Performance In An Affordable, Portable World Band Shortwave. The company that has teen Drake SW8 includes many of technology and portability. setting the standards in oremium- the same features that have made The Drake SW8. quality world band shortwave Drake a perennial favorite of To order your SW8 direct, performance now puts top -of- experts - superb audio, versatility, for more information, or for the features -line and technology and the unique combination of the dealer nearest you call: at your fingertips with the professional quality and functional 1- SW8...wherever you want to simplicity. So tune in the world 800 -968 -7795 take it. Designed for both desktop and get the best of all worlds - use and easy portability, the quality and affordability, desktop Ge, It Firsthand With Drake World Band. R.L. Drake Company P.O. Box 3006 Miamisburg, OH 45343 U.S.A. C1995 The R L Drake Company www.americanradiohistory.com L E T T E R S "Herr Wullenweber was kid- am pleased to see that you obviously believe napped by the Russians at the that it is an issue worthy of such coverage.
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  • Antenna System Re-Visited Part 1: the G5RV on 20 Meters

    Antenna System Re-Visited Part 1: the G5RV on 20 Meters

    The G5RV Antenna System Re-Visited Part 1: The G5RV on 20 meters L. B. Cebik, W4RNL Louis Varney G5RV was and is not an antenna, that is, an array of elements. The antenna he designed named after his call sign, the ‘G5RV’ is an antenna system including a radiating element and a length of RF Transmission Line designed to present a "correct" impedance at a design frequency. The 1984 RADCOM Version of the Antenna System The most familiar part of the system is the wire: a center-fed doublet 102' long. Actually, Varney calculated the length to be 3/2 wavelengths long at 14.15 MHz using a long- standing equation: The letter 'n' is the number of half wavelengths in the antenna. The result is 102.57' or 31.27 m. It is interesting that Varney notes in his 1984 article in RADCOM that he can shorten the wire to 102' or 31.1 m, since the entire system will be handled by an antenna tuning unit (or ASTU--antenna system tuning unit--as Varney preferred). (The entire 1984 article has been reprinted in Erwin David, G4LQI, HF Antenna Collection, published by RSGB in 1991. In the G5RV article, the author makes reference to his initial 1966 presentation of the basic idea. An adapted version appears in The ARRL Antenna Compendium, Vol. 1, 1985.) However, we conventionally sketch the G5RV antenna system as in Fig. 1. The center-fed doublet has a section of parallel transmission line extending from the radiating wire feedpoint to a junction with the "main" feedline.