SPRING SUMMER 1977 $1.35 02003 EN :ommunicationsMN INCLUDING THE COMPLETE NIa Ett RLD AM FM TV SHORTWAVE wigip .7.-"FtEC . AUIO CO 1,1C National Radio Company HRO-600 communications receiver Where and When to - Hear Overseas English Language Broadcasts :test Bands for Around the Clock Listening Eavesdropping on the Utilities Joining a Radio Club Plus- How to Buy a SW Receiver How to pile up a QSL card collection L, How to tune in the police, fire fighters, aeronautical, national weather service, ship-to-shore, radio paging ysterns and more ! By the Editors of ELEMENTARY ELECTRONICS sr r _r_r_é.rc7rr itJA Jr.f!rAgMIOJ1zlÇfqalHnaW1ilAM 1IRT 11.Atiti 4;pw` "4Og5/OE .i q}+'TO }vOiÿ Y1Q q -.717 ßq7` 1.4 CIE's FCC LICENSE WARRANTY OF SUCCESS CIE warrants that when you enroll in any CIE course which includes FCC License preparation, you will, upon successful completion of the course and the FCC License material, pass the Government FCC Examination for the License for which your course prepared you. If you do not pass the appro- priate FCC Examination, you will be entitled to a full refund of an amount 4 equal to the cash price for CIE's "First Class FCC License Course," No. 3. This warranty will remain in effect from the date of your enrollment o1 to 90 days after the expiration o of the completion time allowed for your course. <. x® ¡xJ 7É7` qt-rV) C/-v\.) C \ )C2u\)C/ m cak.) C /rtyArc4=-J CIE's Warranty says a lot to you! A lot about CIE's FCC License training program, designed by experts to give you the best in Electronics programs...and a lot more about our school. home -study education. Send for FREE school catalog Our FCC License Warranty means just what it says. If you open to people enroll in any CIE career course that includes FCC License pre- Discover more about the career opportunities paration and successfully complete your training ... you'll pass with electronics training. Learn how CIE career courses can you for the Government FCC exam. We warrant that you'll succeed. help you build new skills and knowledge and prepare CIE can make this no- nonsense warranty because we're con- a meaningful, rewarding career. Whether you are just starting fident of our in -depth career training programs. You see, we out in Electronics or are a college- trained engineer in need of designed have specialized exclusively in Electronics education -by -mail updating, (or anywhere in between), CIE has a course for more than 40 years. Just Electronics. And, the courses we for you. Send today for our FREE school catalog and booklet on offer today are the result of these years of teaching experience FCC License information. For your convenience, we will try and proven methods of training. to have a representative call to assist in course selection. Mail Our courses are thorough ... written in easy -to- understand reply card or coupon to CIE ... or write to CIE (include language ... so you can progess at your own learning pace, name and date of this publication), 1776 East 17th Street, at home, in your spare time. And, there are never any class- OH 44114. Do it TODAY. rooms to attend. Cleveland CIE courses challenge your thinking ... help you develop G.I. Bill benefits your understanding of important electronics theories and ap- All CIE career courses are approved for educational benefits plications ... enable you to learn new skills and knowledge. under the G.I. Bill. If you are a Veteran or in service now, If an FCC "ticket" is part of your career goal, you'll have check box for G.I. Bill information. to pass a tough licensing exam administered by the Federal Communications Commission (an agency of the U.S. Govern- r ment). And you'll be prepared. Based on a series of continuing Cleveland Institute of Electronics, Inc. CIE 1776 East 17th Street. Cleveland, Ohio 44114 surveys, close to 4 out of 5 CIE grads pass their FCC exams! Accredited Member National Home Study Council Yes, I want your FREE school catalog and career information What's a license worth? package today. CW -13 In some communications job fields, federal law requires that I am especially interested in: Electronics Technology Industrial Electronics you have an FCC License. And, even in careers where a license FCC License Preparation Electronics Engineering is not required, it can be valuable evidence to prospective em- Color TV Maintenance Other Mobile Communications ployers of certain electronics knowledge and skills. What about other CIE courses? Print Name In every CIE career course, you'll find the same time -tested Address Apt. instructional techniques that have made CIE's FCC License City preparation courses so successful. State Zip Phone Age Whichever CIE course you select (beginner, intermediate, Check box for G.I. Bill information. Veteran On Active Duty or advanced college -level); it will be a complete educational L communications W'9LD SPRING /SUMMER 1977 CONTENTS THE STAFF DX Boom Beneficial Change Boost for Electronics Group Coordinator Japanese and Editor-in -Chief Beginners Among the Best How to Buy a Receiver Julian S. Martin, WA2COL The Three Ss Filters Tuning Accuracy Dr. Wadley's Associate Editor Morgan W. Godwin, W4WFL, Circuit The Digital Display Secondhand Gear Buyer KCR6444 Beware So What's to Hear? Where to Look A Look at Communications Editor Don Jensen A to SSB? SWBC Tomorrow New Bands Coming? Switch Technical Editors DX from A to Z Language No Barrier Fluency Not Needed Charles Graham, W1HFI, KYQ1364 Identifying the los Musical Clues Program Details Help Christine Begole, KFC3553 Getting Those GSLs Writing a Reception Report How You Citizens Band Editor Kathi Martin, KGK3916 Heard It DXing on the High Bands Eavesdropping on the Editorial Assistant Police Broadcasting the Weather Pocket Beepers and Sandra Barack More Reader Feedback Voice Mirror Repeaters SSB Workbench Editor Hank Scott More DX A Final Comment Art Director ... Starts on Page 8 Ralph Rubino Assistant Art Director WHITE'S RADIO LOG Augustus Ginnochlo U.S. AM Stations by Frequency 41 Cover Art Director Irving Bernstein 50 U.S. AM Stations by Location Art Assistants U.S. AM Stations by Call Letters 63 Robert Modero Caroline Imparato U.S. FM Stations by Location 71 Joni Erlon U.S. FM Stations by Call Letters 79 Production Director Bartee U.S. TV Stations by Location 87 Carol Production Editor Canadian AM Stations by Frequency 89 Geri Brakatselos Canadian AM Stations by Location 91 Advertising Director Canadian AM Stations by Call Letters 92 David J. Miller, KCX1268 Advertising /Research Associate Canadian FM Stations by Location 93 Jyll Holzman Canadian FM Stations by Call Letters 93 Newsstand Circulation Director Canadian TV Stations by Location 93 Don Gabree 95 Director of Market Development Worldwide Shortwave Stations James C. Weakley DEPARTMENTS President and Publisher New Products 4 Joel Davis Ask Hank 6 Vice President and General Manager Leonard F. Pinto CB New Products 52 Vice President and Treasurer Literature Library 96 Victor C. Stabile, KBP0681 COMMUNICATIONS WCRLD is published semi -annually by Davis Publications, Inc. Editorial and business offices: 229 Park Avenue South, New York, New York 10003. Advertising offices: New York, 229 Park Avenue South, 212 -OR 3 -1300; Chicago, 520 N. Michigan Ave., 312 -527 -0330; Loi Angeles: J. E. Publishers' Fep. Co., 8732 Sunset Blvd., 213 -659 -3810. EDITORIAL CONTRIBUTIONS must be accompanied by return postage and will be handled with reasonable care; however, publisher assumes responsibility for return or safety of manuscripts, artwork, or photographs. All contributions should be addressed to the Editor -in- Chief, COMMI' CATIONS WORLD, 229 Park Avenue South, New York, New York 10003. Copyright 1977 by Davis Publications, Inc. COMMUNICATIONS WORLD/Spring-Summer 1977 } New Products Compression for Hobbyists keeps track of scores, balls, bonuses and programmable pause or can be installed Got the dubbing blues? Don't be tilts for up to four players and is pro- in mobile phones. The pad is com- afraid to try compression. It can pre- grammed with a sound system that patible with all central office touch or vent more distortion than it causes. It's plays a dozen different tones and tunes rotary tone areas; conversion of rotary great to make dubs or tape copies for that add to the fun and enjoyment dial phones is fast, easy, and presents your friends, but it can become a drag throughout the game. Each sound is as- a professional appearance with a bezel without automation. Let the Miller/ sociated with a different part of the available in all standard phone set co- Sountage compressor take out the te- game. The Game Brain's diagnostic lors. No central office modifications are It dium. allows you to dub at a higher check switch allows its owner to test necessary. Touch Call Converters are than average level to reduce the build- every vital function of the game. When now in stock at Logic Communication for up of hiss and background- noise. And it the switch is engaged, the Bally Fireball immediate delivery. The RT -502 is priced helps stop distortion caused by the sud- at less than $90 in small quantities. Get den peaks live of recording, doubly a all the facts, by writing to Logic Corn- problem in making copies of your mas- " munication Inc., 1225 Tower Avenue, ters. It frees you from the slavery of Superior, WI 54880. constant monitoring during dubbing. The Logic Monitor Logic Monitor 2, a second generation digital test instrument incorporating a fully isolated power supply and select- able trigger threshold which matches the precise characteristics of the loic family under test has just been intro- duced by Continental Specialties.