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category_outlined / Технологии и Игры
CQ Amateur RadioCQ Amateur Radio

CQ Amateur Radio

July 2019

CQ is the magazine for active hams, with a focus on the practical. Every article is clearly written and aimed at involving you, the reader...whether it's a story of operating from some exotic location, an article to deepen your understanding of ham radio science and technology, or a fun-to-build project that will have practical use in your ham shack. Join us on our monthly journey through the broad and varied landscape of the world's most fascinating hobby!

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United States
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English
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CQ Communications, Inc.
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cq amateur radio

EDITORIAL STAFF Richard S. Moseson, W2VU, Editor Jason Feldman, KD2IWM, Managing Editor Susan Moseson, Editorial Consultant CONTRIBUTING EDITORS Kent Britain, WA5VJB, Antennas Gerry L. Dexter, The Listening Post Joe Eisenberg, KØNEB, Kit-Building Tony Emanuele, K8ZR, VHF Tomas Hood, NW7US, Propagation John Langridge, KB5NJD, MF/LF Operating Anthony Luscre, K8ZT, Microcontrollers Irwin Math, WA2NDM, Math’s Notes Joe Moell, KØOV, Homing In Eric Nichols, KL7AJ, Analog Adventures Ron Ochu, KOØZ, Learning Curve Jeff Reinhardt, AA6JR, Mobile/Radio Magic Scott Rought, KA8SMA, QRP Don Rotolo, N2IRZ, Digital Rob de Santos, K8RKD, Communications Horizons Walt Palmer, W4ALT, Emergency Communications Bob Schenck, N2OO, DX David Siddall, K3ZJ, Contesting Jason Togyer, KB3CNM, Spurious Signals Gordon West, WB6NOA, Short Circuits Wayne Yoshida, KH6WZ, The Ham Notebook AWARD MANAGEMENT John Bergman, KC5LK, WAZ Award Brian Bird, NXØX, USA-CA Custodian Steve Bolia, N8BJQ, WPX Award Keith Gilbertson, KØKG, CQ DX Award CONTEST MANAGEMENT Andy Blank, N2NT, CQ 160 Meter Contest John Dorr, K1AR, CQWW DX Contest JK Kalenowsky, K9JK, CQ VHF Contest Ed Muns, WØYK, CQ…

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announcements

JULY HARRISBURG, PENNSYLVANIA — The Harrisburg Radio Amateurs’ Club will hold its 48th Annual Firecracker Electronics Expo and Hamfest beginning 8 a.m., Saturday, July 6 at the Harrisburg Area Community Center, 3599 Industrial Road. Contact: Terry Snyder, WB3BKN, P.O. Box 355, Halifax, PA 17032. Phone: (717) 896-0256. Email: <wb3bkn1@gmail.com>. Website: <www.w3uu.org>. Talk-in 146.13+ (PL 100). DXCC / WAS card checking. OAK CREEK, WISCONSIN — The South Milwaukee Amateur Radio Club will hold its Swapfest 19’ beginning 6:30 a.m., Saturday, July 6 at the American Legion Post 434, 9327 South Shepard Avenue. Contact: Karen, KC9WQJ, (414) 578-0492 or Mike Lea, W9MRL, (262) 880-2091. Website: <www.qsl.net/wa9txe>. Talk-in 146.91. SALISBURY, NORTH CAROLINA — The Rowan Amateur Radio Society will hold the 34th Annual Firecracker HAM-FEST from 8 a.m. to 2 p.m., Saturday, July 6 at the…

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ham radio news

“Near-Normal” Atlantic Hurricane Season Predicted The National Oceanic and Atmospheric Administration (NOAA) is predicting a “near normal” Atlantic hurricane season this year, with between 9 and 15 named storms, of which 4 to 8 might become hurricanes, half of which could become major hurricanes (category 3 or higher). The forecast from NOAA’s Climate Prediction Center does not predict the possibility of landfalls. Forecasters say competing climate factors will likely cancel out each other’s effects, leading to the likelihood of an average season. The Atlantic hurricane season runs from June 1 to November 30 of each year. Hurricane Response Was Key Element of Amateur Radio Demonstration A major hurricane with mass casualties in the mid-Atlantic and New England states was the scenario for a demonstration of amateur radio’s ability to transmit and receive messages…

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zero bias: a cq editorial

Boy Scout camp. Sitting on the floor of the rec hall, watching a grainy black-and-white image on a TV that one of the camp directors had brought in for all of us to watch, and listen, as Neil Armstrong counted down the number of feet to the lunar surface and then announced, after the picture had briefly gone black, “Houston, Tranquility Base here. The Eagle has landed.” Cheers and applause, then holding our breaths as Armstrong and crewmate Buzz Aldrin climbed down the ladder and became the first humans to set foot on ground that wasn’t on the Earth. It was July 20, 1969 — 50 years ago this month — and I remember the Apollo 11 moon landing like it was yesterday. And if you’re age 55 or older, there’s…

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digital-only am broadcasting?

The following is from Communications Horizons editor Rob de Santos, K8RKD: The future of the AM broadcast band in the U.S. has continued to be in doubt despite several initiatives by the FCC to give it renewed life. Only FM translators have seen much impact until now. The broadcast industry seems to be taking the lead to help itself. Recently, a petition was filed with the FCC1 to allow AM stations to go fully digital and forego the analog mode entirely. Texas-based Bryan Broadcasting has asked the FCC to authorize it to go “HD” 24 hours a day without any of the analog overlap currently common to digital AM in the U.S. Several stations, most recently WWFD of Frederick, Maryland, are doing or have done this experimentally. Major industry associations, including the…

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putting a computer power supply to work in your ham shack

We had a few scavenged tower case computer power supplies kicking around for a while (Photo A). So we launched an investigation online into how these power supplies could be put to new uses and found some excellent instructions. With the use of a talking multimeter, we were able to successfully convert a couple into a 12-volt DC ham shack power supplies and have been using it to run Ron’s Kenwood TM V7A transceiver, using a 300-watt supply, and Mike’s μBitx transceiver, using a 200-watt supply, for a while with no issues. The photos in this article are of Mike’s build, which also brings out the 5-volt and 3.3-volt supplies out for future use. The links below will take you to articles explaining the conversion. After the links, we will give…

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