New online editions are available for QST, OTA, QEX, and NCJ.
Views expressed in these digital editions are those of the reporters and correspondents.
Content supplied by HQ ARRL.
Accessed on 09 October 2020, 1910 UTC, Post 1667.
Source (email subscription to “The ARRL Current”):
Please click link or scroll down to read a synopsis of each publication.
NOW ONLINE! Digital editions of November 2020 QST, Sept/Oct 2020 OTA, QEX, and NCJ
Science Fair Adventures in Ham Radio
Roy Gross, KM6EOO
A teenage ham’s journey in troubleshooting and improving his radio-related project.
With just 15 minutes until the Terman Middle School Science Fair in Palo Alto, California, I decided to test my project once more — but something went wrong. After the first transmission, my push-to-talk (PTT) circuit failed and the radio was stuck transmitting noise. I desperately tried replacing the metaloxide-semiconductor field-effect transistor (MOSFET) with a new one, and, thankfully, the problem was fixed.
September/October On the Air
Installing a Mobile Radio in Your Vehicle
Norm Fusaro, W3IZ
Having ham radio in your car is another way to stay in touch with friends, or to call for assistance during an emergency. Because modern radio equipment is compact and lightweight, you might think installing it a vehicle would be straightforward. However, modern vehicles are compact, use lots of plastic, and are loaded with their own technology, which presents a unique set of challenges for the mobile ham radio operator. Here are some things to consider when planning your mobile setup.
Estimating LF – HF Band Noise While Acquiring WSPR Spots —
Gwyn Griffiths, G3ZIL; Rob Robinett, AI6VN, Glenn Elmore, N6GN
Systematic measurements of noise at your receiver can help improve your station performance and provide insights into the ionosphere and propagation. Noise levels are a topic of long-standing concern to radio amateurs. Over recent years a perceived upward trend in noise levels has added to that concern.
This has led to a number of initiatives by national amateur radio societies including in the UK, the Netherlands, South Africa and Germany, and ARRL have recently laid the groundwork for a noise study in a rural environment. Other spectrum users are also affected; for over 30 years the US government has supported a Signal-to-Noise Enhancement Program to measure, identify and mitigate noise and interference. There is an example in the public domain of the methods used and results obtained during a 2010 investigation at a Department of Defense receiver facility at Key West, Florida.
A Contester’s Guide to Aluminum Alloys
Robert Tuttle, N8YXR
At some point, many contesters decide to construct their own antennas. When constructing your own Yagi or vertical, a number of choices are available for materials, including those for fashioning the elements. Benchmarking existing designs would lead most amateurs to use an aluminum alloy. The reason for aluminum might seem obvious, since it has a high conductivity and low density (0.0975 lb/in3).
Copper tubing might seem a better choice due to its higher conductivity and strength, but with a density of 0.307 lb/in3, those advantages come at a price. Producing an A3S-style Yagi, which weighs 27 pounds in aluminum, would weigh 85 pounds if made from copper tubing!
Okay, you decide that conventional wisdom on using aluminum alloys seems based on some sound engineering, and you decide to do an internet search for aluminum tubing. And then it hits you: There are a lot of aluminum alloys out there — and what do all those numbers mean? What’s 3005-H14, 2024-T6, 6061-T651, or 7075-O? Not all alloys are available in all sizes you want. How do you choose? Let’s see if we can demystify some of this.
What’s the Buzz
Eclectic Tech, Episode 18 – October 8
ARRL Member Al Rabassa, NW2M, talks fan-cooling technology with host Steve Ford, WB8IMY. Cooling fans are important to all sorts of technology – from ham transceivers and amplifiers to computers. It’s more than just installing a fan and turning it on. Tune in to learn how to calculate cooling and determine the amount of airflow needed. Steve will also discuss a new type of electromagnetic shielding material, and an Arctic archive for computer software.
On the Air, Episode 10 – October 8
Guest host, Steve Ford, WB8IMY, introduces listeners to the ARRL Learning Network. Learn how this member-driven webinar series is taking knowledge sharing to a new level with ARRL Lifelong Learning Manager Kris Bickell, K1BIC.
ARRL Learning Network
Learn more about microcontrollers and open-source hardware and software from popular ARRL author Glen Popiel, KW5GP!
ARRL members can register for his upcoming webinar, “Welcome to the World of Arduino,” on Thursday, October 15.
NEW in the ARRL Store
Fall into our Newest Styles!
ARRL Titanium Vest
Give yourself some extra insulation without bulking up with our ARRL Men’s Quilted Vest. Water-resistant, windproof and soft, it’s packable and perfect for layering up on cold days or its own in warmer weather.
ARRL Crew Sweatshirt
A great wardrobe addition for any ARRL fan! This unisex, crewneck sweatshirt is ideal for chilly tailgates, hikes, hunting, or anytime you want to show off your ARRL spirit.
These and other Fall-inspired products are available while supplies last at arrl.org/shop.
Storm Spotting and Amateur Radio
Use your communication skills to help keep your community safe!
During severe weather events, amateur radio operators bring significant resources to storm spotting, including an established communications system that can function in an emergency. They provide real-time information to partners like emergency management and forecasters at the National Weather Service. The data received from hams helps issue weather watches, warnings, and advisories. This book can help you become one of those volunteers, providing ground-truth information when it is needed most.
Order Online at http://www.arrl.org/shop.
Member Benefit Reminder
Find your place in the amateur radio community.
Are you looking to be more involved, learn new skills, find a mentor or friends to share your amateur radio interest? Check out your local amateur radio club and start making the most of your amateur radio license. Visit http://www.arrl.org/find-a-club to find a club near you.
Upcoming Events for Radio Amateurs
Score Something Awesome at the ARRL Online Auction
Sponsored by: GigaParts Inc.
The 15th Annual ARRL Auction has something for everyone! This year’s auction features items from our latest releases to classic, out-of-print publications to lab-tested equipment and mystery boxes full of must-have, one-of-a-kind items. Get details, register, and see what’s up for grabs at arrl.org/auction. Preview available now. Place your bids from October 15-22, until 10PM.
Be sure to check out the ARRL Online Auction Facebook event page!
ARRL News & Information
Get news, information, and alerts that matter to you delivered directly to your email inbox. Log in and subscribe today!
Everything you need to know about ARRL and ham radio news in one easy-to-scan newsletter, sent weekly.
ARRL Contest Update
Offering a biweekly roundup of information on upcoming contests for both the active and casual contester.
Interested in emergency communications and public service? The monthly ARES Letter will keep you up to date.
ABOUT THIS EMAIL
You are subscribed to receive monthly notification of the digital editions of the ARRL magazines. If you have an ARRL user account, you can manage your email preferences at http://www.arrl.org/myarrl.
ABOUT THE ARRL AUCTION
Proceeds from the annual Online Auction benefit ARRL education programs. All bidders need to register. Please note that your arrl.org user ID and password will not work on this site. If you have previously registered, you may use the same login information. If you have forgotten it, simply click the “Help” tab and you’ll find instructions for how to retrieve your password or user ID.
Just a reminder: The BIARC Board of Directors and general BIARC membership meeting will take place via the ZOOM protocol on Saturday, 10 October 2020, 1400 HST. For details, check the BIARC ListServe.
Aloha es 73 de Russell Roberts (KH6JRM)
Public Information Officer
Hawaii County, ARRL Pacific Section