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KJ6ER Antennas

June 2026

Navigating the Summer Doldrums and

the Impending Solar Cycle Minimum

with Efficient KJ6ER Antennas

Dear Fellow Portable Antenna Geeks 😀

Our amateur radio hobby is unique among technical hobbies in that its performance is directly influenced by forces far beyond the Earth. Most influential among these is the Sun, whose solar activity impacts the behavior of the ionosphere and, in turn, the propagation of our radio waves across the globe.


Have you ever wondered why the summer months are always so tough on the HF bands, especially our beloved 15M-10M bands? Read all about why it happens to amateur radio in my latest free PDF, Navigating Summer Doldrums and the Solar Minimum! Learn how the warmer summer months deplete our F2 layer of free electrons which are vital to long-haul HF radio propagation on the upper bands.


This Negative Summer Anomaly is only a preview of how the impending Solar Minimum will affect our hobby as we get closer to 2030. Develop and practice new operating skills and techniques with a fresh daily playbook to prepare for the declining 11-year solar cycle. I also share pragmatic insights to help you understand what those space weather metrics mean for HF radio propagation and how they should be leveraged by you every day before you get on the air.


The month of June also brings us to ARRL Summer Field Day! Regardless of the summer propagation conditions, the hot weather months always make for great outdoors ham radio fun! Deploy your favorite KJ6ER antenna for Summer Field Day this year and make a big impact for your Amateur Radio Club or for yourself.


If you do not have the time, ability or interest to build your own KJ6ER antenna, you can purchase a beautifully assembled handmade antenna system as well as accessories on Etsy. More than 240 products have already been sold at the J-Systems Store on Etsy since June 2025 with over 60 perfect 5-star reviews from buyers.

Solar Heating in Summer
Solar Minimum
ARRL Summer Field Day
J-Systems Etsy Store

During the peak of the 11-year Solar Cycle, ham radio operators enjoy highly favorable conditions. All the HF bands flourish, long-haul communication becomes almost routine, and even low powered, modest stations can achieve worldwide contacts with relative ease. In contrast, the low end of the solar cycle, referred to as the solar minimum, presents a very different operating environment. Sunspot numbers decline, ionospheric ionization weakens, and the higher HF bands often become unreliable or completely unusable for extended periods.

11-Year Solar Cycle

According to NASA, Solar Cycle 25 peaked during October 2024. That was 18 months ago, and we are already beginning to feel the early impact of the declining solar cycle which are enhanced and previewed during this period of the summer doldrums. Use these upcoming summer months to learn new operating skills and daily radio routines. This is not a time to turn off your equipment and go dormant with our wonderful hobby, but a period for you to alter your ham radio mindset and adjust your expectations to the impending solar minimum.

Sunspot Number Progression

Operators who adapt by focusing on high radiation efficiency antennas, lower-frequency bands, digital modes, and careful monitoring of space weather conditions can continue to make impressive QSOs throughout the low-end of the cycle. By understanding how changing solar conditions affect the ionosphere and adjusting operating strategies accordingly, amateur radio enthusiasts can remain active, competitive, and successful even during the quietest years of the solar cycle. Watch this video interview I recently conducted with Stu Crawford VE9CF titled Solar Cycle 25 Ending? What Every POTA Op Needs To Do NOW!

This Month's KJ6ER Antenna Heroes

Each month I feature videos and blogs of hams sharing their own personal implementation of a KJ6ER antenna including how they built and deployed it, as well as how it performed. This month I am featuring three popular YouTube hams who all recently shared a video on the KJ6ER Challenger Off-Center Fed (OCF) Halfwave antenna! Over the past few months, the Challenger PDF downloads have been accelerating because of its high radiation efficiency, fast deployment and strong performance during these tougher band conditions. Take a look!

Michael Martens KB9VBR of Wausau, Wisconsin is a well-known ham radio YouTuber who has always been a strong supporter of KJ6ER antennas. In this recent video, he deploys the Challenger successfully during a POTA activation but also shares his "challenge" with the deployment. He discusses how the local ground conditions can impact the antenna's impedance/SWR and how he works around it with the counterpoise. Subscribe to his YouTube channel.

KB9VBR YouTube Video
Tim Hale K5OHY Video

Tim Hale K5OHY of Midland, Texas always creates educational and insightful videos for hams with all levels of experience. In this YouTube short, he talks about the Challenger and discusses why it is one of his favorite vertical antennas. He does an excellent job of summarizing many of the technical features and deployment techniques for the antenna. He also describes his "budget Challenger" he built for travel made from wire instead of a whip and a homebrew 4:1 unun. Subscribe to his YouTube channel.

Stu Crawford VE9CF of New Brunswick returns as a Hero this month with an instructional video on how he built his version of the Challenger antenna in his home workshop. He walks the viewers through his construction process and then deploys it successfully in his yard for initial testing. Stu is an avid DXer and immediately puts the Challenger to the test! Watch how he easily works Slovenia and Germany with big signal reports. Subscribe to his YouTube channel.

VE9CF YouTube Video

If you would like your video or blog featured in one of my upcoming newsletters, share how you are building and deploying your own KJ6ER antenna. You will get visibility with thousands of my newsletter subscribers worldwide! Send me a link to your online content about any of my antennas and I will feature it in one of my future newsletters! I am very interested in how you customized the build for your own needs either as portable or at your home QTH. I know many of these wonderful antenna videos and blogs already exist - send me a link to your favorite.

KJ6ER Heroes Program

Visit the KJ6ER Website

Your one-stop shop for everything KJ6ER can be found at my kj6er.net website! I update the site on a daily basis with all my free Antenna Designs, access to my Antenna Geeks List, links to the Etsy store offering handmade KJ6ER Antennas and Accessories, recent Press and Interviews, a list of my Favorite Ham Radio Websites, as well as a complete Monthly Newsletter Archive. I want to sincerely thank the thousands of you around the ham world who have already visited the site. I will keep improving it!

KJ6ER Website

KJ6ER Beta Testers Program

As many of you know, I introduced a KJ6ER Antennas Beta Testers program recently to encourage interested hams to get draft PDFs of my new antennas in advance, build and deploy them, and then summarize their experiences with me. If you would like to become a KJ6ER Antenna Beta Tester, send me a message. Your early review of my draft PDF, antenna design and build helps me improve the content quality in the PDF, as well as the construction and deployment process.

ABR Coaxial Cables

Why not buy yourself a well-deserved gift of a fresh set of high quality ABR coaxial cables. If you use my callsign KJ6ER as the coupon code at check-out, you will receive a nice 10%-20% discount on your total order! Get your new ABR cables today!

Until next time, keep having fun out there! Building ham radio antennas is our last homebrewing frontier and I am dedicated to helping you do so successfully! See all my free antenna design plans on my website and at the cloud links below.



If someone forwarded this email to you and want to be added to my antenna geeks email list, send me a message and you will be the first to receive new KJ6ER antenna designs and updates! I am also available to present my antennas to your Amateur Radio Club via Zoom. Let me know if they are interested! 



As always, feel free to reach out to me if you ever have any questions, I'd be happy to help you! 🙂 73 KJ6ER, Silicon Valley

My mission is to design efficient and effective portable antennas for the every-ham that focus on the optimal integration of performance (high radiation efficiency), elegance (speed and simplicity of deployment) and convenience (ease of transport and storage). These designs are always shared for free with the global amateur radio community to encourage more radio operators to homebrew their own portable antennas. 

KJ6ER Antennas Website

Cloud Drive File Links (KJ6ER):

Greg Mihran, KJ6ER

Campbell, California

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