Testing 4-Square on 40m, the new 80m and 160m antennas too.
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Late-Night DX – Low Bands
Category: Youtube
Category Added in a WPeMatico Campaign
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What’s the Right Coax? (#1343)
Joel, K8SHB, wants to upgrade his station and isn’t sure what kind of coax would be best for his setup? What is the best for a standard ham station?
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DX Engineering: (6:20)
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Videographed and Edited by Teagan Kulbeth, KF0UTR
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To pose an Ask Dave question, email to askdave@arrl.org. Feel free to include pictures or drawings to help clarify. I may answer your question directly, via an Ask Dave video, or in my monthly column "Ask Dave" in QST.
Theme music is "Sour Tennessee Red," by John Deley and the 41 Players, courtesy YouTube Music Library. You can listen to the entire song here: https://youtu.be/Vfc9sAQjJtc
I use drawings from OpenClipArt.org, including the "walking man"
Thanks to my sweet wife, Loretta, KBØVWW, for both audio and video assistance! (Her website is www.aldea-art.com.)
My primary website: http://www.dcasler.com
My publishing website: http://www.mtsneffelspress.com, where you can find my fantasy and science fiction books.
My Amazon author page, which lists my print and Kindle books: http://www.amazon.com/-/e/B00471I0Q4.
Today we’re commissioning the COMTEK / DX Engineering 40m 4-Square Antenna system here at DX Commander HQ. This is one of the most powerful setups for the 40m band — insane signal strength and front-to-back ratio. In this video I’ll take you through the build, wiring, tuning, fault-finding, and finally the moment of truth… including working Japan at +20dB over S9!
If you’re interested in serious DXing or contesting on 40m, the 4-Square is a game-changer.
Thanks to:
Tim Duffy K3LR and the DX Engineering team for the Comtek
Stefano at Messi & Paoloni for the 75 ohm coax
Martin and Mike for radial work and installation help
👉 Subscribe for more antenna builds, on-air tests, and DX Commander behind-the-scenes!
0:00 – Introduction & overview
0:20 – What is a 4-Square?
1:00 – Direction switching explained
1:45 – The COMTEK / DX Engineering controller box
3:00 – Wiring up & dummy load
4:45 – Software control with OM module
6:30 – Clickity-click relay tests
9:20 – Thank you DX Engineering
10:30 – Dummy load install
12:00 – Coax routing challenges
14:00 – Phasing line connections
16:30 – Trimming & tuning elements
19:00 – Resonance checks & adjustments
23:00 – Chat with Tim Duffy K3LR
24:30 – First tests & fault-finding
27:30 – T-piece troubleshooting
30:00 – Fixing a duff PL259
32:20 – Retesting antenna
33:15 – LIVE QSO with Japan (+20dB over S9!)
35:10 – Final thoughts: cost, complexity, and performance
#dxengineering
#dxcommander
I Stopped In Arkansas And Discovered This Beautiful State Park
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Belton HamExpo Fall 2025
Unlock the secret potential of your Xiegu radio! In this video, I take a deep dive into the WR-12 wideband receiver, the mysterious little box that promises to expand your listening range far beyond the ordinary.
• How it connects to your radio and what it really does.
• My honest impressions—does it live up to the hype?
• The surprises (and disappointments) I found when testing it.
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👉 Xiegu X6200: https://geni.us/UsbW6
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👉 Whether you’re a shortwave listener, ham operator, or just curious about the magic behind wideband reception, this is a must-watch.
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REZ makes extremely robust antennas. Today we look at five configurations of their antennas to see which one I like the most. https://www.rezantenna.com/
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📡 I recommend the Ed Fong J-Pole? https://www.kbcubed.com/DBJ-2H-Amateur-Ham-2m-70cm-Dual-Band-Portable-Rollup-Antenna-by-Ed-Fong-p406009746
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Is This a Real Walkie Talkie?
They say it’s a bluetooth speaker & walkie talkie. we’re putting it to the test.
Check Out my new channel here on youtube, Idaho Preparedness I’m gonna try live-streaming this weeks Southern Idaho Preparedness Net.
Join me every Saturday morning at 0900 hrs mountain time for the Southern Idaho Preparedness Net. This is the net where we learn about personal preparedness for emergencies, disasters & SHTF & train to become the news, information and situational reporting sources in our communities.
Locally in the Idaho Magic Valley on the K6UDA repeater 444.500, Hansen Butte 2M 145.170 or KB7DFP 442.000. You can get on from anywhere in the world using:
Wires X: Idaho Command 40448
YSF Reflector: Idaho Command 40448
Categories
ALC Adjustments (Short #97)
@robertoradice4676 is wondering is he can manually adjust the ALC and how a setup like this would work. What is the best solution?
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Videographed and Edited by Teagan Kulbeth, KF0UTR
#amateur radio
#ham radio
#technician license
#general license
#extra license
#ham radio training
#ke0og
#dave casler
#ham radio answers
#icom 7300
#antenna
#dipole
#end fed dipole
#mag loop
#magnetic loop antennas
To learn more about me, visit: https://dcasler.com
To support my channel financially, visit: https://dcasler.com/support (offers several options)
To pose an Ask Dave question, email to askdave@arrl.org. Feel free to include pictures or drawings to help clarify. I may answer your question directly, via an Ask Dave video, or in my monthly column "Ask Dave" in QST.
Theme music is "Sour Tennessee Red," by John Deley and the 41 Players, courtesy YouTube Music Library. You can listen to the entire song here: https://youtu.be/Vfc9sAQjJtc
I use drawings from OpenClipArt.org, including the "walking man"
Thanks to my sweet wife, Loretta, KBØVWW, for both audio and video assistance! (Her website is www.aldea-art.com.)
My primary website: http://www.dcasler.com
My publishing website: http://www.mtsneffelspress.com, where you can find my fantasy and science fiction books.
My Amazon author page, which lists my print and Kindle books: http://www.amazon.com/-/e/B00471I0Q4.
Are you in the market for a mobile ham radio but unsure of what to look for? Buying the right mobile ham radio can be a daunting task, especially with the numerous options available. In this video, we’ll guide you through the key considerations when purchasing a mobile ham radio, helping you make an informed decision. From frequency range and power output to digital modes and installation, we’ll cover the essential factors to consider. Whether you’re a seasoned ham radio operator or just starting out, this video will provide you with the knowledge you need to find the perfect mobile ham radio for your needs. Watch now and discover the top things to consider when buying a mobile ham radio.
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