An Essay from K4AAQ’s QLog Blog
https://www.hamradionow.tv/qlog/2025/7/9/everybody-wants-a-handheld-and-why-they-shouldnt
Author: admin
In this video I dive into 20-metre band (and above) and why it behaves so differently to 40m. We recap the D-layer “sponge,” explore how the F-layer splits into F1 and F2 under sunlight, and talk about take-off angles, hop lengths and long-haul DX. With graphs, a few invented words like “jigglification,” and plenty of plain English, this is a look into how 20 m propagation really works — and why it can be both magical and maddening at the same time!
(Warning: contains maths, PDFs, and raw data files. Proceed only if heavily caffeinated.)
📚 ARRL Antenna Book – Supplemental Files (23rd Edition)
https://www.arrl.org/arrl-antenna-book-23rd-edition-supplemental-files
📄 Installation Summary (PDF) – explains where the HFTA statistical elevation-angle files live
https://www.arrl.org/files/file/Antenna%20Book%20Supplemental%20Files/23rd%20Edition/Antenna%20Book%20-%2023rd%20Edition%20-%20CD-ROM%20Installation%20Summary.pdf
📊 HFTA Documentation (PDF) – dense but explains how to interpret the elevation-angle distributions
https://www.arrl.org/files/file/Antenna%20Book%20Supplemental%20Files/23rd%20Edition/HFTA.pdf
🌐 VOACAP Online (Point-to-Point Propagation) – generate your own AoA tables and predictions
http://www.voacap.com/p2p/
📚 VOACAP Technical Docs – everything you never wanted to know
http://www.voacap.com/documents.html
📰 QEX (Siwiak, May–Jun 2011) – statistical elevation angles across HF; 50% below 6°, 90% below 16°
https://www.arrl.org/files/file/QEX_Next_Issue/May-Jun_2011/QEX_5_11_Siwiak.pdf
00:00 Intro
00:20 Recap on D Layer
00:40 The F Layer
02:06 Take-Off Angles
03:07 Long Haul DX
06:39 Take-Off Angle Chart
09:03 What happens at night?
10:26 WSPR
11:49 Why Oceans Assist
12:19 Long Path to VK / ZL
13:31 When F1 and F2 Combine
15:23 Wrap-Up Conclusion
Let’s have a look at this little beast, the Alinco DR-06TA. I found this on the used market after my previous Alinco video – so I’m finally officially an Alinco owner for the first time!
My views on Alinco: https://youtu.be/frs8_mJC4t4
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I haven’t checked into the world of computers for ham radio in a while, what are people using these days?
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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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Categories
Greyline or Grayline? (#1325)
Jason, K4RKX, has some questions on how grayline propagation works. How can one effectively use grayline? What exactly is it?
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Links from Video:
On All Bands Greyline Article: (8:34)
Videographed and Edited by Teagan Kulbeth, KF0UTR
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Huntsville Hamfest Haul, 2025
I am hosting a social for your favorite youtube to show off what they picked up from the Huntsville Hamfest 2025
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New Tank Radio Pillow – https://www.etsy.com/listing/4295008136/tank-radio-pillow-for-amateur-radio
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5% off selected Items at Gigaparts- https://www.gigaparts.com/nsearch/?lp=KG5AHJ%20INFLUENCER%20PAGE
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Lets build the latest one pound POTA challenge kit!
My intro to Amateur Radio pamphlet is here: https://www.patreon.com/posts/126015747?utm_campaign=postshare_creator
The Coolest Ham Radio Gear:
As an Amazon Affiliate I earn from qualifying purchases
—————————————————————————————————————————
📡 My Big List of No-Regret Gear: https://amzn.to/415oY6s
📡 My Favorite ham radio portable gear items! Check out Gigaparts for 2x the points off the gear I use the most!
https://www.gigaparts.com/nsearch/?lp=JOSH
📡 My favorite Handheld radio antenna is from Signal Stuff Signal Stick https://signalstuff.com/?ref=622 (This is an affliate link)
📡 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
📡 Check out Radioddity ham radio radios $15.00 off Coupon code: JOSHNASS https://www.radioddity.com/?ref=bkobuwhc
📡 Great Value HTs: HTs: https://www.buytwowayradios.com/?cmid=amsreGRvTmttM0k9&afid=Mkx1eE1uN2M0S1k9&ats=bHNrMHVhZ3lZcjQ9
📡 Chameleon Antennas make the most robust antennas on the market, check them out here: https://chameleonantenna.com?bg_ref=99VqhYXETt
📻 Support Ham Radio Crash Course Content 📻
————————————————————————
Patreon – https://www.patreon.com/hoshnasi (includes monthly newsletter, stickers and Patron perks)
📸YouTube – https://www.youtube.com/c/HamRadioCrashCourse/membership (includes early access to videos, membership YT badge and custom emojis)
Shop HamTactical: http://www.hamtactical.com
Shop Our Affiliates: http://hamradiocrashcourse.com/affiliates/
Shop Our Amazon Store: https://www.amazon.com/shop/hamradiocrashcourse
As an Amazon Associate I earn from qualifying purchases.
★ FOLLOW ME HERE ★
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Music by Sonic D:
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#HRCC #hamradio #amateurradio