This is the 40m / 20m special design I’m testing out. It’s 6.5m lonf (only) and has a 35uH coil at around 5.5m. Resonates on 20m and 40m. Let’s try it out! Callum.
Author: admin
Are you wondering why your antenna is shorter than it should be? In this video, we’ll explore the concepts of end effect, velocity factor, and height above ground and how these affect the electrical length of an antenna.
First, we’ll explain how end-effect shortens the electrical length of your antenna and how it can be compensated by adjusting the length of the radiator. We’ll also discuss how velocity factor affects the propagation speed of electromagnetic waves and how it can vary depending on the type of coating or material.
Then, we’ll dive into why height above ground affects the tune of an antenna.
Whether you’re a beginner or an experienced ham radio operator, this video will provide valuable insights why adjustiung your antenna can be slightlly "weird" sometimes! Stay tuned and let’s dive into the world of antennas!
Callum.
More Videos:
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7zFt6NV9fnnde2lP11fUTQ8 Antenna Modelling
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▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xwhA0Msm_bNT4CQ_Bj5D4c Antennas
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▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Ham Radio Training
Today I switch all of my portable antennas that I commonly use for POTA and portable operations to the Gigaparts Explorer Backpack, a very well-thought out Ham Radio Bag. I’m curious as to your thoughts about this bag.
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We had fun at the Greater Houston Hamfest of 2023 – looking forward to next year!
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In this video, we take a look at the most complete antenna reference for ham radio that I have seen. The book is available in English for the first time with the release of the 13th edition.
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I’m W1AW/7 live on 10 Meters
I’ll be working W1AW/7 Idaho all week. I’ll try and livestream a few of them
2 A Content from a Cop’s perspective: Rumble.com/K6UDA
Show Notes:
Join Me every Monday at Noon Mountain Time (1800 UTC) for the 2 Alpha Ham Radio Podcast Live. I’ll bring in short subjects that we can dive in and look at, you can bring up subjects to discuss. You can also join me as a guest on the show.
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Wires X: Youtubers 40448
FCS Reflector: Youtubers 003/48
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Ed, K9EGS, has question on HF mobile mounts. He wants to use a magnet to hold his antenna on the top of his car. He also is wondering if he grounds his antenna to his car, if it will improve the performance of his antenna. Watch to learn more.
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