My favourite magnetic loop for HF pedestrian mobile
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- Опубликовано: 23 июл 2024
- Most HF pedestrian mobile activity seems to be on 14 - 28 MHz, where it's easier to build efficient portable antennas. However due to its activity and propagation 7 MHz is also an excellent mobile band. In this video I compare copper and aluminium magnetic loops of different construction. You'll hear contacts from a single afternoon's pedestrian mobile operating on 7 MHz. The tests demonstrate that HF pedestrian mobile with easily carried antennas is both effective and practical. Stations worked were between about 300 and 1500km distant. A constructional article for the aluminium loop appears at vk3ye.com
If you want a pre-built loop that handles higher power, consider this commercially-made unit. ebay.us/fDSgt5 (Note: I receive a commission on sales though this link at no extra cost to you).
Contents
0:00 Introduction
1:20 Comparing with previous loop
2:40 Looking in detail at favourite loop
4:35 Testing on air while pedestrian mobile
7:14 Conclusion
PS: If you liked this video please consider supporting Amateur Radio VK3YE by:
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Хобби
Great video, 1/4 wave and magnetic loops are amazing. I would caution anyone however of holding a loop. The person would be in the RF field of a loop, greatly exceeding exposure guidlines. In addition RF burns are likely if one touches the loop during transmit, and is also high current and voltages even at 5 Watts. Voltage is going to be over 1000V and high current as well.
Great video. Very imformative. You show how to make it and how it works.
G'day Pete. Great video. you inspire me to pursue the mag loop option. Thanks mate.
Regards. Justin. VK4JUS
Hi Peter keep up the good work you make Amateur Radio very interresting and keep me thinking about projects to do . Great to work you the other day QRP to QRP my rig K2 -3w. 73s Vk3ut Greg . Cheers Mate .
A very informative video. I have been looking for an antenna like this, since I live in a HOA which restricts antennas on roofs. Thanks 73's KK6FYE
Interesting video Peter ! nice construction ! 73s
Well done Peter, done very well mate and great to make the contact.
Cheers
John
VK5FBBJ
Thanks Peter, your a Gem, will be making your Al loop, good stuff.
73 Dennis VK4JDJ
Thanks Peter,
I love mag loops! Never tried the gamma match because I thought them to be somewhat frequency dependent. My Faradays are triangler to best couple. It's max current there too, so use them on Tx/Rx side ;)
Here is a simple tip you might like. To ensure best output on frequency. An led to several turns of insulated wire against the loop. The brighter, the better the radiation. It just works! If you like, film it. ;)
Also, direction. 90 DEG from null. Easy peasy QRM/N or IQ0 killer.
How do these magnetic loops compare signal wise to a vertical or a dipole like the buddipole?
good morning, wath is the reference of your variable capacitor of your first antenna (with coax cables) and wath is the frequence range of her? Thanks a lot, 73. PR7RC.
Great video! My first contact on an FT817 on my 20 meter loop inside the radio room with Jack KB9EYN looking on, was 1540 miles to the East coast of the US with 3 watts SSB.
I have a nice small copper loop but I'll try the aluminum flat one like yours this summer, cool build. So I don't have to re-invent the wheel can I get you to e-mail me the plans or diagram. Good on QRZ OM TNX.
73
Jimmy, ARRL TC, WX9DX
Hello Peter, I really like the construction of the aluminium loop, an some great results, we have got to try a contact with it on 20M pedestrian to pedestrian mobile Peter, I am sure if we are both in good locations and the propagation is good we can make it.
73's ... Dave G4AKC
Yes
Hi Peter, I can buy the flat aluminium, but I am not sure how to bend it into a figure of 8. Any suggestions please? Thanks & 73.
Nice video ! 73's SA5LKC
Got mine built but not performing as well as yours. Think I need to connect the cap better electricaly to the loop
good.
what is the value of the Polypropylene Capacitor?Do you have the detail of the aluminum loop?
+revo adan Details of the loop are on my website at vk3ye.com
If you used 2 x 3 meter lengths of strip it'll be about 5 times more efficient rather than
i love my 12 11 10 mtr loop tnx peter for the idea kg6mn
Test antenna by placing it horizontally, not vertical