https://stream.echo6.co/videos/watch/11fef693-0cdb-4459-bec4-233b6b14dca1 Testing a lightweight HF magnetic loop antenna made from 7 metres of RG58 coaxial cable. Contacts were made on 40 and 20 metres during the Lighthouse Weekend. It uses just three main parts: the coax itself, an air-spaced variable capacitor (approx 50 - 100pF max) and a T50-43 ferrite toroid. The toroid is threaded over the coaxial cable. RF from the transceiver is fed via a 2 or 3 turn winding over the toroid (experiment with this for lowest SWR). The coax inner is left unconnected; only the braid is used here. The loop is for low power use only - it will take 10 - 20 watts before the variable capacitor arcs over. Performance is, as expected, somewhere between a smaller pedestrian mobile magnetic loop and a full sized wire antenna. It would be improved if the variable capacitor was a low loss type and the coaxial cable was soldered straight to it. While there's enough information above to make your own, it's worth checking out G4FON's website ( http://www.g4fon.net/ ) for similar loops. My loop is closest to his Version 2. Contents 0:00 Introduction and description 0:41 Erecting and adjustment 1:00 Operating 1:29 Use in limited space 2:10 More contacts PS: If you liked this video please consider supporting Amateur Radio VK3YE by: Subscribing on YouTube,, Checking my books page at https://books.vk3ye.com​​​​​​​​​​​​​​​​ to see if any appeal,, Shopping on Amazon via: https://amzn.to/3iiDQXv , or, Shopping on eBay via: https://ebay.us/i9DuWP (then if you buy something I'll get a small commission at no cost to you) Sat, 09 May 2026 06:24:15 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/11fef693-0cdb-4459-bec4-233b6b14dca1 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.