https://stream.echo6.co/videos/watch/f858bac0-074b-47c4-9077-c433cf0247aa Some crude field strength tests with a beam formed from two magnetic loops. Two loops correctly spaced and tuned appear to provide a small amount of gain (approx 2dB). The driven loop is detuned about 2% above the operating frequency. A second passive loop drops the driven loop's resonant frequency. Careful spacing and tuning of both loops is required to provide this gain. Improvements to the experiment include 1. a longer measuring distance to compare far field strengths (with a more accurate and more sensitive FS meter), and 2. a brace to ensure loops are held more firmly together (as spacing is critical). Further details on these loops can be found on vk3ye.com or other YouTube videos. 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, 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 06:07:29 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/f858bac0-074b-47c4-9077-c433cf0247aa 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.