https://stream.echo6.co/videos/watch/116d9098-e363-4814-a2d6-f47cb33f3940 Broadband ferrite transformers are used in many radio and antenna balun projects. But their construction is a mystery to some. This video describes some applications and shows how to make them. Having this skill will help with transmitter and receiver projects and save money when you need a balun for an antenna. Contents 0:00 Introduction 0:29 Properties of ferrite and applications 2:08 Use of twisted wires / bifilar vs trifilar 3:36 Wire used and sources 4:14 Estimating wire diameter 5:21 An example of winding a transformer 6:24 Twisting the wire in a hand drill 7:33 Starting the winding 9:59 Testing with a multimeter 12:07 Conclusion 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 06:25:32 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/116d9098-e363-4814-a2d6-f47cb33f3940 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.