https://stream.echo6.co/videos/watch/d295a20c-858c-4a13-9c8c-4306bc5d37e7 Some experiments with a 430 MHz cavity filter made in a biscuit tin. More background info here: http://www.repeater-builder.com/antenna/pdf/w6nbc-duplexer-book.pdf https://vk6uu.id.au/warg2mduplexer.html https://www.radioexperimenter.us/rm-1966-04/kedx.html https://pa0nhc.nl/homemadeDuplexfilter2m/duplexfi.html 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) Wed, 15 Apr 2026 13:29:45 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/d295a20c-858c-4a13-9c8c-4306bc5d37e7 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.