https://stream.echo6.co/videos/watch/37ddf3b3-ea76-467d-9559-751272104808 Following on from my last video I raise the local oscillator's frequency and give it a wider range to make it a frequency shifter rather than an audio inverter. It can shift from upper audio (and potentially ultrasonic) down to audio frequencies by mixing with a tunable local oscillator. Circuit & constructional info (Short Circuits Vol 2): https://www.jaycar.com.au/short-circuits Buy the kit: https://www.jaycar.com.au/short-circuits-two-project-sound-like-a-dalek/p/KJ8228 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 09:28:27 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/37ddf3b3-ea76-467d-9559-751272104808 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.