https://stream.echo6.co/videos/watch/6aa09024-8167-40e1-b764-0ddcaedc96ab The last few videos have featured a 1 transistor crystal or ceramic resonator RF oscillator circuit. Here I add a PNP transistor to allow frequency modulation with an electret microphone. The oscillator uses a 18.432 MHz crystal with enough harmonic energy to permit reception around its 8th multiple (147.456 MHz approx). Contents 0:00 Introduction 0:13 What frequencies can you get? 1:09 Test oscillator circuit 1:30 Test with receiver 2:15 Test with handheld FM receiver 2:32 Circuit diagram with FM modulator 3:20 Testing FM audio 3:45 Other additions 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, 13 Jun 2026 18:03:09 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/6aa09024-8167-40e1-b764-0ddcaedc96ab 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.