https://stream.echo6.co/videos/watch/be4bdc23-0dad-4b7e-9524-e7ced042b3e8 Another look at the Q multiplier crystal set. Here I've added a 1 transistor audio amplifier (BC548 transistor, 220k resistor, 4.7k resistor, 2 x 4.7 uF capacitors) and am listening on a different amplifier. I do a band scan of the MW broadcast band then tap down the coil to allow higher frequency reception. Signals at 2.4 MHz are heard from the Northern Territory and then SSB amateurs on 3.5 MHz. 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) Mon, 04 May 2026 01:22:10 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/be4bdc23-0dad-4b7e-9524-e7ced042b3e8 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.