https://stream.echo6.co/videos/watch/0b934de1-0e23-4b00-a745-c82e953d4d65 When the bands are dead does that mean there's no propagation? Or is everyone just listening? This video shows what happens when you hook an automatic CQ caller up to a 40 metre QRP transceiver and the sorts of contacts likely. The caller is based on an Arduino microcontroller board (the KitTen from Freetronics) and two extra parts. The software is easily modified from the 'blink' program used to teach beginners. While it's set up for CW use, the addition of a digital voice recorder and a minor software change allows it to be used for voice modes as well. UPDATE: Reed relay started to get a bit sticky after several days heavy use. So instead of replacing it I used a 4N25 optocoupler and 470 ohm resistor. I also moved the switch from in between the sockets to the power supply as this lowers consumption when not in use. See http://youtu.be/Gxa5l3gD8bc for the circuit. 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 10:20:30 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/0b934de1-0e23-4b00-a745-c82e953d4d65 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.