If you're having trouble viewing this video, please insert the following URL into your browser search box: https://youtu.be/RRkbdTadmUU. Another excellent tutorial from Dave Casler (KE0OG). This time, Dave explains the general theory behind manual antenna tuners and how to tune them with both an external SWR meter and with the SWR meter built into your transceiver. In this tutorial, Dave uses an old MFJ-901B manual antenna tuner to provide multiband coverage on his 80-meter full wavelength loop antenna. Dave's explanations are easy to understand and provide a good general review of SWR and manual antenna tuner operations. For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. You can follow our blog community with a free email subscription or by tapping into the blog RSS feed. Thanks for joining us today! Aloha es 73 de Russ (KH6JRM).