Add-on beat frequency oscillator (BFO) for shortwave radio

<img width="2537" height="1270" src="https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?fit=2537%2C1270" class="webfeedsFeaturedVisual wp-post-image" alt="" style="display: block; margin-bottom: 5px; clear:both;max-width: 100%;" link_thumbnail="" decoding="async" fetchpriority="high" srcset="https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=2537 2537w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=300 300w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=768 768w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=1024 1024w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=1536 1536w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=2048 2048w, https://www.edn.com/wp-content/uploads/Add-on-BFO_Figure3.jpg?w=1900 1900w" sizes="(max-width: 2537px) 100vw, 2537px" /><p>Expensive shortwave radios include beat frequency oscillators, so why not also add one to an inexpensive radio version?</p> <p>The post <a href="https://www.edn.com/add-on-beat-frequency-oscillator-bfo-for-shortwave-radio/">Add-on beat frequency oscillator (BFO) for shortwave radio</a> appeared first on <a href="https://www.edn.com">EDN</a>.</p>