https://rfcorner.in/tags/10w/Recent content in 10W on Dhiru's NotebookHugoenTue, 18 Aug 2026 00:00:00 +0000https://rfcorner.in/posts/qro-rf-amplifier-2026/Tue, 18 Aug 2026 00:00:00 +0000https://rfcorner.in/posts/qro-rf-amplifier-2026/<h2 id="related-work">Related work</h2> <ul> <li><a href="https://rfcorner.in/posts/baby-qro-switching-amplifier/">Baby QRO Switching RF amplifier for HF</a></li> <li><a href="https://rfcorner.in/posts/digitally-adjustable-pa-supply/">Digitally Adjustable RF PA Supply</a></li> </ul> <p>A new generation of the <code>Baby-QRO switching amplifier</code> targets 10 W to 500W+ of RF output for <code>FT8</code> and other FSK modes.</p> <h2 id="design">Design</h2> <p>This design comes from <code>AI7SG</code> - thank you!</p> <script type="text/javascript" src= '/js/pdf-js/build/pdf.js'></script> <style> #embed-pdf-container { position: relative; width: 100%; height: auto; min-height: 20vh; } .pdf-canvas { border: 1px solid black; direction: ltr; width: 100%; height: auto; display: none; } #the-canvas { border: 1px solid black; direction: ltr; width: 100%; height: auto; display: none; } .pdf-loadingWrapper { display: none; justify-content: center; align-items: center; width: 100%; height: 350px; } .pdf-loading { display: inline-block; width: 50px; height: 50px; border: 3px solid #d2d0d0;; border-radius: 50%; border-top-color: #383838; animation: spin 1s ease-in-out infinite; -webkit-animation: spin 1s ease-in-out infinite; } #overlayText { word-wrap: break-word; display: grid; justify-content: end; } #overlayText a { position: relative; top: 10px; right: 4px; color: #000; margin: auto; background-color: #eeeeee; padding: 0.3em 1em; border: solid 2px; border-radius: 12px; border-color: #00000030; text-decoration: none; } #overlayText svg { height: clamp(1em, 2vw, 1.4em); width: clamp(1em, 2vw, 1.4em); } @keyframes spin { to { -webkit-transform: rotate(360deg); } } @-webkit-keyframes spin { to { -webkit-transform: rotate(360deg); } } </style><div class="embed-pdf-container" id="embed-pdf-container-d4a08267"> <div class="pdf-loadingWrapper" id="pdf-loadingWrapper-d4a08267"> <div class="pdf-loading" id="pdf-loading-d4a08267"></div> </div> <div id="overlayText"> <a href="https://rfcorner.in/pdfs/QRO-RF-Amplifier-2026.pdf" aria-label="Download" download> <svg aria-hidden="true" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18"> <path d="M9 13c.3 0 .5-.1.7-.3L15.4 7 14 5.6l-4 4V1H8v8.6l-4-4L2.6 7l5.7 5.7c.2.2.4.3.7.3zm-7 2h14v2H2z" /> </svg> </a> </div> <canvas class="pdf-canvas" id="pdf-canvas-d4a08267"></canvas> </div> <div class="pdf-paginator" id="pdf-paginator-d4a08267"> <button id="pdf-prev-d4a08267">Previous</button> <button id="pdf-next-d4a08267">Next</button> &nbsp; &nbsp; <span> <span class="pdf-pagenum" id="pdf-pagenum-d4a08267"></span> / <span class="pdf-pagecount" id="pdf-pagecount-d4a08267"></span> </span> <a class="pdf-source" id="pdf-source-d4a08267" href="https://rfcorner.in/pdfs/QRO-RF-Amplifier-2026.pdf">[pdf]</a> </div> <noscript> View the PDF file <a class="pdf-source" id="pdf-source-noscript-d4a08267" href="https://rfcorner.in/pdfs/QRO-RF-Amplifier-2026.pdf">here</a>. </noscript> <script type="text/javascript"> (function(){ var url = '\/pdfs\/QRO-RF-Amplifier-2026.pdf'; var hidePaginator = "" === "true"; var hideLoader = "true" === "true"; var selectedPageNum = parseInt("") || 1; var pdfjsLib = window['pdfjs-dist/build/pdf']; if (pdfjsLib.GlobalWorkerOptions.workerSrc == '') pdfjsLib.GlobalWorkerOptions.workerSrc = "https:\/\/rfcorner.in\/" + 'js/pdf-js/build/pdf.worker.js'; var pdfDoc = null, pageNum = selectedPageNum, pageRendering = false, pageNumPending = null, scale = 3, canvas = document.getElementById('pdf-canvas-d4a08267'), ctx = canvas.getContext('2d'), paginator = document.getElementById("pdf-paginator-d4a08267"), loadingWrapper = document.getElementById('pdf-loadingWrapper-d4a08267'); showPaginator(); showLoader(); function renderPage(num) { pageRendering = true; pdfDoc.getPage(num).then(function(page) { var viewport = page.getViewport({scale: scale}); canvas.height = viewport.height; canvas.width = viewport.width; var renderContext = { canvasContext: ctx, viewport: viewport }; var renderTask = page.render(renderContext); renderTask.promise.then(function() { pageRendering = false; showContent(); if (pageNumPending !== null) { renderPage(pageNumPending); pageNumPending = null; } }); }); document.getElementById('pdf-pagenum-d4a08267').textContent = num; } function showContent() { loadingWrapper.style.display = 'none'; canvas.style.display = 'block'; } function showLoader() { if(hideLoader) return loadingWrapper.style.display = 'flex'; canvas.style.display = 'none'; } function showPaginator() { if(hidePaginator) return paginator.style.display = 'block'; } function queueRenderPage(num) { if (pageRendering) { pageNumPending = num; } else { renderPage(num); } } function onPrevPage() { if (pageNum <= 1) { return; } pageNum--; queueRenderPage(pageNum); } document.getElementById('pdf-prev-d4a08267').addEventListener('click', onPrevPage); function onNextPage() { if (pageNum >= pdfDoc.numPages) { return; } pageNum++; queueRenderPage(pageNum); } document.getElementById('pdf-next-d4a08267').addEventListener('click', onNextPage); pdfjsLib.getDocument(url).promise.then(function(pdfDoc_) { pdfDoc = pdfDoc_; var numPages = pdfDoc.numPages; document.getElementById('pdf-pagecount-d4a08267').textContent = numPages; if(pageNum > numPages) { pageNum = numPages } renderPage(pageNum); }); })(); </script> <p>Note: We can shift to the much faster <code>TI LMG1210</code> driver and EPC GaN FETs once their availability improves!</p>