https://rfcorner.in/tags/onsemi-pzt2222a/Recent content in OnSemi PZT2222A on Dhiru's NotebookHugoenSun, 21 Sep 2025 00:00:00 +0000https://rfcorner.in/posts/single-transistor-lna-hf/Sun, 21 Sep 2025 00:00:00 +0000https://rfcorner.in/posts/single-transistor-lna-hf/<p>Note: This HF LNA design is inspired by Charlie Morris ZL2CTM's prior work.</p> <h2 id="design">Design</h2> <p>The idea that a single-transistor preamp with 10 dB gain is more than enough for HF comes from Gajendra Kumar (VU2BGS). As a new "designer," I am often overwhelmed by the different possible design paths, so guidance from an <code>elmer</code> is crucial.</p> <p><img alt="HF LNA 1" loading="lazy" src="https://rfcorner.in/images/HF-LNA-1.png"></p> <p><img alt="HF LNA 2" loading="lazy" src="https://rfcorner.in/images/HF-LNA-2.png"></p> <p>It seems even MMBT2222A should work for building a HF LNA!</p>