/technologies/open-source-hardware/b/blog/posts/building-a-transistor-audio-preamplifierIntroduction This blog post discusses a high quality three-transistor audio preamp, intended for speech applications such as radio or intercoms. The circuit was designed by michaelkellett and there is more detail at the blog page Two p...en-USTelligent Community 12https://community.element14.com/technologies/open-source-hardware/b/blog/posts/building-a-transistor-audio-preamplifierTue, 26 May 2026 19:26:26 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d20f2e52-15ce-4b77-a9e1-95e3fb434df5DAB0<p>Very interesting.</p> <p>That is a very good design for basic audio.</p><img src="https://community.element14.com/aggbug?PostID=29797&AppID=18&AppType=Weblog&ContentType=0" width="1" height="1">