An improved crystal radio with a two-stage audio amplifier. The 2N3904 (or any other general-purpose NPN) acts as a preamplifier while the LM386 boosts the signal high enough to drive low impedance Walkman headphones or perhaps even a small speaker.
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This entry was posted on Friday, November 9th, 2007 at 9:54 pm and is filed under RF-Radio Frequency. You can leave a response, or trackback from your own site.
