Mr.Nixie's Magilyzer with EM800 tubes from channel mixer amplifier Watch Video
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Description: The Magilyzer is an analog audio spectrum analyzer, based around the BA3830S amplifier IC. It offers 6 selective audio bands for display: 63 Hz, 150 Hz, 330 Hz, 1 kHz, 3.3 kHz and 10 kHz.nnThe principle is the same as my