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Low pass AF Filter Experiments - QRP Homebuilder
瀏覽：1330
日期：2025-05-16
At audio frequencies, low pass filtering can go a long way to improving CW and beacon reception. It has a been a long time since I built one and therefore decided to experiment with some designs using the 5532 op amp. EMRFD has a great section on RC activ...看更多
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