nobcha23 https://blog.hatena.ne.jp/nobcha23/ nobcha23のエアバンド受信機自作ブログ DIY airband receiver BLOG https://nobcha23.hatenadiary.com/ This article is re-edited from the former post. The pop sound is coming out when the squelch is on/off. AGC voltage and squelch volume tuning voltage are compared by LM358 and the circuit is muting RX sound signal at LM386 input nevertheless LM386 is active. Then a signal is faded but Pop noize is g… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnobcha23.hatenadiary.com%2Fentry%2F2021%2F06%2F12%2F214410" title="How to improve squelch feeling for Chinese air band receiver kit 中国製エアバンドレシーバーキットのスケルチフィーリング改善 - nobcha23のエアバンド受信機自作ブログ DIY airband receiver BLOG" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> https://cdn-ak.f.st-hatena.com/images/fotolife/n/nobcha23/20210612/20210612212929.jpg Hatena Blog https://hatena.blog 2021-06-12 21:44:10 rich https://nobcha23.hatenadiary.com/entry/2021/06/12/214410 1.0 100%