{"provider_url":"https://hatena.blog","blog_title":"nobcha23\u306e\u30a8\u30a2\u30d0\u30f3\u30c9\u53d7\u4fe1\u6a5f\u81ea\u4f5c\u30d6\u30ed\u30b0 DIY airband receiver BLOG","url":"https://nobcha23.hatenadiary.com/entry/2021/09/29/194316","published":"2021-09-29 19:43:16","image_url":null,"height":"190","version":"1.0","title":"Studying R80 circuit diagram PART5 Squelch and audio circuit\u3000 R80\u56de\u8def\u56f3\u306e\u7814\u7a76 \u305d\u306e5 \u30b9\u30b1\u30eb\u30c1\u3001\u97f3\u58f0\u5897\u5e45\u56de\u8def","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnobcha23.hatenadiary.com%2Fentry%2F2021%2F09%2F29%2F194316\" title=\"Studying R80 circuit diagram PART5 Squelch and audio circuit\u3000 R80\u56de\u8def\u56f3\u306e\u7814\u7a76 \u305d\u306e5 \u30b9\u30b1\u30eb\u30c1\u3001\u97f3\u58f0\u5897\u5e45\u56de\u8def - nobcha23\u306e\u30a8\u30a2\u30d0\u30f3\u30c9\u53d7\u4fe1\u6a5f\u81ea\u4f5c\u30d6\u30ed\u30b0 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>","author_name":"nobcha23","categories":["R80\u30a8\u30a2\u30d0\u30f3\u30c9\u30ec\u30b7\u30fc\u30d0\u30fc\u30ad\u30c3\u30c8"],"blog_url":"https://nobcha23.hatenadiary.com/","description":"After FM62429 variable attenuator the audio signal is going to LM386 amp.The same signal is going to the MC3661 filter amp and detector. MC3361 is naturally the FM receiver IC and this receiver is using filter amp for detected signal AMP to open the channel when the signal detects. I'm somehow wonde\u2026","width":"100%","type":"rich","author_url":"https://blog.hatena.ne.jp/nobcha23/"}