{"height":"190","blog_url":"https://nobcha23.hatenadiary.com/","url":"https://nobcha23.hatenadiary.com/entry/2021/09/26/192241","published":"2021-09-26 19:22:41","provider_name":"Hatena Blog","author_name":"nobcha23","version":"1.0","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/n/nobcha23/20210926/20210926192045.jpg","type":"rich","title":"Studying R80 circuit diagram PART4 -IF, Mixer & DET\u3000 R80\u56de\u8def\u56f3\u306e\u7814\u7a76 \u305d\u306e4 \u7b2c\u4e00\u3001\u7b2c\u4e8c\u4e2d\u9593\u5468\u6ce2\u6570AMP\u3001\u30df\u30ad\u30b5\u30fc\u3001\u691c\u6ce2","description":"c. 1st IF AMP, 2nd mixer, 2nd IF AMP, and detecter MC3661 is working as the 1st IF AMP and also the 2nd mixer combined with 10.245MHz crystal oscillator. The output of MC3661 is fed into LT455 ceramic filter prior to TA7640.TA7640 is working for the 2nd IF AMP and the detecter. The output signal fro\u2026","categories":["R80\u30a8\u30a2\u30d0\u30f3\u30c9\u30ec\u30b7\u30fc\u30d0\u30fc\u30ad\u30c3\u30c8"],"author_url":"https://blog.hatena.ne.jp/nobcha23/","blog_title":"nobcha23\u306e\u30a8\u30a2\u30d0\u30f3\u30c9\u53d7\u4fe1\u6a5f\u81ea\u4f5c\u30d6\u30ed\u30b0 DIY airband receiver BLOG","width":"100%","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnobcha23.hatenadiary.com%2Fentry%2F2021%2F09%2F26%2F192241\" title=\"Studying R80 circuit diagram PART4 -IF, Mixer &amp; DET\u3000 R80\u56de\u8def\u56f3\u306e\u7814\u7a76 \u305d\u306e4 \u7b2c\u4e00\u3001\u7b2c\u4e8c\u4e2d\u9593\u5468\u6ce2\u6570AMP\u3001\u30df\u30ad\u30b5\u30fc\u3001\u691c\u6ce2 - 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>"}