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/ R80エアバンドレシーバーキット 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… 190 <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　 R80回路図の研究 その4 第一、第二中間周波数AMP、ミキサー、検波 - 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/nobcha23/20210926/20210926192045.jpg Hatena Blog https://hatena.blog 2021-09-26 19:22:41 rich https://nobcha23.hatenadiary.com/entry/2021/09/26/192241 1.0 100%