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 The 1st local oscillator is MS5351 PLL managed by PIC18F1320. There is a rotary encoder to tune the frequency. We can select 100kHz or 10kHz step frequency by pushing the RE knob. The frequency is displayed on the front 7 segments 4 columns LEDs as 1215 at the case of 100kHz selected. Ａt the case of… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnobcha23.hatenadiary.com%2Fentry%2F2021%2F09%2F23%2F192728" title="Studying R80 circuit diagram PART3 -Mixer &amp;LO　 R80回路図の研究 その3 ミキサーと局部発振器 - 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/nobcha23/20210923/20210923194752.jpg Hatena Blog https://hatena.blog 2021-09-23 19:27:28 rich https://nobcha23.hatenadiary.com/entry/2021/09/23/192728 1.0 100%