nobcha23のエアバンド受信機自作ブログ DIY airband receiver BLOG

エアバンドレシーバーキットの組み立て、改造を手掛けます Assemble and remodel Chinese airband receiver kit

2021-09-26から1日間の記事一覧

Studying R80 circuit diagram PART4 -IF, Mixer & 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

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 worki…