00:00 Introduction
00:41 AM Radio IC LA1600
01:32 What is AM modulated wave?
02:30 Problems with Germa Radio
03:00 Performance limits of 3-terminal AM radio IC
03:57 Explanation of superheterodyne method
06:25 Super heterodyne radio using LA1600
07:46 Manufacturing of boards and circuits
13:48 What is tracking adjustment?
16:39 Simple adjustment
18:33 Adjustment using frequency counter
20:42 Production of audio amplifier
21:12 Manufacturing a board by cutting a copper foil board
23:04 Production of audio circuit
24:17 Ceramic filter sound quality comparison
25:59 Homemade radio with a unique tuning dial
Physical wiring diagram
http://www.i-berry.ne.jp/~nakamura/pdf/otogayokutekandomoyoiAMrajio.PDF
Ceramic filter 450kHz ±15kHz LTM450BW
Ceramic filter 450kHz ±2kHz LTM450IW
https://akizukidenshi.com/goodsaffix/lt.pdf
VOICEVOX: Shuji Susumatsu
I used it.
FREE BGM From DOVA-SYNDROME
Margaret in the library
I used it.