Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio Electronics magazine from October 1989. The coils are indicated.
This circuit from the 90s, was found in an Electronic Design of the time. The components used are...
This power inverter circuit was found in Radio Electronics magazine from December 1959....
The circuit presented is a Japanese commercial radio from the 1960s. With a 4.5 V supply, it is a...