Found in a 1968 Electronic Design, this circuit makes use of an unusual ultrasonic delay line today.
This circuit, from 1988 documentation, allows the use of 15 to 60 W dimmed lamps without the need...
This stage of IF to 455 kHz operates with voltages from 1.5 V. We find it in a 90s Popular...
This circuit for audio signals was found in the March 1990 Radio Electronics magazine. The circuit...