This volume compressor uses unusual components today. The circuit was found in documentation from the 1980s. The circuit is for audio signals. The LS150 is a high-performance operational amplifier.
This circuit has both frequency and duty cycle control. We found it in the October 1992 Radio...
This power supply is indicated for the supply of not very powerful car radios of the AM and FM...
In the absence of a modulation signal, the carrier of this simple short-range transmitter is cut...