This circuit is from a 90s Popular Electronics. It consists of a power source for bass amplifiers of common types at the time that used symmetrical power and separating filters.
This circuit was found on a Radio Elettronica (Italy) from April 1974. The circuit can be easily...
This high-gain circuit was found in an American publication from the 1990s. The circuit can use...
This circuit that has excellent linearity using an NTC as a sensor was found in a European...