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 two-transistor circuit is from a Radio Electronics magazine from April 1965. The transistors are...
This 2 meter (144 MHz) preamplifier is intended for use with portable transceivers. The...
This circuit is of great use today, when solar energy is becoming increasingly important. The...