Found in Popular Electronics from the 90s, this circuit consists of a timer that turns off the power of a circuit after a time determined by C1, saving the battery.
This amplifier for public address was found in English documentation from 1967. The transistors are from...
January 2017 - Pulse Electronics ER11 transformers with high insulation can be obtained from...
With only 1% distortion, this Motorola amplifier found in a 1968 documentation makes use of period...