This circuit works as a booster operating with signals from 1 to 30MHz. The gain is between 1 and 20dB. The circuit is from the 1990 edition of Radio Electronics Experimenter magazine.
This small amplifier with a low impedance microphone that can be used for hearing aid was found in a...
Found in Popular Electronics, this circuit is intended for testing servos used in model making. The...
This timer circuit was found in a 1980s American documentation. Transistors and SCR support modern...