This LED flasher was described in the Radio Electronics Experimenter magazine special issue of 1989. It was designed to be assembled with SMD components.
Found in Precision Monolithics documentation from the 90's, this circuit equalizes octave signals...
This nice analog indicator circuit was found in the January 1974 issue of Radio Electronics...
This small amplifier, with output less than 1 W, was found in a 1960 transistor manual from...