Upon pressing the switch, the circuit generates a pulse whose duration depends on C. The transistors can be BC548 and the power can be between 1 and 6 V. The circuit is from a 1975 publication.
This circuit was found in a 1980s documentation. The indicated integrated circuits are uncommon...
This circuit uses a 455 kHz ceramic resonator or other frequency to set its operating frequency. The...
The circuit shown in the figure consists of an amplifier for stereo sources with Maxim's MAX9723...