We find this oscillator in a 1980s documentation. The frequency depends on the crystal and the transistor used must be able to oscillate at the desired frequency.
August 2017 - The new refrigeration sensors for use in batteries, cooling systems of Amphenol...
This circuit is intended for the production of an audible signal from the capture of a continuous...
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....