This crystal oscillator is indicated for the calibration of IF steps of common radio receivers. The transistor admits equivalent as 2N2222 or BF494. The circuit is from an old American publication.
We find this circuit in a 1970s documentation on operational amplifiers. The setup is true for...
We obtained this circuit from the 1977 National Semiconductor FET Databook. The frequency depends only...
This circuit was obtained from a European magazine of the 1990s. The integrated circuit used is...