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.
This voltage-controlled oscillator generates signals from 0 to 1.4 kHz with the components...
This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit...
Found in technical documentation from National Semiconductor, this circuit provides a voltage of...