The circuit is a multivibrator version using two NPN general purpose transistor. This circuit can run in frequencies up to 50 MHz when usind the recommended transistors. The power suppply can range from 6 to 12 V. The capacitor can be changed to other frequencies. Inverting the power supply polarity, the circuit can be made using PNP transistors.
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Bellow the waveshape displayed in the virtual oscilloscope of the MultiSIM Blue. See the adjusments for better display. The frequency is about 1.5 kHz wth the recommended capacitor.
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To download the simulation files and Netlist - click here (msb0019e.zip)