This circuit was found in documentation from the 1970s. However, it can be implemented with modern transistors such as 2N2222 for Q1 and BF494 for Q2. The crystal depends on the desired frequency.
This circuit was found in a 1990 Electronics World magazine. The circuit can be mounted today by...
The inverter circuit shown in the figure can be used to power a fluorescent lamp in an emergency...
We find this circuit in an American 1980s documentation. Modern equivalent integrated circuits can be...