This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be used. The maximum signal frequency for the indicated components is 250 kHz.
This circuit is from an Argentine publication from 1973. It generates a 100 kHz signal from a...
This filter was found in a 1975 American technical publication. The filter can be of any type and...
This circuit was found in a 90s American documentation. The circuit uses still common components...