This configuration similar to many of this site was found in 1965 General Electric documentation. Modern equivalent transistors can be used. LEDs can be used.
The figure shows how to use a CMOS amplifier as a crystal-controlled oscillator. The circuit is...
This circuit should be placed between a turntable and recorder or playback media from the input to...
Indicated by the Maxim Engineering Journal in the 90's edition, this circuit uses only one...