This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can generate 20 to 100 MHz signals operating at the fifth harmonic of the crystal.
This circuit was found in an old 1970s telecommunication documentation. It is suitable for...
Suggested by General Electric in a 1967 publication, this circuit makes use of an SCR of the time....
This circuit allows selective relay actuation in the same line according to the applied voltage....