This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's documentation. The circuit has an input for frequency modulation.
This circuit was found in the July 1982 issue of Radio Electronics magazine. The integrated...
This circuit was found in an American documentation from the 1980s. The sensitivity ranges from...
This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply...