Found in an old Radio Electronics, this circuit applies to frequency meters for frequencies up to 100 MHz. The input impedance is in the order of 1 M ohm.
This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a...
This micro AM radio will tune strong stations in the frequency range between 530 and 1,600 kHz....
The circuit shown in the figure generates a signal between 50 and 100 MHz and can therefore be...