This shortwave preselector was found in the July 1994 issue of Radio Electronics magazine. The circuit is suitable for telescopic antennas, matching the impedance with the receiver used.
Suggested by Maxim in documentation from the 90s, this circuit has its response curve given next to...
Using a mechanical drive motor, this circuit was found in old documentation. The engine turned off the...
This circuit shows how to use the 4060's various outputs for frequency division and achieving a...