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.
This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit...
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
Found in the 1995 Encyclopedia of Electronic Circuits volume 5, this circuit has a constant...