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.
We found this circuit in an American publication from the 1990s. The triac must be equipped with a heat...
This transistorized astable for LEDs was found in the January 1992 issue of Radio Electronics...
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...