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 a 1988 documentation, but the components used are still current. The...
This simple timer uses one of the six inverter ports on a CMOS integrated circuit. Rx and Cx...
With an output power of 1.5 W under a 12 V supply, this circuit makes use of transistors that are...