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 1965 General Electric manual. The components are from the period. Time...
This filter is from 1978 documentation. The source must be symmetrical and the gain in the center of...
This filter was found in the May 1989 issue of Radio Electronics magazine. The power supply must...