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 small transmitter operates in the medium wave range. T1 is an output transformer for...
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
The use of field effect transistors in this circuit improves its performance. This configuration is from a...