Although it uses a dual-channel FET, which is hard to find today, this circuit was released in a Radio Electronics issue in April 1986. It serves as a signal booster for a wide range of frequencies.
This circuit is tuned to reject stations of different wave bands that may be interfering with the...
Found in a 1965 Electronic Design, this circuit divides the frequency of a 50 MHz signal by 2. The...
We found this circuit in a 1976 documentation, but it can still be easily assembled using BC548...