Suggested by Siliconix in documentation from the 90s, this amplifier has its gain digitally selected. The components are from that time, not easy to find today.
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
This circuit is from an American 1967 documentation and can be implemented with modern equivalent...
This RF circuit measures transmission power from 0.25 W to 10 W. The maximum frequency depends on...