This circuit was obtained in a 90s 73 magazine for radio amateurs. The power transistor must have a heat sink. The input voltage is 13.6 V.
We found this circuit in the 1983 Radio Electronics Special projects magazine. The components are...
With the presented circuit it is possible to detect signals from transmitters in a frequency range...
This circuit was found in a British documentation from 1969. It can be implemented with modern...