This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a tachometric sensor for feedback. The current was not indicated in the original documentation.
This circuit for the 3.5 MHz band (80 meters) was found in an old radio amateur documentation. The circuit...
This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input...
We found this circuit in a Popular Electronics of the 80s. The circuit can be made with almost any...