In the figure we have the way to obtain 500 gain from a FET. FETs can be BF245 or MPF102. The circuit is from the 1977 National Semiconductor FET Data Book. Power supply depends on the application.
This circuit for the 27 MHz or 11 meter-band had its assembly described in an article in Radio...
This circuit uses a feedback integrator. We found it in Ferranti's transistor manual from 1974....
This simple receiver was found in a book on transistors from 1954. The coil determines the...