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 is another of the Star Trek red alert circuit that you can find on this site. We took this...
This step was found in the 1960 Mullard transistor reference manual. The transistor can be a BC558...
We found this circuit in the November 1975 issue of Radio Electronics magazine. It uses a digital...