This JFET amplifier stage was found in the Encyclopedia of Electronic Circuits Volume 5 from 1995. Any JFET can be used and the bias controlled externally.
This circuit is from a 1997 English magazine, but it is very current due to the components it...
This system of sequential LEDs has its speed adjusted in a 1 M ohm potentiometer and this speed...
This is the commercial circuit for the TRF-44 amplifier sold in Japan in the 1960s. The circuit...