This simple general-purpose transistor mixer was taken from an article in Electronics Now magazine in March 1994. You can choose a low-noise transistor such as the BC549.
This circuit was obtained in an old European documentation. The integrated circuit used is...
The presented circuit is used to test ordinary fluorescent lamps. This circuit also has a mains...
Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The...