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 small transmitter operates in the medium wave range. T1 is an output transformer for...
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
The use of field effect transistors in this circuit improves its performance. This configuration is from a...