Suggested by a 1990 book for amateurs, this circuit makes use of an integrated component that is not common today. It converts signals from one band to signals in a 10.7 MHz band below.
This 1980s circuit was found in Motorola documentation. The circuit uses period components that admit of...
This circuit was obtained in a documentation from the 90's. Several common operational amplifiers...
This simple 3-channel passive mixer can be used with low-intensity signal sources but requires...