This circuit appeared in Amateur Radio Today in an issue and was found in a 1995 issue. The circuit is for the AM band up to 3 MHz. The transistors are general-purpose.
This application circuit for the AD6521C was found in Radio Electronics from the 90's. The circuit...
This regulator is based on the SFC2308 integrated circuit, which is quite old, therefore difficult to...
This circuit has an output that provides the average value of the rectified voltage. Operational...