This filter was found in an 80's English publication. However, it can be implemented with modern operating systems. The circuit can tune frequencies in a range from 10,000 to 1.
The FAN1117A and FAN1117A-5 integrated circuits from Fairchild consist of fixed and adjustable...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...
This sensitive receiver with earphone was found in an English documentation from 1963. The...