This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass band from 45 to 120 MHz.
This circuit doubles the frequency of an audio signal, thus changing its timbre. The circuit was...
This circuit was obtained in a Radio Shack documentation from 1977. The sensor must have a...
This circuit was found in a Popular Electronics from the 90's. The circuit's waveforms are given,...