This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response of 150 Hz to 40 kHz. The power supply must be symmetrical.
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....
This circuit, in addition to providing an output that corresponds to the absolute value of the...
This circuit works with the previous two by demodulating the signals received modulated in FM. The...