Using a Signetics NE602 in a varactor-tuned front end, the circuit of a shortwave receiver can be very simple and yet g
ive high performance. This circuit also uses a ceramic filter as a sensitivity-deteraiining device, two IF stages, AGC, and an audio amplifier. It has a sensitivity of under 1/iV. The table shows coil data for the frequencies from 5 to 16 MHz. The values Ci8, Ci9, and C23 depend on the frequency range chosen.