Using a Signetics NE602, this converter tunes the 9.5- to 9.8-MHz range. An AM car radio is used as a
tunable IF amplifier. Output is taken from J2, the auto antenna. The crystal (XTAL1) can be a frequency about 1 MHz below the desired tuning range; for 9.5 to 9.8 MHz, an 8.5- to 8.8-MHz crystal should be used.