A Veritable Almanac!
The above diagram shows the blocks in a typical Tuned Radio Frequency (TRF) radio. This project uses the MK484 radio chip which has everything needed except the A.F. audio output stage.
The Ferrite Rod Aerial
The coil needs approximately 55 turns of 0.315mm diameter enamelled copper wire on a 100mm long ferrite rod. A process of trial and error will help you achieve the optimum number of windings on the ferrite rod.
In general the thicker the wire or larger the ferrite rod diameter the fewer the number of turns required.