The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM receiver. Adjust R4 for the best sound. The coil has 20 + 60 turns of wire 28 in a ferrite rod.
The interesting circuit shown in the figure, can have its gain digitally controlled and present two...
This circuit that has a response from 10 Hz to 700 kHz was found in Philips documentation from 1968. Dual...
This circuit is from a 1976 Motorola CMOS manual. It can be implemented with modern Darlingtons like...