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.
Other operational amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...
We can use this circuit to connect low impedance microphones and even small speakers used as a...
September 2016 - It can be purchased from Mouser Electornics the iW1818 of Dialog Semiconductor, a...