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.
We found this circuit in an old documentation. It has a thermally compensated voltage reference. The...
Suggested by a Popular Electronics, this small amplifier that has a detector to follow RF...
The presented circuit generates a pulse whose delay in relation to the input depends on RC. These...