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.
This circuit was found in a French publication in 1981, but it can still be assembled with only...
We found this circuit in an Argentine publication from the 1970s. The circuit can be used to...
This sophisticated repellent uses a double 555. We find it in an American documentation from the...