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, very traditional, was found in a practical Elettronica of 1977. The source cannot be of...
This circuit for analog video signals was obtained from a Linear Technology documentation from the 1990s. The...
This complementary transistor stage was found in a 1968 publication. The transistors are germanium types and...