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 sends signals to a shortwave radio (range 3 to 7 MHz) at a distance of a few tens of...
When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a...
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...