Suggested by a 90s Popular Electronics this circuit is intended to receive volleys or whistles from thunderstorms in the wave range below 20 kHz. The coil consists of 300 turns of wire 26 in a ferrite rod.
This circuit was sent by our longtime collaborator, Adriano Muniz Moura – Pirapora-MG. The...
This circuit was obtained from documentation from the 90s. The solution that can be found...
This transistor tester circuit is a little more sophisticated than the previous two (CB18918E and...