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 amplifier stage was equipped with a Motorola radio from the 70s. The transistors were from...
This version of the preamplifier is one of many that the reader will find on this website using the...
This 13.8 V power supply with 10 A was found in a 1997 documentation. It is intended for the...