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.
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...
Although modern integrated versions exist, this 1995 circuit shows a discreet solution with common...
This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz...