Since 1989, The INSPIRE Project, Inc. has provided radio receiver kits to approximately 4,000 students and other groups internationally to make observations of signals from sources in the …

In it’s simplest form (and not so simple forms) a VLF receiver is nothing more than an audio amplifier attached to an antenna. One of the most popular uses for a VLF receiver is for …

INSPIRE VLF-3 Receiver The INSPIRE VLF-3 is the third version of the popular receiver used by students and others to observe Natural Radio and other Low Frequency emissions. This …

Since 1989, INSPIRE has provided radio receiver kits to over 4,000 students and other groups within the United States and internationally to make field observations of VLF signals. The …

This project is a receiver for base band radio signals using direct reception without frequency conversion. The frequency range from few Hz to beyond 10 kHz makes it suitable to receive …

The best feature of a VLF receiver is that it is already tuned for audio frequencies. Most Natural Radio or VLF Receiver circuits are tuned for ULF, ELF and VLF bands or 100 hertz to 15 …

Wouldn't it be nice to have a small receiver which can be carried in the pocket to listen to VLF signals spontaneously? The following receiver concept may give an idea how to build a tiny …

INSPIRE VLF-3 Radio Receiver Kit is the third version of the popular receiver used by students and other participants to observe Natural Radio and other Low Frequency emissions. This …

UltraMSK is a VLF radio receiver suitable for use in scientific research applications involving the remote sensing of the ionosphere or magnetosphere. UltraMSK measures both the phase and …

The VLF Receiver has a tuning range of about 12 kHz to 35 kHz, requires a supply of 15 Volts DC at 35mA, and provides output signals at 0 – 2.5 Volts and 0 – 5 Volts. It is designed to work …