The INSPIRE VLF-3 Receiver is designed to receive radio waves in the 0-10 kHz range.I have assembled the rev. Has provided radio receiver kits to approximately 3,000 students and other groups internationally to make observations of signals from sources in the ionosphere at audio frequencies. Since 1989, The INSPIRE Project, Inc. INSPIRE VLF-3 RADIO RECEIVER KIT.
![]() Vlf Receiver Circuit Listen To Meteor Series And ParallelFluctuations of the recorded amplitudes and phases of these VLF transmissions are linked to the densities and to the altitudes of the D and E ionospheric layersThe PCB fits the case nicely and because I left the soldermask off of the edge on the back of the PCB, the back groundplane makes good contact with the aluminium case, providing more shielding.Initial tests with the upconverter were sort of successful (the magic smoke stayed in!), but I currently lack a a proper LF loop antenna to receive any stations with it. As we're talking about low frequencies, I hope that the added lead inductance doesn't screw things up too much.The ELF-VLF radio records contain natural events, but also several man-made VLF transmissions (military communications with submarines). You can see I have put on three monstrosities made from series and parallel combinations of capacitors to get the value I need.![]()
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