VLF reception on the PC

In the past, reception of utility stations at the low end of the radio spectrum typically required a suitable receiver or up-converter. Today, things are much simpler — just use a PC soundcard and a lot of wire.Any reasonably modern PC (Pentium 100 running Windows 95 or later) with a soundcard can be turned into a radio receiver for frequencies below 24 kHz (VLF range). This is possible without costly hardware or software additions. The only hardware you need to get your hands on is a suitable antenna. In the software department, all you need is a spectrum analysis program which is available free of charge.