Individuals have lengthy been desirous about very low frequency (VLF) radio indicators. Nevertheless it was once you just about needed to construct your individual receiver which, fortunately, wasn’t as exhausting as constructing your individual VHF or UHF gear. However there’s a downside. These low frequencies have a really lengthy wavelength and, thus, want very giant antennas to get any reception. [Electronics Unmessed] says he has a solution.
As of late, if you wish to discover any a part of the radio spectrum, you’ll be able to most likely do it simply with a software-defined radio (SDR). However the antenna is the important thing half that you’re most likely missing. A small antenna is not going to work nicely in any respect. Whereas the video covers a reasonably frequent concept: utilizing a loop antenna, his method to loops is a bit completely different utilizing an identical transformer, and he backs his ideas up with modeling and sensible outcomes.
After all, transformers additionally introduce loss, however — as at all times — all the things is a trade-off. Operating lots of of toes of wire in your yard and even in a loop just isn’t at all times a risk. This antenna appears to be like prefer it offers good efficiency and it could be easy to duplicate.
Early radio was VLF. Seems, VLF might present an surprising public service in house.
