Hello Kelly, i have some homebrew prototypes like this,( all own designs) and anothers sondes to vlf natural sounds, not professional construction, but, receives very good ! We can talk about it, you can write me to ea1hbx@gmail.com . (You can try do yourself one , the schematic is published) .Thanks!😉
WOW
Are your receivers home made or can I buy one?
Hello Kelly, i have some homebrew prototypes like this,( all own designs) and anothers sondes to vlf natural sounds, not professional construction, but, receives very good ! We can talk about it, you can write me to ea1hbx@gmail.com . (You can try do yourself one , the schematic is published) .Thanks!😉