TURAM system
Chris,
That was an excellent article on the VLF system and yes the last sentence was interesting. So now we're back to an inductive antenna if I read that correctly. In "Mining Geophysics" TURAM is used strictly for Ore bodies but that's what the book is all about.
As I mentioned earlier in this book a HORIZONTAL ~24" Ferrite bar mounted on a tripod as well as a 15'per side wire loop were used for VLF type of exploration. I would try the large diameter 24" ferrite as they can handle some wattage (as I have experimented on 183.5 K.C. with successfully). The ferrite bars are not prone to saturation as easily as a ferrite torroid which can be verified with the formulas.
For the reference signal here in the US I would use the little 400 MHZ transmitter-receiver boards that are so inexpensive.
Randy
|