AV multiband VLF receiver

[gold24h]

this is an interesting idea,i have some questions,which capacitor is selected for elf,such as 30 hertz,also how would you use this setup,are you looking for a drop in signal or an increase in signal,also there should be a way to filter out the 50 or 60 hetz utility signal from powerlines,that would make it a perfect elf receiver,i would like to experament with this but i do not understand how to use it,does treasure increase the signal or decrease it,is magnetic direction inportant also.