Makes sense. Mid-conductors like the higher frequency, those look mostly like mid-conductors. Can't be sure just from the pic, but doesn't look like any high conductors (e.g. silver, pure copper).
I hunted in a high emi area today in 54 kh and 74 kh and it worked well, its a place that renders detectors useless..
I hunted in a high emi area today in 54 kh and 74 kh and it worked well, its a place that renders detectors useless..