Conductivity of Metals

[joecatch]

I am trying to understand why I haven't found any gold yet with my AT Pro. I also read recently here that setting the discrimination above 35 masks out some gold. So I went to the net and found the conductivities of different metals. The common ones are (in 10.E6 SIEMENS/M):

SILVER = 62.1
COPPER = 58.5
GOLD = 44.2
ALUMINIUM = 36.9
ZINC = 16.6
BRASS = 15.9
NICKEL = 14.3
IRON = 10.1

So then I matched up these numbers with the VDI readings of my AT Pro and they seem to line up pretty good with actual results. But they suggest that gold should come in right above pull tabs which are around 53-55. So in theory some gold should be between 53 (aluminium) and 80 (pennies).

Of course this does NOT take into account most of the stuff we find are alloys and not pure metal. And it doesn't say why discriminating out some iron masks out some gold. I have been passing up on targets in the 40's but will start to dig more hopefully to catch some gold instead of just foil! And I need to start digging more targets in the 60's too.

JC