White’s Electronics Classic 1 SL - Manual (Page 8)

White’s Pulsescan Field Manual
USER GUIDE TO PROSPECTING
by ...
Digger Bob
GETTING STARTED -
The new Whites TDI has so much potential and variables, that trying to come up with a hunting technique that works
the same every time is almost impossible. But having said that, here’s how I get started:
GAIN - 6. Start here and increase later if you can.
PULSE - 10
GROUND BALANCE SWITCH - ON
GROUND BALANCE -
Most gold bearing ground is mineralized and I have found just about everywhere I have used this machine, the
ground balances somewhere between 8 and 9, even pure serpentine. Very mild clays or slate may balance out
around 3, but this is the exception. I start with the Ground Balance at 8 and pump the loop up and down to make
sure. Then I can make a small adjustment to get it exact; no change between the air and ground.
THRESHOLD -
Usually about straight up. Set to your comfort level with headphones, low and steady sound.
FREQUENCY -
Straight up, 12:00. I’ve not had a situation yet where I had to change it.
CONDUCTIVITY -
Low. More on that later...
The detector is now set for most conditions you will encounter.
Lower the loop to the ground and start swinging, low and slow. Make note of any targets and the steadiness of
the threshold. Before you dig anything, try to increase the gain to Max. In the Low or High conductivity setting the
threshold should remain fairly steady even at Max gain. It will wobble a little, but one can still hunt. Beginners should
probably stick with the gain at 6 until they get used to the variable sounds. Hunting in the All position will be more
erratic and make it harder to concentrate on the different sounds.
Starting off in the Low setting, all you will hear is high tone sounds on targets. This does not necessarily mean they
are all gold nuggets! Most targets you are going to hear at these settings are lead bullets and brass casings from .22
caliber shells, small flat pieces of iron, and some nails. There are other things out there, but these are the most com-
mon. Larger iron, aluminum, lead, brass, and yes, very large gold nuggets you won’t hear at these settings. In the
High setting, you will hear those big nuggets as a low tone, along with all the big iron and other things. For what it’s
worth, larger nuggets tend to be deeper so the sound will be softer, more mellow, than the loud screaming signal from
near surface iron. Again, gold doesn’t follow the rules!
There are a couple of things you can do to test a target before you dig it. About the only thing you can do is analyze
signals from nails. Nails are long and will give a sound or no sound depending on what direction the loop passes