The Coin Check feature is calibrated (or preset) at the factory to temporarily eliminate all signals with the conductivity of a zinc penny and below. It is preset at this value primarily for the typical coinshooter who does not like to contend with various aluminum trash such as chopped up aluminum cans, pull tabs, most screw caps, zinc pennies, etc. It is recommended to use the Coin Check feature to identify copper and silver coins at sites where you would not expect to find Indian Head pennies. Most experienced hunters will hunt with very low discrimination and will dig all small and smooth repeatable signals, especially the weaker or lower volume signals when hunting at older sites where it is possible to find Indian Head pennies. There are many lower conductive targets that are valuable at older sites such as military buttons, Civil War bullets, smaller silver, copper, nickel and gold coins. The exception to this is when the site has an over-abundance of modern aluminum trash (unless you have unlimited time, patience and energy or it is a highly productive relic site mixed with modern trash).

To recalibrate the Coin Check setting is a simple procedure. It requires a zinc penny, a #1 or #2 Phillips screwdriver and a very small flat blade screwdriver. 1) Remove the two Phillips screws, one on each side of the front panel. 2) Lift the front panel out carefully about half an inch. Looking at the front panel straight on, the adjustment control is attached to the back of the front panel at the upper left corner. The adjustment will be made with a small flat blade screwdriver. There is a rectangle 10 turn pot that can be adjusted from the left side of the control box. 3) Turn the control clockwise or counter-clockwise depending on your desired setting with the Coin Check button depressed and while waving a zinc penny close to the coil. Again, the factory setting is for the signal to be broken when waving the zinc penny within 2 inches of the coil. 4) Replace the front panel and the two Phillips screws. WARNING...do not over-tighten the screws as you will damage the decal or control box.

Hope this information will provide everyone with a little more insight as to the purpose, use and calibration of the Coin Check feature.

Troy Galloway