http://www.docsdetecting.com/docsplace/coiltek/coils3.htmlDoc's Detecting Supplies
PROPER ADJUSTMENT: The thing you have to do with the Gold Screamer is to take a test nugget and place it on the ground, swing over it and adjust the volume of the Gold Screamer up, and now turn the threshold down, swing over again and turn the GS up, threshold down. Keep doing this until you get a sense of the best setting. What you are trying to do is to separate the threshold from the target sound as far as you can, so what you are looking for is a nice quiet threshold, but when you come across a small target it really jumps out from the quiet threshold. You are trying to move the threshold far to the left, to the quiet side, and the signal far to the right to the loud side.
It is so easy to do and make the gold, even the little stuff, just pop out from the threshold
IS THE BLUE BIRD MODEL JUST FOR "WHITES"??PLEASE,PLEASE, ASAP-----BUYING ONE NOW.