fisher2 said:
so what i have to do is ignore the low tone right? what about the blank time inbetween iron hit and start of tone
Don't ignore the low tone, it is the same as the high tone it is the threshold..... Remember the excal will report a null and give you a tone for gold at the same time. When you get a null you should always recheck the null from a 90 degree angle from the original sweep. The excal will tell you if there is gold there, others want. I have found gold that way at the beach, pulled up gold ring and piece of iron in the same scoop.... Example sweep north to south get a null, sweep the null again east to west to be sure there is nothing there...... If you have a null and move on it will see a good target.....
Try a test, set your excal on a table, sweep it with a piece of iron, then gold, watch how fast it responds to the gold..... On both of mine no matter how fast I sweep it with gold after a piece of iron that nulls it always gives me a signal on the gold.... Sweep a piece of ground to be sure there are no targets there, take a gold ring, put a nail through it, set it on the ground and sweep it, you will get a null from one direction, sweep it at a 90 degree angle from the first sweep, you will get a tone for the gold........I have done this several times to show people how it works......