This is so reliable on the DFX you can learn to tell the difference between a Wheat Penny and a Silver Dime just by sound alone.ĮDIT: I just re-read your post and you might be referring to Tone ID. This also allows the decay of the tone to roll instead of being cut off sharp. The extended recovery time allows for a more robust response with a building ramp up in the tone. Exactly as you stated, why make the deep targets harder to hear with your DFX? My reference to "singing like a canary" is in regard to the quiet nature of the program in general. So as as a general rule I always turn this setting off.
I have tested this setting over many finds and could perceive no difference over good targets. This in effect gives you a perception of depth or in some cases size of the target. In theory with this setting turned on the weaker signals will elicit a quieter tone, and conversely the stronger signals will have a louder tone. What you are referring to is called the Modulation setting. What is the purpose of the quieter tone if you still see the same VDI info as a louder tone? Shouldn't the machine just tell you there is something there - why make it harder to hear. Both of you mentioned the volume of the signals. It will run very quiet, but when you hit that deep coin it will sing like a Canary. From what I've read, the stock program are a safety net and there is room for improvement. Its not that I want to walk the line of stability - I just want to get the depth that is advertised. Not all detectors can be adjusted to walk this line between stability and craziness, and some do it better than others. With experience you learn to tell the good deep signals among the noise when running your detector hot. That means you need to run it right on the edge of instability. If you're wanting to push your detectors depth to its limits, you will need to run it hot.
That alone will put you down deeper in moderate to low mineralized soil. Remember you are using a 12 inch concentric coil. Set your Swing Speed to 1 and really slow down your coil movement. I have dug plenty of deep targets with a PAG of 3 and a A.C of no more than 76. You may still get a good tone off of a nail tip, but if you turn 90 degrees and swing over the target you will see most of the time that it breaks up and shows a broad response pattern in the lower iron range. As I stated in the above PDF document if your digging to many nails adjust your VDI Sensitivity down a little and turn down your A.C. Lots of trash! I kept digging nails because they gave me a good signal! The house was originally built late 1700's, burned down and rebuilt in early 1800's. I experienced that first hand at one old site. I also like the example with the nail at the bottom. Originally Posted by Eraserhead View post