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Retune speed in prospecting mode
- Thread starter margiop
- Start date
TURNMASTER
Active member
I'm not sure it will NULL out the target, but I don't have hardly any time runing that option.
HH
Jeff
HH
Jeff
It won't null out the target. Its a single tone that increases in pitch as you near and then hover over the target. The Iron Mask is designed to ignore iron, up to a point. It will give you max depth with the machine, but won't ID anything and setting IM too high will kill the depth advantage. Some people use it to locate deep targets and then switch over into Coin/Treasure to see if they can still hear it, if it disappears when you switch, its obviously a deep signal and might be worth investigating if you're relic hunting. You can also use it as a tool to see how many targets you have as it will separate real well. One of the ways I like to use it is to increase the depth potential on the 6" DD coil in an established Civil War picket post. I pick an area of about 10 X 10 and clear out as much of the iron as I can, using the stock coil and C/T mode. Then switch over to the 6" and prospecting mode and dig everything in that 10 X 10 area. However, in a picket post you miss a lot if you don't systematically remove the iron.
If you are capable of holding your coil "perfectly still", I'd guess that you can null out a target. The reason I say that I'd guess because I've not been able to hold a coil that still. But, if hold your detector upside down, and you lay a piece of non-conductive material (like several layers of cardboard) target directly on the coil, then lay a coin on the cardboard, the X705 will null out after a short period of time. (the reason to use the cardboard is to reduce overloading signals) The time it takes to null is relative to the size of the target and what part of the coil that the target is on. But if you have the slightest bit of shake in your hand, and the target moves, it will produce another audio signal. I know you weren't talking about Iron Mask, but the "nulling" also seems to vary with the amount of Iron Mask that is applied and the ferrous content of the target. Lower iron mask settings seem to have a quicker response time, making it more difficult to "null out the tone". Higher iron mask settings have more of a blanking effect (on targets with lower ferrous content) instead of what we typically think of as nulling. Therefore, with higher iron mask settings, the audio tone produced by more ferrous targets will "go away". But again, I believe that is due to blanking more than nulling.
If you have your detector out and are trying the test I outlined above, here is another interesting "test" that you can do with the X-Terra. I made mention of this with the PinPoint mode on the X-70 several years ago. In Prospect Mode, wave a target under the coil at a given distance. Say 6 inches. Now, move the target closer to the coil as you wave it back and forth. Notice you will get the same increase in tone and probably more audio volume as it gets nearer the coil. Now, while holding the coil perfectly still, listen for the "nulling" that you asked about. Holding the coil steady, move it straight away. You will probably lose the target audio completely. The point is, as I said with Pinpointing on the X-70, the detector will not provide audio signal when you lift the coil straight away from that target. In other words, if you are pinpointing mode, the target will make an audio tone as you keep the distance consistent, or move the target closer to the coil. But, if you move the coil farther away from the target while keeping the target in the same location in relation to the surface of the coil, the sound will disappear. When that happens, you will either have to wait for the detector to reset (a couple seconds) or go out of mode and back in again. In Prospecting mode, you simply sweep the coil over the target again and it will reset on it's own. JMHO HH Randy
If you have your detector out and are trying the test I outlined above, here is another interesting "test" that you can do with the X-Terra. I made mention of this with the PinPoint mode on the X-70 several years ago. In Prospect Mode, wave a target under the coil at a given distance. Say 6 inches. Now, move the target closer to the coil as you wave it back and forth. Notice you will get the same increase in tone and probably more audio volume as it gets nearer the coil. Now, while holding the coil perfectly still, listen for the "nulling" that you asked about. Holding the coil steady, move it straight away. You will probably lose the target audio completely. The point is, as I said with Pinpointing on the X-70, the detector will not provide audio signal when you lift the coil straight away from that target. In other words, if you are pinpointing mode, the target will make an audio tone as you keep the distance consistent, or move the target closer to the coil. But, if you move the coil farther away from the target while keeping the target in the same location in relation to the surface of the coil, the sound will disappear. When that happens, you will either have to wait for the detector to reset (a couple seconds) or go out of mode and back in again. In Prospecting mode, you simply sweep the coil over the target again and it will reset on it's own. JMHO HH Randy