BarnacleBill
New member
Fine thank you.
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Back to the future part 2. Tried this yesterday and it got lost in transit
- Thread starter NH Bob
- Start date
BarnacleBill
New member
Pull off effect.
Let's say you are standing in a field with no targets in the ground except a small paint can lid that is 8 inches deep. The lid has rusted around the outer edges so that it is an irregular sawtooth pattern. On most VLF machines as you swing towards the lid the tone ID will chirp high tone and the audio response will be ratty sounding. As your swing continues over the lid and centers on it the detector should null(go silent) if you have iron Disc'd out. As you continue your swing passing the outer edge there will be a slight delay as the detector comes out of that null and chirps a high tone. That delay effect is what I call Pull off.
Let's say you are standing in a field with no targets in the ground except a small paint can lid that is 8 inches deep. The lid has rusted around the outer edges so that it is an irregular sawtooth pattern. On most VLF machines as you swing towards the lid the tone ID will chirp high tone and the audio response will be ratty sounding. As your swing continues over the lid and centers on it the detector should null(go silent) if you have iron Disc'd out. As you continue your swing passing the outer edge there will be a slight delay as the detector comes out of that null and chirps a high tone. That delay effect is what I call Pull off.
Jackpine Savage
Active member
BB said:
Bubber what Bill is describing is the effect of a 'cold rock'. Hot rocks give a response like a valid target while cold rocks due to their particular type of mineral content, signal on the approach and departure of the coil and null over the center. This is sometimes described as a 'boing type of sound' response.
Using all metal mode smaller cold rocks will allow targets to be heard when on top of or under the rock. Hot rock responses can be lessened with proper ground balancing but doing so will also reduce the response of valild targets. Most hot rocks that give a response are located on or near the surface and easy to ID by sight.
Tom
Jackpine Savage
Active member
BarnacleBill
New member
n/t
TURNMASTER
Active member
The bottom line for me is that Tracking is good. Use care though, not to track out a target, because of to many passes or to much sensitivity.
When I do not dig the Boing target I feel I may have left something benind. You can not rush expierence.
Jeff
When I do not dig the Boing target I feel I may have left something benind. You can not rush expierence.
Jeff
Very interesting test, I have not fiddled much with the IM in prospect but the more I hear good results the more interested I am in using it. I typically hunt in All Metal in daylight and prospect at night, switching to AM for ID. I think I will try a hunt where only 10 thru 26 is accepted at night but probably will have too many nulls, maybe prospect and then switch to C & J with 10-26 accept as I waste too much time digging pennies and we have almost no old silver where I am. For those of you who do not use All Metal you are undoubtedly missing some good targets, I hunt school playgrounds that have been pounded and am able to pick up coins n stuff next to iron that others miss. If you only hunt C & J you will not hear these targets.