Negative signals.......what are they?

[Tassie Daz]

Hi all. Was just reading on old post from another forum [I think it was from back a few years ago} and came across a term that intrigued me. The post included some discussion about a guy who had "talked to some guys around a camp fire at the Waanyarra campground the night before I/he found It [a lump of gold], and they told me/him about "negative signals". What are these "negative signals" and do they still exist with the newer more sophisticated detectors of today? Are they, or could they be the signals given off by the mineralised clay so common in the Goldfields of Victoria. Good to hear any comments. TD

 

[trashmagnet]

g'day
I will assume your talking about the slight pause in threshold with no signal, if so
they happened when detectors used analog (gp3500 and before)system for the sound, they don't seem to happen with digital (gpx4000 onwards).

it's when the threshold goes silent for a split second, it happened so fast you don't seem to hear happen, you just knew something was happening in the same spot each swing.
they turn into positive signals after digging down abit.
regards tm

edit...... they happened because the target was at the most extreme the detector could get it for the targets size, but there was not enough signal to push through the threshold,

 

[loamer]

For a real tech description follow link. Good luck mate - interesting question.

http://www.minelab.com/__files/f/11043

 

[Goldtarget]

Cheers loamer.... mate what you have stored in print and in that noggin of yours must be staggering. I'm sure if we ever sat down for a chat I'd make more sense about the Pies than than the gold. Best part is your willingness to share and guide. Thanks again.

 

[HeadsUp]

Cheers loamer.... mate what you have stored in print and in that noggin of yours must be staggering. I'm sure if we ever sat down for a chat I'd make more sense about the Pies than than the gold. Best part is your willingness to share and guide. Thanks again.

yeah true gold . wish i understood all of it but it will come in time

 

[peterau]

Go the Pies. My new van, black and white in and out and magpies all around. Missus calls it the Rocca

 

[Jaros]

Don't know about the Pies mate but a nice looking van.

 

[PhaseTech]

Hi all. Was just reading on old post from another forum [I think it was from back a few years ago} and came across a term that intrigued me. The post included some discussion about a guy who had "talked to some guys around a camp fire at the Waanyarra campground the night before I/he found It [a lump of gold], and they told me/him about "negative signals". What are these "negative signals" and do they still exist with the newer more sophisticated detectors of today? Are they, or could they be the signals given off by the mineralised clay so common in the Goldfields of Victoria. Good to hear any comments. TD

Just a thought, they may have been referring to low-high or dipping signals, which are common with larger/deeper targets.

 

[Goldtarget]

It's probably not helpful to post but an observation I have mate Coin shooting ( they are metal detectors after all) is often just out of audible reach of my coil the threshold drops away at the target response usually on scraping back I'll get a steady detectable signal one the depth is within the audible detecting range. So instead of a signal being heard within my headphones it's a lack of our more correctly negative signal I'm listening to to tell me something is beneath the coil. Often at 10 inch using the 11x5 DD this is the case and has nested some sweet returns. I hunt all metal and once I'm sure I've hunted it out I go back and adjust the volume and threshold back the sensitivity of a couple of points and gb to slight negative ands hunt the depths like this. A repeated non signal like this is what I would term negative signal detecting. It's often used in pi machines as I understand to.

 

[TTKooAu]

Loamer... we got spanked yesterday... not a happy camper. Sorry to interrupt the topic, Daz.

 

[trashmagnet]

Hi all. Was just reading on old post from another forum [I think it was from back a few years ago} and came across a term that intrigued me. The post included some discussion about a guy who had "talked to some guys around a camp fire at the Waanyarra campground the night before I/he found It [a lump of gold], and they told me/him about "negative signals". What are these "negative signals" and do they still exist with the newer more sophisticated detectors of today? Are they, or could they be the signals given off by the mineralised clay so common in the Goldfields of Victoria. Good to hear any comments. TD

Just a thought, they may have been referring to low-high or dipping signals, which are common with larger/deeper targets.

I thought that may be the case at first nenad, but they have been called inverted signals as long as I can remember. even more so when rohan accidently wired up a coil back to front and in doing so invented the xp coil.
regards tm

 

[Tassie Daz]

Thanks fellas, I'd never heard of the term before.....but then I really don't read technical stuff to often. All I really wanted to understand what the term meant and how it applied to what we do. If it means it affects what I do when detecting and how that might change my outcomes then its good to know about. Thanks .

 

[Tassie Daz]

hey TTKooau, don't worry about interrupting a post with footy mate. You got belted and my crowd lost a game they should never have lost. Just goes to show if you believe the hype before doing something, the outcome can be quite different.........may even apply to detecting too. What do you reckon?

 

[Tassie Daz]

Hey Peterau, Is that Magpies [Collingwood] or Magpies [Port Adelaide Magpies 1870] ?

 

[peterau]

Whhaaart, Good oL Collingwood Forever,Tassie

 

[TTKooAu]

Go Collingwood.....Port Magpies too

 

[TTKooAu]

hey TTKooau, don't worry about interrupting a post with footy mate. You got belted and my crowd lost a game they should never have lost. Just goes to show if you believe the hype before doing something, the outcome can be quite different.........may even apply to detecting too. What do you reckon?

I think you're on to something there!