northwest Problem with Ground Balancing "
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QED is here! ML have NOT stopped the QED!
Goldsearch Australia has been appointed the Australian Distributor for the QED. QED info on the Goldsearch website has been updated.
This is the only forum where you can talk directly with the designer/ manufacturer of the QED!
Jrbeatty and Reg Wilson  and  Yellowfin have NO vested  or pecuniary interests(or secret deals or cash for comment or any other undisclosed benefits )in the QED other than using it to find gold which it is doing very successfully!
Over the overwhelming majority of typical Gf ground the QED GB works just fine! Another new user has used his QED over "fairly difficult ground around Waanyarra and Kooyoora areas  " and not reported any GB problems!
The so called QED GB problem is just  more fake news created by  some fake, delusional and dishonest imbecile cretins on 1/2 wits (who is a proven forum hacker and liar and  just dumb!) pox, liars and abomination and disgraceful atrocity sewer rats "forum" that have never used a QED! The QED has been used successfully to detect under 300k steel tower transmission lines(try that with a gp/gpx  with a mono coil!!!) so it  can handle bad  EMI! The QED will also run quite and stable in a household with electrical appliances running.Try that with a ML with a mono coil!!! "QED matches and and in most cases outperforms the SDC"  and will thrash it for depth on bigger gold. QED sales are still strong so if you are on the waiting list please be patient as BW is working 12 hours a day to try and reduce the waiting time.
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australian electronic gold prospecting forum.com  |  Common interest forum.  |  General chat and discussion forum  |  Prospecting tips and detector techniques  |  Topic: Problem with Ground Balancing " 0 Members and 1 Guest are viewing this topic. « previous next »
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Bobby
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« on: Friday September 24 2010 16:13:09 AEST PM »

Just got back from Tibooburra way , had to drop  some gear to a bloke so allowed an extra day to do some detecting with my old Whites GM 11 as I thought this would be good on the small stuff seeing that they say the ground is so  quiet in that area.

Problem was I just could'nt get rid of a positive signal on the pump down when trying to ground balance    confused I did try different areas .
Tried to still use it but was  hopeless', as it kept giving signals on every swing.
Thought it was a detector fault until I tried it again 300Ks away where it balanced out fine .

Any ideas on why it played up on that so called quiet ground please ?

Bobby.
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Doug
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« Reply #1 on: Friday September 24 2010 16:28:08 AEST PM »

  
Just got back from Tibooburra way , had to drop  some gear to a bloke so allowed an extra day to do some detecting with my old Whites GM 11 as I thought this would be good on the small stuff seeing that they say the ground is so  quiet in that area.

Problem was I just could'nt get rid of a positive signal on the pump down when trying to ground balance    confused I did try different areas .
Tried to still use it but was  hopeless', as it kept giving signals on every swing.
Thought it was a detector fault until I tried it again 300Ks away where it balanced out fine .

Any ideas on why it played up on that so called quiet ground please ?

Bobby.


several possible reasons:
1 the ground was above average conductivity eg might be salt affected or have a layer containing  conductive minerals
2 the ground may contain high concentrations of magnetite or maghemite which can play havoc with VLF detectors
3 the ground may contain significant  amounts of very small, non magnetic iron oxides which are superparamagnetic which again can cause huge problems for both VLF and  Pi detectors.
4 The detector is not canceling the effects of the coil moving through a static magnetic field (geomagnetic field).
Without testing the ground its hard to know which of these possibilities is the main culprit.
Was the ground  that caused the problem wet?
Is it possible that their is a fault in the detector or coil or the GB circuitry? What sort of ground (300Kaway) did it Gb on ok?
doug happy face
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« Reply #2 on: Friday September 24 2010 16:37:22 AEST PM »

 Can you tell us how you set up the detector because this might gives us a few more clues as to what the problem might be, although i have never used the detector and  I am not familiar with it.
doug happy face
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Bobby
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« Reply #3 on: Friday September 24 2010 19:36:56 AEST PM »

Thanks for the tips on what it could be Doug .

The ground was damp as it rained heavy recently , I tried outher areas many K'ms appart with the same results , was like trying the do a " GB " over a lead sinker !

The ground 300 K's away was dry hard desert red dirt , no worries on that .

Setup I tried was gain at lowest level , switch on SAT & not on , pumping small 6x4" DD up & down about 14" off ground whilst turning the balance  knobs slow .

I think the circuitry OK as I've now air tested it on a half gram nugget with full gain for a clear signal   happy face 
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« Reply #4 on: Friday September 24 2010 20:40:56 AEST PM »

  
Thanks for the tips on what it could be Doug .

The ground was damp as it rained heavy recently , I tried outher areas many K'ms appart with the same results , was like trying the do a " GB " over a lead sinker !

The ground 300 K's away was dry hard desert red dirt , no worries on that .

Setup I tried was gain at lowest level , switch on SAT & not on , pumping small 6x4" DD up & down about 14" off ground whilst turning the balance  knobs slow .

I think the circuitry OK as I've now air tested it on a half gram nugget with full gain for a clear signal   happy face 


What model GMT were you using (GMT2?) Does it have  auto ground tracking and or manual GB?
What level was the SAT set at?  How fast did you pump the coil up and down when Gb'ing? Was the "signal "you got when trying to GB like a target or a moan or like an overload signal?? Did you still get the false signals if you scanned more slowly? How stable was the threshold when the coil was  stationary?
A lot of questions i know but just trying to pull all the jigsaw pieces together! Maybe Reg Sniff will see this post and may suggest the reason or reasons for the Gb'ing problems you had.
doug happy face

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« Reply #5 on: Friday September 24 2010 21:10:10 AEST PM »

 I have just downloaded the GM2 instruction manual and see that it only has manual GB (coarse and fine),a sensitivity control, tuner , iron discrimination and a 3 position mode control with no ability to vary SAT except in SAT on or for salty ground or PP (pin pointing)Did you try try to run  the GM2  in the X ground salt mode which the manual says has a faster SAT?
doug happy face
Here is the GM2 manual

* GM 2 Instruction Manual.pdf (1954.83 KB - downloaded 9 times.)
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Bobby
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« Reply #6 on: Friday September 24 2010 21:52:50 AEST PM »

Hi Doug ,
Thanks for the trouble your going to   respect
Sounded like a moan every time pumped towards the ground , then when scanning over the ground slow kept signaling like there were nuggets scattered everywhere   ::53::
Threshold was stable if coil lifted off ground in a stationary position .


Yep tried to get it GB-ed on the salt SAT also , was not as bad but still signaling B/S targets . 
The salt SAT position is very poor at penetration even when you can GB it .

This detector used to find nuggets once   CRY
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« Reply #7 on: Friday September 24 2010 22:16:40 AEST PM »

  
Hi Doug ,
Thanks for the trouble your going to   respect
Sounded like a moan every time pumped towards the ground , then when scanning over the ground slow kept signaling like there were nuggets scattered everywhere   ::53::
Threshold was stable if coil lifted off ground in a stationary position .


Yep tried to get it GB-ed on the salt SAT also , was not as bad but still signaling B/S targets . 
The salt SAT position is very poor at penetration even when you can GB it .

This detector used to find nuggets once   CRY

Its possible that on the particular ground you were detecting that the /GB range was just not sufficient, although this seems less likely when you were using the lowest  gain and a DD coil. When you pumped the coil up and down and you changed the coarse GB what was the change in the threshold tone? eg did it null when the coil came close to the ground  and then recover to threshold or conversely did the threshold tone get louder when the coil came close to the ground and then recover to threshold?Ie did changing the coarse GB  produce a change in threshold response either from + to- or from- to+ at any point in the GB adjustment?
doug happy face
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Bobby
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« Reply #8 on: Friday September 24 2010 22:50:15 AEST PM »

Think your right about the GB range being insufficient !
just had a read of the manual & it said this detector is designed to operate in iron mineralised ground , if the ground had bugger all mineral content then the moan when pumping down can't be cancelled out by turning the knobs to the left .
So it seems the ground was just to quiet for how I normally tune it , should have had a copy of the manuel as it explained another way to operate in those conditions .

Sorry I can't remember the changes to the threshold sounds when trying to GB it,   I was really getting pissed off with the frustration of not being able to do any hunting as here I was out the back of whoop whoop in great looking ground with a limp dick brain  DUNCE 

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« Reply #9 on: Friday September 24 2010 23:03:16 AEST PM »

 This is what the manual says to do in low mineral conditions( it probably almost turns the Gb off)
doug  happy face


* low mineral.jpg (154.9 KB, 644x449 - viewed 122 times.)
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Bobby
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« Reply #10 on: Friday September 24 2010 23:12:08 AEST PM »

Good on ya'  Doug , thanks again for sorting  it out .

 happy face happy face

Cheers
Bobby.
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