Jump to content
Dave.H

Ground Balance On Iron Infested Sites Can Make A Difference

Recommended Posts

Some folks here may find this interesting, I certainly did!

Testing my equinox 800 in my home test garden today, ground not high on mineralisation, but full of iron, old rusty nails etc.

Had a silver UK sixpence 1930's buried only about 4/5 inches deep iron nails below and all around. (Difficult target)

Imagine a clock face, I'm sweeping from 12 o'clock to 6 o'clock , good 2 way tone, no problem, now sweeping from 3 o'clock to 9 o'clock, 1 way signal, one tone only sweeping from left to right (from 3 o'clock back to 9 o'clock)

Here's the interesting discovery reference ground balance, on my test garden there's so much iron getting a true GB is impossible, when I do try to auto GB it jumps up to the high 90's! However most of my permissions here in the UK read a GB in the mid 40's to the mid 50's so generally that's where I leave my GB most of the time.

Ok GB set at 50, one way target from 3 o'clock to 9 o'clock, sweeping from 3 back to 9 gives me a one way tone.

Increasing the GB to 90 gave the opposite, still a one way tone, but in reverse ,now sweeping from 9 back to 3,, still a good 2 way tone sweeping from 12 to 6!

Lowering the GB to 75, amazing, perfect 2 way tone, 3 to 9,, and 9 to 3.

Just thought I would share this as I found the results very interesting!

(GB set at 0 gave no tone whatsoever from 3 o'clock to 9 o'clock)

Program used field 2 , 50 tones, multi, discrimination -9/+1, iron bias 1, stock 11" coil, sensitivity (tried 17/21 not a great deal of difference)

Regards Dave. H

 

 

 

 

  • Like 6

Share this post


Link to post
Share on other sites

Makes me think we be rotating settings. If I hunted a location on park 1 last time use park 2 this time, field 1 next time, with and without GB, recovery rate changes etc. Anything that might bring a response from something missed before.

Share this post


Link to post
Share on other sites

I'm going to give that a try David. was on a very iron infested site thursday

  • Like 1

Share this post


Link to post
Share on other sites

That is puzzling. I wonder how it would respond in auto tracking. 

Share this post


Link to post
Share on other sites
54 minutes ago, Smithobx said:

That is puzzling. I wonder how it would respond in auto tracking. 

Might be worthwhile to try auto track but to disengage and re-engage every so often so the good targets don’t start to get balanced out. I used to do this with my x-terra 705 and it was effective. The auto tracking eliminates the trouble of finding a clean spot on which to do an auto ground balance 

Share this post


Link to post
Share on other sites
On 7/6/2019 at 7:36 AM, Nig the Dig said:

I'm going to give that a try David. was on a very iron infested site thursday

I hope it works out for you,

I was out today on a grass field, regularly ploughed and left the GB on 75, didn't engaged tracking and Equinox ran really smoothly, never ran this high before on the GB but was very impressive, plenty of finds with great tones, also recovered plenty of small targets, i.e. Air gun pellets and shotgun percussion caps, so convinced its not tracking out the small stuff!... only used recovery speed 6/7 ,,, not that interested in depth, target separation is more important to me! Good luck!

 

 

 

 

  • Like 2

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By phrunt
      My new T2 arrived this week so I decided I'd take it out for a test run today, I haven't bothered detecting football fields before, it never really crossed my mind to do so especially small town football fields that barely ever get used.  I think the last time I even saw people on this thing was about a year ago and they were riding a horse 🙂
      I guess back in time it was probably a popular place and my results today show this.  This is going to be more of a picture story as the pictures tell 1000 words! 
      I started using the T2 with Mars Tiger coil and within two minutes of arriving I had my first coin, then another, then another..... it was nuts, coins everywhere and very little junk, I was finding nice old coins, possibly one of my oldest in a while too

      Silver 🙂

      1938 British Penny

      The T2 was getting good depth, easily hitting on coins with good ID's, another silver!


      1948 Penny -  Now NZ currency, not British like the older Pennies, we used some British currency until 1967. 
      Prior to 1933 United Kingdom currency was the official legal tender of New Zealand, although Australian coins and notes were also generally accepted.
      The first New Zealand penny was minted in 1940. The penny ran until 1965, when New Zealand stopped minting pre-decimal coins in preparation for decimilisation in 1967.


      I have no idea what this thing is

      This is the football field I was detecting, under the goal posts and along the end of the field had a good collection of coins,  I guess from all the diving with the ball and coins in the players pockets, I don't know much about football, probably the only NZ male who has no clue about the game 🙂

      My oldest find of the day, a British 1912 One Penny

      It was quite deep down but the T2 banged on it real hard with a solid ID.  At this point I decided I'd go home and gear up better as this place obviously has a lot of good old coins.  I was only using my T2 with Carrot and Lesche digging tool which was hard work with all the coins being so deep.    I wanted a bigger coil to cover more ground but there was no way I was going to strap on the 15" Teknetics coil to continue using the T2 as it weighs a tonne.  I opted for the Equinox with it's 15" coil  and almost straight away after turning it on, another coin

      1950 NZ One Penny.  I left the bit of dirt on the coil up the top it came out of, I love when you get the impression of the coin in the soil.

      Another silver, 1934 Shilling

      This is the hole it came from, I always recheck my holes and I'm glad I did, another target in the hole, then another... this was crazy


      3 Silvers in the hole so far, 1934 Shilling, 1934 Shilling and a 1946 Sixpence, I was sure this was it but I did another check and off to the side of the hole, ANOTHER SILVER

      Another 1934 Shilling, 4 silvers in one hole, incredible!   Someone had a bad day.

      1964 Sixpence... the coins just kept coming, all old ones.  No longer are they made of silver in 1964...

      Nice and deep though
      +++++
      My first modern coin, a $2

      But look how deep it was, it was deeper than a lot of far older coins.... weird!

      Another two in one hole, just one cent coins from back when NZ had one cent coins.

      Another coin leaving a cool impression of itself in the soil, just a one cent I think

      It sure a lot of ground to cover, I'll be at this place for weeks... plenty more coins to find I'm sure.  Time to head back to the car, with my coil to the soil.

      Another for the road 🙂 Double sided impression on the soil with this one.  I couldn't possibly put up a photo of every coin find as there were just too many, all in about 3 hours detecting.

      The good stuff

      The bad stuff... not a bad ratio, good stuff far outweighed bad stuff, unusual for me.... I'll be back there tomorrow.... and the next day.... and the next day 🙂
       
    • By PUHH
      Hello all. 
      I found this picture: 
       
      Does anyone have more info?
    • By Tnsharpshooter
      https://www.minelab.com/__files/f/339677/EQUINOX SOFTWARE UPDATE A4 EN
      How To Rollback Equinox To Previous Software Version
      Minimum System requirements:
      USB 2.0 port
      EQUINOX USB Charging Cable with Magnetic Connector
      Windows 7, 8, 10
      50 MB of hard drive space
      20 MB of RAM
      MAC OS
      Greater than 10.10 Yosemite
      50 MB of hard drive space
      30 MB of RAM
      Note:
      Only one EQUINOX can be connected to the computer during an update operation. The EQUINOX must be ON during the software update. Any custom detector settings will be preserved while performing the update. An internet connection is required to download the Minelab Update Utility to the computer, however, an internet connection is not required to update the EQUINOX and this can be done offline. The EQUINOX coil must be connected to perform the update. Important: Do not turn off or disconnect the EQUINOX during the update process.
      Download the MINELAB Update Utility here.
      Click for larger images....

    • By Againstmywill
      On the advice of others on this forum, I called Minelab today to inquire about the play I've had in the shaft on my Equinox since day one. When I called back in 2018, they wanted me to send the whole detector in to get looked at. This time they said they would send the three pieces my way, and I just need to send the originals back to them. Has that been your experience for those in the same situation? 
    • By Ridge Runner
      As said I like both the Sport and the Nox face . The great thing about them as you hunt you can really look at the face of each and know what you have notched out . What makes the Nox even better over the Sport is you can notch out one number at a time .
       Oh I know the Nox has so many fine qualities over the Sport it will never have but like the Nox it has a pretty face .
       I don’t know why but a pretty face always tugs at my heart strings and a detector is no different.
       Chuck

      White's MX Sport Display and Controls

      Minelab Equinox Display & Controls
    • By Luv863
      I replaced the end plug on my Nox and thought others might like the idea. I don't know if anyone else has done this before but I replaced the plug with a bicycle handle bar plug. This was done purely for cosmetic purposes as the plastic end plug it had did its job just fine. These are the ones I went with https://www.amazon.com/PRO-Bicycle-Handlebar-Plugs-Black/dp/B00JATNUGS/ref=sr_1_4?keywords=pro+bar+end+plugs&qid=1567359452&s=gateway&sr=8-4 . Just a simple plastic compression plug with a nice aluminum cap. They came with black coated steel screws though so I'll replace them with stainless ones when I get the chance.
      There are other brands, styles, and colors of these types of plugs but just make sure to get the right dimensions to fit inside the shaft and not interfere with the arm cuff screw. Many of the listings don't specify the dimensions of the plug. The ones I got have an OD of 23.5mm (the smallest I could find) and my shaft OD is 22.2mm so there's a tiny bit of overhang but my arm cuff is all the way to the rear so it didn't bother me. The only thing I had to do to make them fit was trim about 1/2 in. off the end of the screw to keep it from hitting the arm cuff inside the shaft and I also used some blue loctite to ensure the screw doesn't back out.




×
×
  • Create New...