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  • 1 Post By kamgort
  • 1 Post By Carl-NC

Thread: how to increase the sensitivity ACE-250

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  1. #1
    ru
    Dec 2009
    Perm
    Garret AT Pro
    520
    21 times

    how to increase the sensitivity ACE-250


    I found an easy way to slightly raise the sensitivity of the device without making changes. To do this, you just need to fine-tune the apparatus with R48.

    1. Install resistor. We note the position of the resistor marker and make a turn counterclockwise until it stops thin screwdriver.





    You can control the oscilloscope signal at the output resistor/



    In the factory setting is set to sine amplitude 30V .. With the help of the resistor can increase the amplitude of 3.5 volts. As a result, the sensitivity of the coin has risen by about 4 cm in the air, when other conditions remain unchanged.Discrimination works well.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Sovereignelite likes this.

  2. #2
    us
    Mar 2003
    Oregon
    V3i, MX9, TDX, GMT, Custom Designs
    1,070
    47 times
    All Types Of Treasure Hunting

    Re: how to increase the sensitivity ACE-250

    R48 sets the GB point, so in air tests you may pick up depth, but in mineralized ground you will likely lose depth.

    liftloop likes this.

  3. #3
    ru
    Dec 2009
    Perm
    Garret AT Pro
    520
    21 times

    Re: how to increase the sensitivity ACE-250

    Quote Originally Posted by Carl-NC
    R48 sets the GB point, so in air tests you may pick up depth, but in mineralized ground you will likely lose depth.

    Spring check. Remains a bit...

  4. #4
    us
    Jan 2009
    Whites Classic 5-ID / Garrett Ace 250
    182

    Re: how to increase the sensitivity ACE-250

    Maybe in Russia they don't have so much mineralized ground.

  5. #5
    us
    Search & Recovery Specialist

    Mar 2010
    Earth
    Garrett ace 250 with Sniper & DD coil with a Sun Ray Probe ,BountyHunter 101/BountyHunter pinpointer Dredge/highbanker combo, Mini Trommel, Blue Bowl and other stuff I dont use very often..lol
    693
    142 times
    All Types Of Treasure Hunting

    Re: how to increase the sensitivity ACE-250

    Good mod...might not work for everyone though

  6. #6
    fr
    Apr 2010
    6

    Re: how to increase the sensitivity ACE-250

    Hello,

    Has anyone else tried this mode ?

    Soldering a sensitive 20K variable potentiometer should give us a ground balance adjustment on ace 250 ?

    Sorry for my poor english.
    Regards
    RaphaŽl

  7. #7
    ru
    Dec 2009
    Perm
    Garret AT Pro
    520
    21 times

    Re: how to increase the sensitivity ACE-250

    Quote Originally Posted by Trass Boulba
    Hello,

    Has anyone else tried this mode ?

    Soldering a sensitive 20K variable potentiometer should give us a ground balance adjustment on ace 250 ?

    Sorry for my poor english.
    Regards
    RaphaŽl
    Adjusting the cost of feeding on the generator. This allows for greater signal transmission

  8. #8
    fr
    Apr 2010
    6

    Re: how to increase the sensitivity ACE-250

    Should you tell me more about tha modding ? Juste increasing the number of batteries ?

    Regards
    RaphaŽl

  9. #9
    ru
    Dec 2009
    Perm
    Garret AT Pro
    520
    21 times

    Re: how to increase the sensitivity ACE-250

    Quote Originally Posted by Trass Boulba
    Should you tell me more about tha modding ? Juste increasing the number of batteries ?

    Regards
    RaphaŽl
    Adjustment is done by sensitivity.
    Regards
    Poul

  10. #10
    fr
    Apr 2010
    6

    Re: how to increase the sensitivity ACE-250

    Hello Kamgort,

    If i've understood everything, i just have to turn r48 counterclock until the end.
    Then, my ace 250 will be more powerful.

    The ground is very mineralised near my house cause i leave on an old mountain. Will this tuning work for that kind of ground. Do i have just to decrease the sensivity to make my detector efficient ?

    Regards
    RaphaŽl

  11. #11
    ru
    Dec 2009
    Perm
    Garret AT Pro
    520
    21 times

    Re: how to increase the sensitivity ACE-250

    Quote Originally Posted by Trass Boulba
    Hello Kamgort,

    If i've understood everything, i just have to turn r48 counterclock until the end.
    Then, my ace 250 will be more powerful.

    The ground is very mineralised near my house cause i leave on an old mountain. Will this tuning work for that kind of ground. Do i have just to decrease the sensivity to make my detector efficient ?

    Regards
    RaphaŽl
    Hello RaphaŽl .
    All true.'ve Got to adjust the oscilloscope r48 .. The photo shows how the amplitude of the signal.
    Regards Paul

  12. #12
    fr
    Apr 2010
    6

    Re: how to increase the sensitivity ACE-250

    Hello Paul,

    So this mode increases the power of the ACE 250. In fact the R48 doesn't seem to drive the ground balance but the power of the coil. Is that right ?
    I've not done the mod for the moment cause i'm first recording how deep my detector goes with the little and the big coil before.

    Which function does the second potentiometer drives (the one located 2cm on the right and 2cm up from the R48) ? I don't find it on the circuit map.

    Yesterday i attached the wire of the coil really firmly on the stick with some rubber and i turned the sensitivity to 7. There were no more false signals when prospecting in the forest. but maybe the fact that it has rained the day before helped too. I'll tell you if it is better even when the ground is really dry.

    Regards
    RaphaŽl

  13. #13

    Nov 2012
    5
    All Types Of Treasure Hunting
    In order to increase sensitivity using a wooden ruler for measurement. Set the Ace at full sensitivity. Than wave different objects under the coil. Find out distance at which the ACE hits on the targets. Again lowering the sensitivity one notch at a time. you would find idea of your coil performing at different sensitivity settings.

  14. #14
    us
    May 2008
    lakelinden mi
    MXTdeepscan 8by14dd, bulls eye 2, 5900diprosl Maxima1500, Master Hunter cx plus Treasure Hound, surf
    3,034
    316 times
    All Types Of Treasure Hunting
    that's not enough to help that thing out
    it's going too false even more now
    I hate to discriminate but some times you have too!

 

 

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