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Author Topic:  Chokeing up you detector.  (Read 2946 times)

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Online beepn

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Chokeing up you detector.
« on: December 14, 2013, 20:14 »
Many moons ago i had a noisy alternator which would wer through my cb radio. I fitted a snap toghether Ferite Choke Core to the main lead before entering the radio and wella the noise was gone.

Thinking of this using my v3 inside the house with heaps of EMI bounding around and interfering with the detector .
So got a snap on core choke and fitted it to the coil lead just before the cable enters the box and immediately all the EMI had gone.

If we look around today some USB leads have them fitted just before they enter a camera.

The name comes from Blocking- Choking high frequencies while passing Low frequencies.


Minelab sd-gp are very prone to EMI in built up areas . It just makes them impossible to use on some days. The ferrite choke does not shield the electronis but stops the interferrence getting into the control box.

It will not do any damage to the circuit board. So the next thing is to to throw one on to a GPX on the beach and see how it handles the EMI. We will see how it goes .


Regards Beepn. ;D >:( :o ;)
« Last Edit: December 14, 2013, 22:43 by beepn »
  • Detector(s) owned/used: Whites v3i, Whites Dual Field e-trac, Quattro, Exterra 70, Sovereign xs, Whites Goldmaster, Whites p.i. Minelab 2100, Aquasport, Garrett a2b, Garrett Deepseeker, Garrett bfo, Bridge Wright, Bounty Hunter rb7, Bounty Hunter rb5, Whites 6000d, Whites 6db
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Offline junker

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Re: Chokeing up you detector.
« Reply #1 on: December 14, 2013, 20:53 »
I know nothing about sparky things  :o, my son gave me a JAYCAR catalog and I saw those , the idea had occurred to me also ,  only interference I get is from thunder storms if I haven't done a noise cancel on the EXTERRA ,I just use that as a warning to go home . :'(
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Offline lazyaussie

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Re: Chokeing up you detector.
« Reply #2 on: December 14, 2013, 21:51 »
I remember reading a post on a US forum by some very knowlagable PI users in regards this & I found it interesting, my sea hunter suffers from EMI on some beaches + in effects the depth on the ctx also.
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Offline ollybolly

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Re: Chokeing up you detector.
« Reply #3 on: December 17, 2013, 02:05 »
Great idea, my Plasma telly came with 2 chokes that can be opened and clicked on around a cable. I never used them.. Might chuck one on my 305 just for the heck of it.. Could it cancel out any faint signals that you may want to dig?
  • Detector(s) owned/used: Minelab Explorer SE Pro, Minelab X-Terra 305, Propointer & Garrett Edge Digger
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Offline Rwork

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Re: Chokeing up you detector.
« Reply #4 on: December 17, 2013, 07:56 »
I think they are std issue for the minelab gold detectors in Usa. I thought they would be to help output noise rather than input ? If someone is talking to Kevin in Mlb service they might remember to ask.
« Last Edit: April 18, 2014, 10:17 by Rwork »
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
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Online beepn

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Re: Chokeing up you detector.
« Reply #5 on: December 17, 2013, 17:03 »
The Minelab Ctx 3030 has a ferrite choke core fitted to the coil lead before entering the control box. 

Regards Beepn.
« Last Edit: December 17, 2013, 17:51 by beepn »
  • Detector(s) owned/used: Whites v3i, Whites Dual Field e-trac, Quattro, Exterra 70, Sovereign xs, Whites Goldmaster, Whites p.i. Minelab 2100, Aquasport, Garrett a2b, Garrett Deepseeker, Garrett bfo, Bridge Wright, Bounty Hunter rb7, Bounty Hunter rb5, Whites 6000d, Whites 6db
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Offline goldnugget01

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Re: Chokeing up you detector.
« Reply #6 on: December 17, 2013, 18:28 »
The Minelab Ctx 3030 has a ferrite choke core fitted to the coil lead before entering the control box. 

Regards Beepn.

That settles it then....I have to get me one.  I have read mixed responses online about these but at worst case scenario...it wont hurt to try.
 
  • Detector(s) owned/used: ML Explorer SE - std DD coil & ML x-terra 70. Coils: std concentric, 10x5 18.75DD, 15" 18.75DD
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Offline Munster

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Re: Chokeing up you detector.
« Reply #7 on: April 18, 2014, 07:49 »
This is an awesome idea, very clever, thanks :)
  • Detector(s) owned/used: X-Terra 705 with 10x5" HF and 15" HF DD
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Offline Count Pierre

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Re: Chokeing up you detector.
« Reply #8 on: April 18, 2014, 13:28 »
Are you getting a choke, GN, or a 3030??  :)

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If I can't handle it, I'll go & have a few beers, or a red wine....or both.... & go from there!


Offline goldnugget01

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Re: Chokeing up you detector.
« Reply #9 on: April 18, 2014, 19:42 »
CP, when I wrote that I was running the XT70 and went looking around town for the ferrite chokes but could not readily find one.  DSE no longer stocks electronic components, Jaycar didn't have any so I left it. 

The ExplorerSE is doing well for me but as usual always looking for an edge.  I have the opportunity to pick up a hardly used Sunray Stealth x-12 coil at around half retail price delivered which apparently is better than the stock coil that came with the SE (the SE pro had a better coil again, apparently the only noticeable difference between the  SE and the SE Pro).  I don't know what difference (if any) the choke would make on the Explorer.  If I come across one I'll try it just for giggles but wont be going out of my way to find one to test.

If I was in the market I'd probably still get a 3030 simply for the multiple target display and better timings but would prefer 'more reliable' waterproof qualities hence a bit of an interest in the Excalibur down the track to complement the current set up.   Either way I'll have to find some more gold I think before that happens unless I can manage to find a benefactor.
  • Detector(s) owned/used: ML Explorer SE - std DD coil & ML x-terra 70. Coils: std concentric, 10x5 18.75DD, 15" 18.75DD
  • Oldest find: 1912 threepence...make that an 1899 Penny..make that an 1861? German 4 Pfennige. A suss looking (but confirmed) 1830-1837 half crown
Every day is 'Clean Up Australia Day' when you go detecting.

 

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