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Offline Eugene52
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17957.00 Gold
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Teknetics , Fisher , Discovery3300 and TIANXUN 19 kHz VLF Metal Detector
« Reply #10 on: September 07, 2009, 10:12:38 am »
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Quote:Posted by GoldDigger1950
Don't do that "loop around the ferrite core" thing like computer cables do. Just use it straight through and keep it up on the shaft and away from the coil. The coil will see it as a target and worse yet, the ferrite material will absorb a portion of your transmitted pulses. Use a bread twist tie or a bit of tape to keep it from sliding around.

If you have a lot of extras, talk to Christian about putting a few in the store here and you can make yourself a bit of gold for your account while you help others here.


Hello Everyone . As GoldDigger1950 says , be carefull , this may do more harm than good . One or Two things might be happening . The problem may be from ingress "leakage" getting into the coax cable which could be cheap coax being used , a faulty connector ,the impedance is not correct or the interference is coming from the search coil itself . Yes a ferrite bead can be used , but use the correct one that eliminates the interference and not the good signals you need . There are formulas and different types to choose from . The idea is great but just be carefull . Here are just a couple links for now . This is just a suggestion , no member here on this subject is wrong so far .
HH.....Eugene

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http://www.palomar-engineers.com/RFI_Kit/rfi_kit.html



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http://www.cwsbytemark.com/index.php?main_page=page&id=114




1093-5315

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