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Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Tech Talk > Metal Detectors > VLF Designs (Moderator: Eugene52) >

BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY !

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Eugene52 Topic starter

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Teknetics , Fisher , Discovery3300 and TIANXUN 19 kHz VLF Metal Detector

	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #20 on: March 25, 2009, 01:22:15 am »

Hello Everyone . Here is a good article and is posted on several internet sites . It has some good basic general information on search coils :

Great

.....

........Eugene52

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There are 1 attachment(s) in this post which you can not view or download Please register for viewing them. garrett.pdf
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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #21 on: March 30, 2009, 09:24:58 am »

Eugene- Downloaded coplanar pdf and got 446 pages of gibberish. Huh?

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #22 on: March 30, 2009, 12:12:57 pm »

Eugene- OK. Got it 2nd time around.

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Eugene52 Topic starter

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Teknetics , Fisher , Discovery3300 and TIANXUN 19 kHz VLF Metal Detector

	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #23 on: July 20, 2009, 01:41:41 pm »

Hello Everyone. It has been a few months since I added to this topic . So here are some wide scan specs , and re-posted again the most important data for coil builders to keep !!!.........Regards.........Eugene

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There are 3 attachment(s) in this post which you can not view or download Please register for viewing them. Deep search wide scan specs.jpg Tesoro Deep search DD Widescan.jpg tesoro coil specs.jpg
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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #24 on: January 13, 2010, 05:11:16 am »

Hello .... I've been building OO coil for bandido 2umax but failed for several times although I've null and resonanced the frequency (the disc. doesn't fuction) until I've give up....But now i plan to change it to DD coil (i thought it will be more easier)...As i know, Tx and Rx need to be resonanced and nulled. But what about the fuction of resistance of wire? Is it also important in DD coil or just concentrate the nulling ? The resistance is to make Tx and Rx in phase or by how many degrees ?

Many thanks and help is needed ...
Hello...can any 1 help me with this ?

As commented all along the forum,the resistor is needed to take account for INITIAL phase difference of Rx and Tx. How about i don't care about the reading of resistor , make a near perfect of resonance of coil and nulling ,but for initial phase diff, i add another circuit called "TIME DELAY" to delay 1 of the wave (either on Tx or Rx) to adjust the CIRTAIN "INITIAL" phase diff of Tx and Rx so that the discrimination pot is working???

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #25 on: February 07, 2010, 08:37:58 pm »

this is very interesting is there anymore info on whites coils and or tesoro coils out there? thanks everyone

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #26 on: February 24, 2010, 07:16:24 am »

thank you very much for everythings

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #27 on: October 04, 2010, 03:22:41 am »

Thanks alot...this will be helpful for my school project... Kiss

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #28 on: October 29, 2010, 12:37:02 pm »

Hi Eugene, Thank you for information on what is usually the hardest part of building a VLF detector

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	Re: BUILD YOUR OWN VLF SEARCH-COILS , FOR THUNTING.COM PROJECTS ONLY ! « Reply #29 on: November 15, 2010, 03:36:33 am »

Thank you all ...... It's really the hardest part ....... and you are very helpful
thank you a lot

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