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coiltek anti interference
Posted by: Digger70pa
Date: March 06, 2018 08:50AM
Question for you guys. Does a coiltek anti interference coil discriminate? Just wondering thanks.



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Re: coiltek anti interference
Posted by: allgirls
Date: March 06, 2018 06:34PM
I have been looking for a used Coiltek A.I. but to answer your question according to Anbenson in the 4500 discriminate thread they do not.

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Re: coiltek anti interference
Posted by: Digger70pa
Date: March 06, 2018 06:43PM
Quote
allgirls
I have been looking for a used Coiltek A.I. but to answer your question according to Anbenson in the 4500 discriminate thread they do not.
Ok thanks for answering.



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Re: coiltek anti interference
Posted by: Old California
Date: March 06, 2018 10:30PM
I had an 11" DD Coiltec interference coil, it did discriminate. Wasn't as deep as a stock GPX DD, but it did have discrimination.

Paul



AKA..Paul (Ca)

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Re: coiltek anti interference
Posted by: filternozzle
Date: March 07, 2018 03:40AM
I have a number of Coiltek Anti Interference coils and can assure you they DO discriminate. As Old California states above they are not as deep as the same size DD coil. However, the trade off is well worth it in areas of high EMI.



Happy Hunting
Minelab: GPX-5000, GPX-4500. Whites Pulse Scan TDI. Nexus: MP, Standard Mk II & Ultima. Nautilus: Silver King, DMC, DMC II, DMC-IIB & DMC IIBa.

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Re: coiltek anti interference
Posted by: Digger70pa
Date: March 07, 2018 01:08PM
Quote
Old California
I had an 11" DD Coiltec interference coil, it did discriminate. Wasn't as deep as a stock GPX DD, but it did have discrimination.

Paul
Cool. Thanks for the info. I'm looking at getting the 14" coiltec anti coil for relic hunting. I've got a few spots with electric fences & power lines over head. I wonder how they make it less sensitive to electrical interference? I read on here it's a figure 8 winding in them. I wonder if it's shielded better?



From The Great Appalachian Valley Minelab Fisher Teknetics Whites Garret detectors.

Re: coiltek anti interference
Posted by: filternozzle
Date: March 07, 2018 01:50PM
Quote
Digger70pa

I had an 11" DD Coiltec interference coil, it did discriminate. Wasn't as deep as a stock GPX DD, but it did have discrimination.

Paul Cool. Thanks for the info. I'm looking at getting the 14" coiltec anti coil for relic hunting. I've got a few spots with electric fences & power lines over head. I wonder how they make it less sensitive to electrical interference? I read on here it's a figure 8 winding in them. I wonder if it's shielded better?

The Coiltec 14" Anti Interference coil is my 'go to' coil in areas of high EMI. A really good coil to have in your arsenal.



Happy Hunting
Minelab: GPX-5000, GPX-4500. Whites Pulse Scan TDI. Nexus: MP, Standard Mk II & Ultima. Nautilus: Silver King, DMC, DMC II, DMC-IIB & DMC IIBa.

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Re: coiltek anti interference
Posted by: Digger70pa
Date: March 07, 2018 03:51PM
Quote
filternozzle


I had an 11" DD Coiltec interference coil, it did discriminate. Wasn't as deep as a stock GPX DD, but it did have discrimination.

Paul Cool. Thanks for the info. I'm looking at getting the 14" coiltec anti coil for relic hunting. I've got a few spots with electric fences & power lines over head. I wonder how they make it less sensitive to electrical interference? I read on here it's a figure 8 winding in them. I wonder if it's shielded better?

The Coiltec 14" Anti Interference coil is my 'go to' coil in areas of high EMI. A really good coil to have in your arsenal.
That's good to know buddy. I'll have one soon. I'm just getting started with my GPX buddy. It'll take me a little while to compliment it with the needed equipment. How does it do on coppers & small silver like half dimes? Thanks



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Re: coiltek anti interference
Posted by: Digger70pa
Date: March 12, 2018 09:41PM
A hunter told me to stay away from the AI coils today. He said they loose a lot of depth compared to the regular coils. I was wondering if the 14" anti coil is comparable to the 11" DD coil?



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Re: coiltek anti interference
Posted by: filternozzle
Date: March 13, 2018 03:25AM
Quote
Digger70pa
A hunter told me to stay away from the AI coils today. He said they loose a lot of depth compared to the regular coils. I was wondering if the 14" anti coil is comparable to the 11" DD coil?

You have to remember the whole point of an AI coil is to enable good performance of the GPX in areas of 'high EMI' where other coils are 'unusable' or so difficult to use that one has to switch into cancel (with loss of depth) and or, have restrictions on which Search Modes, Soil Timings or Audio Types can be used together with reduction in in other settings like RX Gain, Stabilizer and Target Volume. All resulting in severe loss of depth.

In answer to the question of depth, I have found the performance of the 14" AI to be at least as good as a standard 11"DD

In areas of very little or no EMI then a standard DD or Mono should be used.



Happy Hunting
Minelab: GPX-5000, GPX-4500. Whites Pulse Scan TDI. Nexus: MP, Standard Mk II & Ultima. Nautilus: Silver King, DMC, DMC II, DMC-IIB & DMC IIBa.

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Re: coiltek anti interference
Posted by: Digger70pa
Date: March 13, 2018 04:09PM
Quote
filternozzle

A hunter told me to stay away from the AI coils today. He said they loose a lot of depth compared to the regular coils. I was wondering if the 14" anti coil is comparable to the 11" DD coil?

You have to remember the whole point of an AI coil is to enable good performance of the GPX in areas of 'high EMI' where other coils are 'unusable' or so difficult to use that one has to switch into cancel (with loss of depth) and or, have restrictions on which Search Modes, Soil Timings or Audio Types can be used together with reduction in in other settings like RX Gain, Stabilizer and Target Volume. All resulting in severe loss of depth.

In answer to the question of depth, I have found the performance of the 14" AI to be at least as good as a standard 11"DD

In areas of very little or no EMI then a standard DD or Mono should be used.
Cool thanks buddy. I asked & got the suggestions I needed. Cool thread. I relic hunt for civil war artifacts & run into lots of emi with my vlf machines. From the little experience that I have with the GPX what your saying is helpful. As far as I know nothing is made for a vlf like that & the only way to combat emi is a reduction of gain. Thanks for the advice buddy. HH



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Re: coiltek anti interference
Posted by: Digger70pa
Date: April 08, 2018 06:27PM
Well I used my AI coil today. It did pretty good. Some things I didn't know about it was that it reverses the signal on the back swing. That takes a little getting used to. It blanks out over shallow iron & warbles on deep it on. I hunted right under power lines also. It was smooth.



From The Great Appalachian Valley Minelab Fisher Teknetics Whites Garret detectors.

Re: coiltek anti interference
Posted by: filternozzle
Date: April 09, 2018 02:34AM
Quote
Digger70pa
Well I used my AI coil today. It did pretty good. Some things I didn't know about it was that it reverses the signal on the back swing. That takes a little getting used to. It blanks out over shallow iron & warbles on deep it on. I hunted right under power lines also. It was smooth.

Good to hear the AI is working well for you. I should have mentioned it reverses the tones, however, if you go the the rear LCD menu and scroll down to 'Response' and change it from 'Normal' to 'Inverted' you get the tones the same as a normal DD coil. HH



Happy Hunting
Minelab: GPX-5000, GPX-4500. Whites Pulse Scan TDI. Nexus: MP, Standard Mk II & Ultima. Nautilus: Silver King, DMC, DMC II, DMC-IIB & DMC IIBa.

avatar
Re: coiltek anti interference
Posted by: Digger70pa
Date: April 09, 2018 06:30AM
Quote
filternozzle

Well I used my AI coil today. It did pretty good. Some things I didn't know about it was that it reverses the signal on the back swing. That takes a little getting used to. It blanks out over shallow iron & warbles on deep it on. I hunted right under power lines also. It was smooth.

Good to hear the AI is working well for you. I should have mentioned it reverses the tones, however, if you go the the rear LCD menu and scroll down to 'Response' and change it from 'Normal' to 'Inverted' you get the tones the same as a normal DD coil. HH
So if I invert the tones it will not alternate low high high low then? It'll report high low high low & low high low high when swinging over a target? Depending on target conductivity.



From The Great Appalachian Valley Minelab Fisher Teknetics Whites Garret detectors.

Re: coiltek anti interference
Posted by: filternozzle
Date: April 09, 2018 10:39AM
Quote
Digger70pa


Well I used my AI coil today. It did pretty good. Some things I didn't know about it was that it reverses the signal on the back swing. That takes a little getting used to. It blanks out over shallow iron & warbles on deep it on. I hunted right under power lines also. It was smooth.

Good to hear the AI is working well for you. I should have mentioned it reverses the tones, however, if you go the the rear LCD menu and scroll down to 'Response' and change it from 'Normal' to 'Inverted' you get the tones the same as a normal DD coil. HH

So if I invert the tones it will not alternate low high high low then? It'll report high low high low & low high low high when swinging over a target? Depending on target conductivity.

The AI coil will give exactly the opposite High/Low, Low/High sounds to a DD coil. That is a DD coil will give a High/Low tone on small shallow or low conducting targets, the AI will give on the same targets Low/High. If you use the LCD menu and change Response from Normal to Inverted the AI on the same targets will sound the same as the DD with Responce set to Normal, that is High/Low.

Note on larger deeper and high conducting targets the tones with Response set to Normal will be Low/High for a DD and High/Low for the AI.

For objects really deep or not so deep but very small, the tone is more of a mono cuckoo sound.



Happy Hunting
Minelab: GPX-5000, GPX-4500. Whites Pulse Scan TDI. Nexus: MP, Standard Mk II & Ultima. Nautilus: Silver King, DMC, DMC II, DMC-IIB & DMC IIBa.

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