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Mojave coil depth
Posted by: rejeanmontreal
Date: June 23, 2017 02:05AM
I'm not impressed with the depth of my Mojave 7" coil. I get 4"-6" max with the i on iron. I live in Montreal, Quebec.
Will i get better depth with the Brown Donut 8" coil or with the new 11x8 widescan coil ?
Heck, my White's TRX pinpointer get better depth than my Mojave 7" coil ............ Go figure.....
Thanx !!!!
Rejean, Montreal

Re: Mojave coil depth
Posted by: Coin Rescue Inc
Date: June 23, 2017 09:27AM
Hmmm....I know I recovered old ring pull tabs as deep as the length of my Garret pin pointer.

Two questions for you.
Posted by: Monte
Date: June 23, 2017 10:22AM
Okay, maybe three.

1.. Was that an 'air test' depth measurement, or was that a measured depth of a coin located in the ground (and NOT a freshly planted coin) ?

2.. What was the sensitivity level you used?

3.. Out of curiosity, are you familiar with Tesoro detectors, or is the Mojave your first one?


To give a quick answer or comment: What coin were you using, and keep in mind that a lot of that Canadian coinage is made of what we refer to as 'junk metak' such as Nickel, Iron, Steel, etc.

On a freshly busied test target it might not provide typical detection depth performance.

I have a Mojave in my personal arsenal and I used the standard 7", a 6" and the donut 8" Concentric coil on it and opted to leave it as-is with the new 7" coil. It works fine, and I get sufficient functional depth.

Let's remember that ground mineral environments can change. Sometimes their might be nearby iron trashy that causes some masking and performance loss. And as good as this low-cost by useful detectors is concerned, it is a lower-priced, entry-level unit. It can work well for a lot of people and for a lot of applications, but for me it is only 1 of 5 Tesoro models in my arsenal. My Vaquero w/6" Concentric gets the best depth, if that is a comparison, followed by my Bandido II microMAX, very similar performance from my Silver Sabre microMAX, then the Mojave and it is a touch better than my original Bandido also w/6" coil.

If I am serious about wanting ... and needing ... increased detection depth, then I just grab one of my other detectors which, by design, provide me the increased depth of detection I might need. Those would be my Nokta FORS CoRe, FORS Relic or the new Impact.

To clarify 'depth' I should add that I have been metal detecting now for over 52 years, avidly, and Tesoro's are in my arsenal because these are all favorites that have proven their worth. Since '83 I have probably found more coins with a Tesoro model than all other brands combined. I have also found about twice the number of gold jewelry items with Tesoro's that will all other detector makes and models combined. Most coins and desirable jewelry are not located very deep on most places unless they has been some sort of outside action or disturbance to cause them to be located deeper for some reason. Surface to about 4" is where the bulk of the coinage comes from, and anything from over 4" to 6"/7" is what I consider to be a 'deep' coin target.

Can they be deeper and have I found coins deeper? Most certainly, Yes, but it is due to surface build-up from grass clippings and fallen, decayed leaves. Sometimes erosion, but that can also expose old coinage, too. At times old grassy areas have had sand or dirt added to build up or level a site, and that puts coins deeper. In some locations, if the ground gets well saturated with water and is heavily traveled on by vehicles, foot traffic, cattle, etc., that can cause displacement and coins, etc., can be repositioned to a deeper depth. Many other variables can effect 'depth,' but in most natural and undisturbed sites that I search, even older coins to the early-to-mid 1800's are found anywhere from surface to about 4".

By the way, I usually work all my detectors at, or as close to, maximum Sensitivity as I can, and I only reduce them if necessary to eliminate 'noise', if present, from EMI and other causes when the coil is at the operating height of about 1"-2" above the ground.

Monte



"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells
Trading Post

Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.

My Regular-Use Detectors:
Nokta: Two each of the following: Impact, FORS Relic and FORS CoRe
Tesoro: Vaquero, Silver Sabre µMAX and Mojave
White's: MX7

Other Specialty-Use Detectors from:
Compass, Makro, Nokta, Tesoro and White's
Note: Detectors are listed alphabetically by Brand, NOT in my order of preference for use. Additional search coils on-hand in accessory bags.

Pinpointers: Using Nokta and Makro Pointers.
Headphones: Using White's Pro Star Headphones w/'tank style' ear cups.
Recovery Tools: Using White's Ground Hawg shovel and Digmaster digging tool

*** All working well today to make memories for tomorrow. ***

monte@stinkwaterwells.com .. or .. monte@ahrps.org
(503) 481-8147


Re: Two questions for you.
Posted by: rejeanmontreal
Date: June 23, 2017 02:04PM
Monte, you're the man. Thank you so much for your very interresting reply. Very appreciated... I always enjoy reading your posts, as you're very knowledgeable in this hobby (used to be a Tesoro dealer..)
My depth report was with Canadian clad in parks. Sensitivity at 4. Disc at i in Iron. Low setting.
I think i'm going to buy the 8" Brown Donut.
I had a Compadre before, but i sold it when i bought the Mojave.
Rejean, Montreal

Re: Mojave coil depth
Posted by: Electricfrontporch
Date: June 23, 2017 05:04PM
With the sensitivity at 4 the Mojave is similar in depth to my 5.75 compadre.
Maybe a little deeper but not much in my testing and use.
Definitely gains an inch or two as the sensitivity goes up from the "preset".

Also found that turning the sensitivity down to 2-3 doesn't lose any major depth,but makes
it easier to get the double/triple beep on targets next to playground/swing set poles, and fences.

Is the CA clad similar to a US nickel?
Dug some Bahamian coins and they all disc out at nickel.
I'm in Florida and the only Canadian I've found is a nickel.

Hope you end up liking the Mojave but in the end it comes down to swinging
a machine that you feel comfortable with.

There's the problem(s) ....
Posted by: Monte
Date: June 23, 2017 07:49PM
Quote
rejeanmontreal
My depth report was with Canadian clad in parks. Sensitivity at 4. Disc at i in Iron. Low setting.
I think there might have been one, possibly two, brief occasions back about '84 or so when I ran the Sensitivity of a Tesoro that low. For readers w/o a Mojave in front of them, the '4' setting is where the Sensitivity control is at the 12 o'clock position. I always work my Tesoro's, and most detectors, as close to full Sensitivity/Gain as possible, reducing it only when needed. When I did run my Sensitivity at about that mid-control setting way back when I was learning some 0of the newer Tesoro models of the day and working very close to a lot of exposed rebar along the edge of a sidewalk renovation.

If you want an 8" brown donut coil, I have an extra that I took off a Bandido II µMAX that I will sell you, or I'd even take your Mojave's black 7" coil in trade for an 8" donut coil with some $$$ to boot!

The Mojave isn't a depth monster, regardless of the coil used, but it is a very decent general purpose performer for a lot of the quick and simple tasks I have for it I've been looking for someone to part with that new 7" coil as I would like one for my 'original' Bandido.

I just grabbed my Mojave off the wall and toyed around with it and am still impressed with what it shows in the way of performance for the cost. I checked my out here in my den using a USA modern Zinc cent and increasing the Sensitivity level from '4' to '5' or into the maximum Gain colored area provided me an extra 1" to almost 2" increase in 'air test' depth.

The Mojave is what it is, and does what it does, and it does that well. Easily a good working unit for my specialty needs. In this test case, I think one 'problem' is having the Sensitivity set too low, and a second issue might be the size and alloy content of the Canadian coin used. :shrug:

Monte



"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells
Trading Post

Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.

My Regular-Use Detectors:
Nokta: Two each of the following: Impact, FORS Relic and FORS CoRe
Tesoro: Vaquero, Silver Sabre µMAX and Mojave
White's: MX7

Other Specialty-Use Detectors from:
Compass, Makro, Nokta, Tesoro and White's
Note: Detectors are listed alphabetically by Brand, NOT in my order of preference for use. Additional search coils on-hand in accessory bags.

Pinpointers: Using Nokta and Makro Pointers.
Headphones: Using White's Pro Star Headphones w/'tank style' ear cups.
Recovery Tools: Using White's Ground Hawg shovel and Digmaster digging tool

*** All working well today to make memories for tomorrow. ***

monte@stinkwaterwells.com .. or .. monte@ahrps.org
(503) 481-8147


Is the CA clad similar to a US nickel? ... NO, see the list below.
Posted by: Monte
Date: June 23, 2017 07:56PM
Read here to see what Canadian coins are made of:

http://www.bcscta.ca/resources/hebden/chem/Coin%20Compositions.pdf



"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells
Trading Post

Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.

My Regular-Use Detectors:
Nokta: Two each of the following: Impact, FORS Relic and FORS CoRe
Tesoro: Vaquero, Silver Sabre µMAX and Mojave
White's: MX7

Other Specialty-Use Detectors from:
Compass, Makro, Nokta, Tesoro and White's
Note: Detectors are listed alphabetically by Brand, NOT in my order of preference for use. Additional search coils on-hand in accessory bags.

Pinpointers: Using Nokta and Makro Pointers.
Headphones: Using White's Pro Star Headphones w/'tank style' ear cups.
Recovery Tools: Using White's Ground Hawg shovel and Digmaster digging tool

*** All working well today to make memories for tomorrow. ***

monte@stinkwaterwells.com .. or .. monte@ahrps.org
(503) 481-8147


avatar
Re: Mojave coil depth
Posted by: amberjack
Date: June 24, 2017 08:16AM
hope we don't get a tight butt like Canada , sorry for you Canadians must be a real pain having steal coins :ranting: but even so they would have a consistent signature ? but then rust ? oh dear I am depressed already..

Good luck :biggrin: might need it..

AJ

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Re: Mojave coil depth
Posted by: Whimpster
Date: June 24, 2017 09:11AM
AJ,

As long as they keep pounding out the loonies and toonies I really don't care...guess the five dollar bill is next for coinage...yeehaa:)
The secret weapon here in Canada is the Tesoro...best dam detector for Canadian steel coins......
Oh-oh...maybe I let the cat outta the bag:)

Whimp

HH.



Quote
amberjack
hope we don't get a tight butt like Canada , sorry for you Canadians must be a real pain having steal coins :ranting: but even so they would have a consistent signature ? but then rust ? oh dear I am depressed already..

Good luck :biggrin: might need it..

AJ



Nova Scotia, Canada

avatar
Re: Mojave coil depth
Posted by: amberjack
Date: June 24, 2017 10:17AM
say scanning one on a fisher what numbers do they give off on a Gold bug pro for example? just interesting to know :biggrin: thanks !!

AJ

avatar
Re: Mojave coil depth
Posted by: REVIER
Date: June 24, 2017 12:45PM
I have found several steel coins from a couple of countries and they all came in as...iron.



"What if doing the Hokey Pokey really IS what it's all about?”
F70, F2, Compadre, Mojave, Judge2 - 2017....Clad, 15 silver targets including a freaking Barber quarter, a beautiful walker and 4 V nickels...
Plus other cool stuff.

Re: There's the problem(s) ....
Posted by: rejeanmontreal
Date: June 24, 2017 02:24PM
Monte, Thanks for the link about Canadian coins made of... That's cool !!
After reading your posts about the Mojave, i think that i'll stick with the 7" coil & raise my sensitivity up..... My Mojave is tune to that coil, so it will work best with the 7" coil.
Thank you also for offering me to sell your 8" brown donut, nice of you...
Yes, i heard about the $5 coin release this year, will be nice to find those $5 coin...
HH
Rejean, Montreal

Re: Mojave coil depth
Posted by: Electricfrontporch
Date: June 24, 2017 06:16PM
That's a neat link about the Canadian coinage Monte. Thanks for posting.
They have switched them a lot.

I keep hoping they will start using the dollar coins down here.
Would help the clad totals add up !

On a side note I got a Susan B Anthony dollar in place of a quarter at the store the other day.
Gave the guy a dollar bill for a 74 cent candy bar and he accidentally gave me a $1.01 in change.
Bonus find......no detector needed

Noah

I don't often disagree with one of my detecting gurus, but...
Posted by: marcomo
Date: July 03, 2017 01:06AM
Quote
Monte
Most coins and desirable jewelry are not located very deep on most places unless they has been some sort of outside action or disturbance to cause them to be located deeper for some reason...in most natural and undisturbed sites that I search, even older coins to the early-to-mid 1800's are found anywhere from surface to about 4".


I would contend that the biggest reason most older coins are not found at deeper depths would be the inherent limitations of the VLF detector.

How can you possibly know how many deeper coins and other desirable targets are left undiscovered, beyond the capabilities of your detector?

avatar
Marcomo..................
Posted by: Elton
Date: July 03, 2017 07:33AM
I agree. If your detector can't detect them..You would never know. You can suspect, and guess their down there only..Till you use a detector or a way to see deeper you can, do, and will go over some undetected targets.
You can also miss some you just don't go over,or detect due to a number of reasons within the range of your detector.



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