pseudo mono

I have read two differant versions of how this happens. {pseudo mono}

With a gp 3500 if you run a DD coil and select mono ,does the left hand side of coil transmit and the other side receive or does one side transmit and both sides of coil receive.
Also with a 16" nuggetfinder DD XP coil when set to mono does it still give a signal along the centre line as a normal DD would or does it receive around the edge of coil like an normal mono.
Also I have read an XP DD coil will act like an anti interferiance coil when selected and in mono and be a bit better in noisy ground with good depth.

Regards Mark

Have a read of the topic DD vs Mono below - it will answer some of your questions.

Jeff

Thanks Jeff
I did read through those links and on other forums and watched videos
from both JP and JL ,I think I must have overdone it a bit with
information overload and arn't 100 % sure , its interesting that so
many people have so many differant views on how units , settings and
coils work and it does get a bit hard at times.
I have had a lot of years in the field with whites and garret VLF machines but only purchased a ML mid last year.
Anyway I think I have it sorted and are doing OK but don't seem to be
finding gold , that I think keeps me going over what and how I'm doing
things .
I will have another read up and test it out in the field
Regards Mark.

Hi Mark

Yes it is getting harder to find and we do tend to overdo the theory when we arent finding anything.

Have a look through the members and sent a private message to others in Adelaide and go out with them. Also check out the clubs and Links including Miners Den SA for you cant beat talking to old hands. If you tell them you havent found anything, most of them go out of their way to try and get you your first piece.

JJeff

Gday Mark

In answer to your question re using the pseudo mono setting, using the standard Minelab 11" gp series dd coil that comes with the 3500 when running in pseudo mono setting the coil will transmit from the "left hand" side of the coil and recieve on "both sides" of the coil.

This is why the term "pseudo" mono is used as it is not operating as a true mono coil, because it is transmitting from only one side of the coil, rather than from the whole coil, which will in effect limit its depth and also the area of ground the signal penetrates, so also limits ground coverage as well, this is a bit of a loss in open ground but it works well on ground covered in rubble or where you have to go in between rocks.

One advantage you will find with using it in this way is that you are still able to use the descrimination feature, and I would have to say that the standard 11" dd gp series coil, used in speudo mono was excellent on my 3500.

Something you will have to watch with using the pseudo mono feature is that if you are detecting around trees and shrubs you need to remember that the coil is the most sensitive on the "left side" , so you have to remember to have the "left" side closest to the tree or shrub, or you can miss targets that are in close to or underneath things.

As far as I can remember when I used a Nuggetfinder 16" Xp coil, it also worked very well on the 3500 on noisy ground, with good depth too, and I think that it worked like any other mono coil when set on mono, I think that when the Nuggetfinder xp coil was set on normal on the coil and mono on the detector switch it was supposed to work like an anti interference coil, but I never tried this out on a salt lake or near power lines so I cant say for sure.

cheers

stayyerAU

Something you will have to watch with using the pseudo mono feature is that if you are detecting around trees and shrubs you need to remember that the coil is the most sensitive on the "left side" , so you have to remember to have the "left" side closest to the tree or shrub, or you can miss targets that are in close to or underneath things.

Just remember to go round trees (etc) clockwise when using DD coils in pseudo mono mode.

MS wrote:I have read two differant versions of how this happens. {pseudo mono}

With a gp 3500 if you run a DD coil and select mono ,does the left hand side of coil transmit and the other side receive or does one side transmit and both sides of coil receive.

Watch this video, it has a very clear animated explanation.
http://www.mlotv.com/view/196/mastering-the-minelab-gp3000/

I think it was JP who said that a DD coil run as a Pseudo Mono is not as good as a Mono coil in performance. For example, like a 11" DD in Pseudo Mono as compared to a 5x10" Mono coil. The 5x10" Mono coil is better.

Thanks everyone for the help.
I have taken on board the advice and put it to the test and are now doing much better and have a good understanding of how this all works.
The help I have been given on here has been great and has saved me a lot of time and frustration and now are finding some gold and my confidence out there in the field has grown which makes the hunt a lot more enjoyable without wondering what I'm doing wrong.
Regards Mark

.

Hi GPX when you run a DD coil in mono mode you are basically only using one half of the coil, so an 11' DD would become approx an 11"x 5 1/2"

I've seen some amazingly deep holes dug with the 11" mono....brilliant coil!

.

madtuna, I bought a 11 mono coil yesterday, now just to try it out!!

geof_junk wrote:

Just remember to go round trees (etc) clockwise when using DD coils in pseudo mono mode.

Should you do this with the STOCK DD then you will miss gold, other
then using the commander 10x5 DD coil as far as i know all other coils
are live on the LHS.
If using a DD coil round trees then remember to
use the tip/heal of the coil, remember its blade shape.... so anti
clockwise would be the go if using pseudo mono on coils other then the
10x5 commander.

By using the DD coil in pseudo mono over certain
ground types it has the potential to out do both coils of similar size
DD & mono, this is because it retains some of the ground canceling
characteristics of the true DD coil.

GPX...you'll love it. Narrawa actually was the one who convinced me to buy one after seeing him in action with his.
I'd have to say it is by far my favourite coil

.

1) >Will that new round NF Advantage 12" mono coil< give the round 11" mono coils a run for their money??

2) There are 2 different makes of round 11" mono coils. Minelab Commander and CoilTek. Which one did you buy and which one is best, or they are the same??

http://www.minelab.com/usa/products/consumer/accessories/coils/11-round-commander-monoloop-coil

http://www.coiltekmanufacturing.com.au/11-round-coil.html

hmm

congrats!!

Thanks GoldstalkerGPX, I heard the new CT GS 9x14" is about 6 ounces lighter than the NF Adv. 9x14", so that new round CT GS 18" should be very lightweight.

I heard from different sources that the CT GS and NF Adv. mono coils are the same in performance and one is not better than the other, BUT the CT GS is lighter weight and the NF Adv. are a bit more immune to EMI interference(thunderstorms, radio waves, etc).

If you have a "bad back" you may look to the lighterweight of the CT GS's.

Which new mono coil did you get ?