Menu
What's new
Find's Treasure Forums

Welcome to Find's Treasure Forums, Guests!

You are viewing this forums as a guest which limits you to read only status.

Only registered members may post stories, questions, classifieds, reply to other posts, contact other members using built in messaging and use many other features found on these forums.

Why not register and join us today? It's free! (We don't share your email addresses with anyone.) We keep email addresses of our users to protect them and others from bad people posting things they shouldn't.

Click here to register!

Need Support Help?

Cannot log in?, click here to have new password emailed to you

10.5 DD COIL 7.5?

M

MEV

New member
I HAVE ONE QUESTION IS 10.5 DD COIL 7.5, BETTER THAN 18.75 COIL FOR COINS AND RELICS , I MAKE THESE QUESTION BECAUSE I OWN A 18.75 COIL ON MY X TERRA 705 AND I WOULD LIKE TO FIND MORE COINS AND STUFF , IF I PUT MY SENSITIVITY TO LOW WELL DEPTH WILL BE TO LOW APPROX 3 TO 4 INCHES BUT IF I PUT SENSITIVITY TO HIGH WELL I WILL GET MORE DEPTH BUT THE TID NUMBERS WILL NOT DISTINGUISH WHAT EVER IT IS UNDER MY COIL , NUMBERS WILL JUMP ALL OVER -4-8-6.36 38 40 16 22 ETC AND ALSO,WHEN MY SENSITIVITY IS 25 WHY DOES IT SOMETIMES READS 40-44 TID NUMBERS AND AT LAST RESULTS TO BE A PEACE OF IRON :veryangry: AND ALSO ABOUT 4 OR 5 TIMES THESE HAPPEND TO ME YESTERDAY I HAD A 32 34 TID NUMBERS MADE THE HOLE AND SUDDENLY THERE WAS NOTHING , I CHECKED MY GROUND BALANCED AND IT WAS OKAY AND I MADE A AUTO NOISE CANCEL . I LOVE THESE DETECTOR BUT SOMETIMES I HATE IT

SO IF YOU COULD GIVE ME A BETTER RECOMMENDATION THAT COULD HELP ME OR MAYBE I NEED 10.5 DD COIL 7.5 KHZ

I HAVE READ DIGGERS BOOK AND FOLLOWED ALL HIS INSTRUCTIONS AND NOTHING IS WORKING . MAYBE I THINK THE PROBLEM IS THE COIL , ITS A 18.75 KHZ THAT WILL DETECT THE SMALLEST STUFF AND THATS WHY TID NUMBERS JUMP ALL OVER , AND I WANT TO FIND DEEPER THINGS SO I PUT THE SENSITIVITY HIGH ALMOST ALL THE TIME 27,28 SO I CAN GET MORE DEPTH AND ON DIGGERS BOOK HE EXPLAINS IT VERY WELL THAT IF YOU PUT SENSITIVITY TO HIGH THE DETECTOR WILL NOT DISTINGUISH VERY WELL THE TARGET

SO YOU THINK I SHOULD BUY A LOWER FRUECENCY COIL ????
 
your right in high trash with sens so high and 18.75kHz coil its going to drive you nuts, higher sens does not equate to more depth in fact it can do the opposite and give less depth, what we are looking for is having the machine as stable as we can get it, this will give better depth IMHO.

the 7.5 DD coil will be more stable if your soil is good and IMHO is better on coins.

am sure more experienced uses will add to help you out.

blank planet
 
hey thanks plank planet for your response but , when you say
what we are looking for is having the machine as stable as we can get it said:
you are saying that when I'm on sensitive mode and I'm setting the numbers high and the detector starts making weird sounds then i back up 1 or 2 numbers ?

If you are saying that; well i always do that until it is stable.

So:confused:
Click to expand...
 
I will try and help if I can. With any TID detector, the deeper the target the less accurate the TID will be so on your deep targets the TID will drop some numbers. If you use the Target ID Stability function, your TID will lock on with less jumping but according to the book your audio may not match up to the TID.
With just about any detector you use, deep rusty iron will wrap around from low -10 to to +48 or more, so one of the tricks with the Xterra that I have found is if you are getting a 40 to 48 and while pinpointing you are getting a negative number it is usually iron. Also, I have yet to dig a good target if my TID is going negative in any part of my sweeping the target. Another thing is that every good target that I find always gives a good audio response. What I mean by this is that there is no distortion at all in the sound, It may fluctuate between tones , but it has no distortion. I'm not saying that I don't dig rusty iron and trash, I dig my fair share without a doubt, but alot of the trash I find, I dig just to see what it is.

As for loosing targets after you dig them, possibly they were small foil pieces that after you disturbed the ground you broke the halo so then they may be to small for the detector to detect or possibly it was a small piece of coal. I have had both types of targets disappear on me, I can usually relocate them with my pin pointer, though not always.

I had the 10.5" 18.75 DD coil, and now have the 10.5" DD 7.5 coil and the only real difference that I noticed is that the 18.75 hits harder on small items. I understand that the 18.75 DD is real good for Relic hunting.
 
I just purchased a 18.75 kHz for just finding small thin stuff like hammered coins and relics that we do have here in Europe.Some of them are so tiny..
I couldn
 
well listen. i started with the 9 inches concentric coil on 7.5 khz and i had the same things happening like you. i did changed the coil to 10.5 inches dd coil 7.5 khz and the result was. CAUSE its bigger i am having more depth and this is confirmed from air testing and ground testing and it is really more stable. More stable means that it can be ground balanced better and you are not having strange sounds. i hope this help you.
 
Guys who own both 10.5" DD coils, say there isn't that much difference between the two, so don't know if getting the lower freq. coil would help much or not. I have the little 6" DD HF coil and really like it for trashy areas and just yesterday used the 10.5" DD MF coil with the sensitivity maxed out (30) and with both tracking and target stability on in a very large, low trash area with truly outstanding results ( 6 silver and a s.& g. ring ). Though it is important to always try and match both your sensitivity AND swing speed to the amount of trash that an area contains. Yesterday's area didn't contain much trash, so I was running maxed out all the way around with great results. Having adjacent trash next to a good target can cause you to have a variety of numbers. Also today's detectors are so sensitive that unless you have a good quality pin pointer, it is extremely easy to over-look the very tiny pieces of various kinds of metal that your detector will hit on (often down to an 1/4th of an inch or smaller). It is best to first learn your tones, then pay attention to your TID readings. It takes time, but eventually you can train your ears to lock in on the kinds of sounds (tones) you are seeking. Being a coin shooter, anymore when my coil passes over any kind of coin especially a dime or larger, it's almost like an alarm going off in my head (earphones), but it has taken me 3 long years to gain that ability. Try and use the TID to verify what your ears are telling you, not the other way around. I do use the TID to try and I.D. nickels and any possible gold targets.
 
All three frequencies will detect metal. Some are just better at identifying the metallic properties of each target. HF coils are better suited to ID low conductive and smaller targets. LF coils are better suited to ID higher conductive and larger targets. For these reasons, I'd suggest that the MF coil will properly identify copper and silver coins more accurately than the same size HF coil. But both should detect them at comparable depths. Implementing TID stability can improve the accuracy of the visual TID. However, note that the audio tone may not match what the TID indicates, due to the visual TID having more "filtration" than the audio tone. JMHO HH Randy
 
Blank Planet said:
your right in high trash with sens so high and 18.75kHz coil its going to drive you nuts, higher sens does not equate to more depth in fact it can do the opposite and give less depth, what we are looking for is having the machine as stable as we can get it, this will give better depth IMHO.

the 7.5 DD coil will be more stable if your soil is good and IMHO is better on coins.

am sure more experienced uses will add to help you out.

blank planet
Click to expand...

I thought you meant a 7.5 in coil. That is what the XTerra needs! A low freq 7.5 in DD coil!
 
Turn the sensitivity down a little bit, that may help. I also dig nails. It does not matter which coil i use. However I dig less nails with the 10.5" DD at 7.5khz. I also dig less targets overall and less iffy signals. I have learned to use the 5x10 DD coil well. I am trying to learn the 10.5 MF DD as well. It all depends on the area I am hunting. Less trash means bigger coils. I do not hunt alot of clean areas so I use the 6" DD or the 5x10 DD more as they have better separation and pinpointing.

I love the 5x10 coil. If I could have only one coil that would be the one.

Jeff
 
I agree with Jeff. The 5X10 HF DD coil is my favorite but I am using the 10.5 MF DD more and more in open areas. It does seem to ID coin targets a little better but I am so used to the TID numbers with the 5X10 the variation does not really bother me. I will dig an occasional rusty target with either coil. I can run the 5X10 sensitivity at around 23 in my trashy park and still get good separation and if I am in a little more open area, I can run it wide open which is what I prefer. I will be buying the 6 inch HF DD coil soon for my trashy park and I know it will be much better.
 
You must log in or register to reply here.
Top