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Buyer Beware!!!!!

I

Ivan

New member
Just went out detecting with a buddy who owns a Fisher F 70. He thought it might be a good idea to get the 11"D coil.............because he does detect in some higher mineral areas. Bought it on a whim. He has been using the 11" DD for 8 months and says it's turned his F 70 into a " nail/bottlecap magnet" !!! The slightly better depth and tad smoother performance was simply not worth the resulting degrade in the disc abilities. Areas he never dug nails in were almost unhuntable, went back and put on the stock concentric coil and yes a bit noisey but way less iron hassles and a mens 10 K goldring popped up in the area he just detected a hour earlier!In between his nail/bottlecap digs. He still thinks the 11" DD is a good product but feels that there should be more mention on how it loves iron! He feels the manufacturer should state that in the advertising. For example, Teknetics in their ads: state that the G2 is hotter on low coductive objects and will not hit as hard on silver and high conductors....says so right in their adds!! So it all comes down to "Buyer Beware" do your research, then buy your product.
 
The vast majority of us that use the 11 DD on our F detectors swear by its attributes. It and its little 5" brother are terrific for sniffing out good targets among heavy trash. Yes, DD coils do love bottle caps. There are, though, ways to tell many of them. As far as more mention on how it loves iron, this specific forum alone has discussed this fact countless times and ways to tell the difference. Obviously, nothing in detecting is 100%, but the pro's for the DD far outweigh the cons. HH jim tn
 
I have had 3 different First Texas machines and would not give up my DD coil on any of them.My hunting is mostly old site not many bottle caps but lots of iron.
Works great for me but every ones different .
 
I must agree about the DD coil being different. With the 8" coil on my F2 I could hit a nickel and know it was a nickel just by the numbers evertime, but put on the 11" DD and a nickel can be anywhere on the scale and man does it love bottle caps.

Theres a lot of trade offs depending on which coil one uses. I love the target separation and depth of the 11" DD coil but I also love the rock solid ID's of the 8".:fisher:
 
jim tn said:
The vast majority of us that use the 11 DD on our F detectors swear by its attributes. It and its little 5" brother are terrific for sniffing out good targets among heavy trash. Yes, DD coils do love bottle caps. There are, though, ways to tell many of them. As far as more mention on how it loves iron, this specific forum alone has discussed this fact countless times and ways to tell the difference. Obviously, nothing in detecting is 100%, but the pro's for the DD far outweigh the cons. HH jim tn
Click to expand...

I'd have to agree with jim tn the 11"dd coil is unbelievable on my F70. I seem to notice if I run it at discrim. 06, and tones set at 2 F, i can heqar a little grunt at the edge of the pass over of an iron target. How else can you sniff out the iron targets?

Thanks!
 
Interesting..every once in a while this subject comes up...I have a 10" concentric that has never been on my machine, so now I'm curious...I am completely satisifed with the 11" dd, no trouble at all with bottle caps, the thing seems super at ID'ing targets, BUT....since I'm a shallow target stabber and dont really use its depth capabilities... you guys have more experience with various coils than me, maybe the 10 would make me more of a shallow target monster than I am with the 11? I dont want to even try it unless theres some good feedback, cant argue with the ring Ivan's buddy found. So which coil would you use (10c or 11dd) if you hunted like I do and why?
Mud
 
Mud,

I only own the 11" DD so I don't know, but I will be watching this thread carefully.

Treasurebone
 
I don't have the 10" coil for my LTD, but do have 3 coils for the Omega. I use the 11" and or the 5" DD's for heavy trash hunting, be it relic or coins, and the 11" in those situations for the little extra depth it achieves over the 10." For coin hunting like you do, I use the 10" concentric almost exclusively. It does id bottle caps much better. 95% of them you will readily know. It's id is spot on down to the depths you are stabbing and it pin points great. Give your 10" a try. I have a feeling your 11" will began to attract dust. HH jim tn
 
Ivan, in all fairness, every mfg would need to post a 'iron' disclaimer on their DD coils. And that will never happen. That's why there are forums. So a person can research/ask questions about a detector/product before they purchase. I own the Omega & have all 3 coils. Very similar to the F70 in operation. My soil is fairly mineralized, yet I prefer the concentric for its iron handling capabilities. As Jim Tn states....the 5" DD is great seperation in heavy trash.....goes pretty deep too. About 1-2" less than the big 11" DD. Which is amazing in my book. Actually, I use the 11" DD very little. If your soil is low-med mineralization, stick with the concentric. I think maybe your friend might wish to sell the 11" DD and get the 5" DD. IMHO, it would be more useful and less frustrating to him. Plus the sensitivity can be run higher than the 11" DD and it is much less prone to electro-magnetic interference than 11" DD due to its smaller size.
They are many posts on FMall from Monte, myself and others on how to disc bottlecaps/iron with the DD coils. A search will turn them up, or if that doesn't work for you, send me a private message and I will either PM or email you the info.
 
Many Metal items in the ground are referred to as Iron.. Yes it is to a degree Rusted Iron,... But many different levels of Iron in some metal items ..

Most if not all detectors will pick up some form of rusted metals.. Even though you are using discrimination ..The variance in metallurgical make up can be wide..

An example ........ Yesterday while detecting in one area I picked up 6 small screws.. They were rusted..so iron was present... But That said most screws are not classified as Iron product.
Outside of turning Disc all the way up to max those screws still rang out loud and clear...

What caused the hit.. DD coil I was using..or the content of the screw ????
 
This forum and the real world experience of its contributing members is a lifesaver regarding situations such as this. I think we have mild soil here in Mich where I predominately swing, a nice sandy loam, gb signal usually in the 70's? Is that mild? I guess I have plenty of time and finds on the 11dd to try the 10c for comparison. Thanks for the kickoff discussion Ivan, and the great feedback from the rest of you!
Mud
 
I'm a little over one week into the 10" coil on my F70. Decided to try it out for coverage' sake and also to see if it would ID better in the noisy streetwork I've been chasing. No go for now, gonna have to familiarize myself with it in regular ground first, that's a must. First impression is it's weaker than the 11"DD but that's from an as yet unproven level of experience with the coil. I usually use the 5" coil in trashy sites and like others have noted, it gets some incredible depth for it's size. Very close to the 11" DD coil. When I picked up the 10" coil I also had the opportunity to try out the big white 15 inch coil. What a monster!

With a couple known targets in the ground however it did not impress me, and the air tests were less impressive, about equal to the 11" DD coil. Not nearly good enough for that weight trade-off. I did try that 12*15 SEF butterfly a couple years ago. Never gonna recommend one of those for F70. It was way too weak and went right back to the big coil store.

All that said, the 11" DD coil is absolutely a must for medium-trashy areas or good areas where targets fall into the detectors range of depths. As to your friend Ivan, he either has to get his rig checked out or get more experience. Bottle caps are very easy to define with a very few exceptions. The TID bounce will almost always give them away. Only the deeper ones should present a problem. As any deeper target digger will tell you, not digging an iffy or bouncy signal or target that gives a good pinpoint response and is deeper than 6" AND does not give much in the way of an iron response is a sure way to miss great finds.
 
I would like to add to the 11"dd coil and its rusty cap abilities... Though I haven't been able to hear an audio deference like I can hear with my Tesoro. I have caught onto a couple clues that give them away on the 75 atleast.

The rusty caps usually bang in at the mid to high 80s for me unless they are folded in half. Then they fall right in on my 80-81 which for me means clad quarter or silver ring. Also keep sweeping over the target and alot of times you can watch the ground ferrous level meter spike to max or almost max levels. The 85-87 with a spiked ferrous level and I have found it will be Ol'Rusty. Hope some of that can be helpful to a F70 users running the 11"dd.
Dont have any experience with the F70 machine myself but I have serious time in using the 11'dd ;)

Lakota
 
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