Frank in NH
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New 5" DD coil, used it on my F75 today great target separation in the trash.
- Thread starter Frank in NH
- Start date
Frank in NH
Active member
n/t
Frank in NH
Active member
Disc. at 6 in monotone DE mode sen. high as you can go. With a dime and 2"rusted cut nail, nail just chirped a little and gave a signal on the dime. Also put cut nail on top of dime and got a good signal but not the high dime signal but you would dig it. This is with F75 and 5" coil. Now to try it at some old cellar holes.
I set up a little test garden at my house, and one of the items I had was a mercury dime with a smalish nail sitting on top of it. I had my F70 set to 0 disc, 3H tones, DE mode, and sens @ 60. With the stock F70 coil it would give an iron grunt while passing over the dime/nail. With the 5" DD coil I could get a fairly repeatable high coin tone.
Frank in NH
Active member
n/t
I haven't had the coil to the soil yet. This weekend I plan to hunt an old victorian era homestead site that I remember going to as a kid and finding buttons and stuff on top of the ground. The building and surface trash have been removed, but I plan to test the 5" DD coil at this site this weekend and see how it does.
I don't have the cash to swing getting one right now but I want one really bad! I had the little white football coil for the 75 but I was one that did not like it at all. In this dirt around here, I gotta have a DD coil to do any good and I should have known better trying a concentric coil anyway.
My hunting buddy just got one for his machine and hasn't even plugged it into the control box yet. He said next time we hunted together that I could just take it and try it so I am gonna get to play with one hopefully one evening this week. If I like it well enough I may have to see what I can come up with and trade him a couple of my better relics for it.
My hunting buddy just got one for his machine and hasn't even plugged it into the control box yet. He said next time we hunted together that I could just take it and try it so I am gonna get to play with one hopefully one evening this week. If I like it well enough I may have to see what I can come up with and trade him a couple of my better relics for it.
I have a test best setup with a silver dime buried at 6", 7" and 8". I tested both the 5" DD and the 4x6 concentric yesterday using my F75 setup in JE mode, 6 disc, 4 tone, 75 sens. My soil GBs at 60 with .01/.03 Fe.
Both coils easily detect the 6" dime but the 4x6 is the only one that gives a very faint high note on the 7" and 8" dimes. But these signals were very faint and I needed to be right over the target. In real hunting I would have certainly passed over the targets. The 5" DD was absolutely silent on those targets. In addition, the 5" DD is a bit noisier than the 4x6 putting out more high pitched "tics" at the identical SENS level. I wouldn't raise the sens on the 5" any more than I had it.
With a steel bottlecap buried at 4", the 4x6 yields a much more broken audio signal when swept over the center of the coil with a repeatable iron tone when swept at the tip of the coil. The 5" DD responds like the big factory DD giving a clean sound in the center then a repeatable iron tone again when swept at the tip of the coil.
I have a rusty nail buried 1" deep and 6" apart from a silver dime buried at 4". Both coils do an excellent job separating both targets at very high swing speeds with a slight edge going to the 5" DD. The audio was just a little 'cleaner' on the dime compared to the 4x6. You begin to reach the limit of how fast your brain can process both signals. IMHO, neither coil excels over the other, but both coils are far superior compared to the factory 9x11 DD.
Using my 9x11D D, I can see easily see the 7" and 8" targets, with accurate ID, if I swing using a normal to fast swing speed. If I slow down significantly, or do the Minelab 'wiggle', the 7" and 8" targets nearly disappear.
Again, using my 9x11 DD with the nail and dime, the dime is nearly completely masked swinging in either direction unless I swing at a very slow swing speed. Then, the audio is poor at best and only serves notice to examine further (rotate!)
Both coils easily detect the 6" dime but the 4x6 is the only one that gives a very faint high note on the 7" and 8" dimes. But these signals were very faint and I needed to be right over the target. In real hunting I would have certainly passed over the targets. The 5" DD was absolutely silent on those targets. In addition, the 5" DD is a bit noisier than the 4x6 putting out more high pitched "tics" at the identical SENS level. I wouldn't raise the sens on the 5" any more than I had it.
With a steel bottlecap buried at 4", the 4x6 yields a much more broken audio signal when swept over the center of the coil with a repeatable iron tone when swept at the tip of the coil. The 5" DD responds like the big factory DD giving a clean sound in the center then a repeatable iron tone again when swept at the tip of the coil.
I have a rusty nail buried 1" deep and 6" apart from a silver dime buried at 4". Both coils do an excellent job separating both targets at very high swing speeds with a slight edge going to the 5" DD. The audio was just a little 'cleaner' on the dime compared to the 4x6. You begin to reach the limit of how fast your brain can process both signals. IMHO, neither coil excels over the other, but both coils are far superior compared to the factory 9x11 DD.
Using my 9x11D D, I can see easily see the 7" and 8" targets, with accurate ID, if I swing using a normal to fast swing speed. If I slow down significantly, or do the Minelab 'wiggle', the 7" and 8" targets nearly disappear.
Again, using my 9x11 DD with the nail and dime, the dime is nearly completely masked swinging in either direction unless I swing at a very slow swing speed. Then, the audio is poor at best and only serves notice to examine further (rotate!)
Idaho-Marke
New member
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Glen in Maine
New member
Just for information.... I have had the 6.5 coil on my f75 for about 3 weeks and have gone to the same park for years now and am still finding things that I have missed with other name brand detectors and coils. This coil works very well for me... great separation and pinpointing. The settings I have been using are ... Mode JE, Disc 16, Sen 70-80, tones 3H, ground balances around 78. There have been times that I have had to do a frequency shift if it gets a little noisy. I hope this may help others.
Idaho-Marke
New member
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