Clearly, with the huge amount of interest that is being shown in the after market coils for 7000, it`s obvious that there is a market out there for coils other than 14'' and 19". I don`t take the 19" out much because I have had very little success with it and with my bad wrists it`s just too damn heavy, but Minelab did tell us in the early days of marketing the 7000 that they would be releasing a 11" coil down the track, and now there is another company that nobody has ever heard of making a huge range of coils that are lighter and have so far been very well received by the public.
What`s going on Minelab?
I have a Vaquero with the stock 8"x9" concentric coil. I'm wondering if I should get a DD. There are quite a few out there, for example the Tesoro 5"x10" (stock on the Lobo SuperTraq) and similar size (open structure, though) by Mars and also Cors/Nel. I'm only interested in coin hunting with this detector. Anyone out there with experience care to comment whether or not I'll see (hear!) much difference if I get one of the DD's?
I bought this GPX 5000 second-hand and when I first had it it worked fine, but now when I turn it on it doesn't seem to be able to detect any signals. If I wand it over a large piece of metal it just about detects it and if I turned the unit on and off it seems to improve it. Could it be the coil?
I've made a video :
Managed to get two hours in today before rain chased me home with the 17 inch Russian X coil.
Blew me away just how good this coil is ! I purposely picked a small area of State forest that I have flogged for the last 10 years, with all 3 different GPX detectors, with coils from 11-25 inches, the SDC, and even a QED. This spot has yielded many ounces of gold to me from 0.05g up to 33g. I had declared it " dead ", as my last 10 or so efforts with the standard GPZ14 and GPZ19 have yielded nothing more.
2 hours in today, nearly back to the car, and I get an obvious signal. This was slightly downhill from a small patch of small reef gold, in an area that I have literally smashed.
Coil was about 2 inches above the ground because of sticks and clumpy grass. Removed said obstacles and signal firmer. 4 inches in and I am in nice gravel, target now screaming, out pops what turns out to be buck shot. Bugger, but this is from a spot that I have NEVER managed to get a target in !
Moved about 10m along and same thing, another obvious target, once again coil 2 inches over the ground. Dug in and same again, 4 inches down in nice gravel, target screaming louder than the buckshot, out pops what turns out to be an 0.65 gram bit of reef gold ! I'll be buggered, I thought !
Rain then chased me home.
Coil was very sensitive, being able to pick up my 0.11g test piece at 2 inches. I tried knocking the coil against a tree a few times and no bump sensitivity. 17 round weighs the same as the GPZ14. All in all, a fantastic coil. Don't know what the Russians have done differently, but Minelab need to have a good hard look !
Further testing to come when our shitty weather finally breaks.