I finally got out to test out my new 8" X-Coil, I've been wanting a size like this for a long time. I thought it was going to be impossible to fit the GPZ Super-D design into such a small coil however X-coils after some time have achieved it and it works exceptionally well. I was running my GPZ in HY Normal with gain of 20, manual ground balance all day.
My first pellet recovery 🙂
These were my weapons of choice for the day, the little 8" hardly looks much bigger than the little 6x3" sniper on the GB2. It made the GPZ feel reasonably light too, I ran it all day without my harness which is handy as I was in rocky hilly terrain always putting my detector down so it was great having the extra freedom.
I was comparing targets with my GB2 all day, seeing it's widely regarded as the most sensitive VLF I wanted to see the difference in performance to the GPZ with a small coil. The first thing I noticed almost immediately on little shotgun pellets which I found a lot of by the way was the GPZ was noticeably deeper than the GB2. There were pellets that the GB2 didn't pick up at all where the GPZ had a reasonable signal on them. I also found the Discrimination on the GB2 was near pointless on a lot of targets as it had no signal at all on them only giving a signal in it's all metal mode. The pellets had to be much closer to the coil than they were in the soils for the Discrimination to work, I was quite disappointed in this as I was hoping it would be a good gold discriminating pin pointer.
This area has a lot of hot rocks, by a lot I mean they're everywhere and they're often green, you can't do a swing of a VLF without hitting them on every swing, I've been to this area a lot lately, its where I recently found 9 grams. I've moved on from that exact area I found the gold last time as it dried up but the same general area. The GB2 was of course having a lot of trouble with them, with the Nox I just notch out -8 and -9 and all is pretty good and the Nox doesn't appear to lose depth when discriminating like the GB2 and Gold Monster do. The 8" X-Coil was handling the hot rocks well, most of the smaller ones it was blind to, the big ones, some the size of a football or bigger it would get a signal on, so I tried the quick track button and waving it over the top of one, it took about 10 or so sweeps but it was able to give minimal reaction on one afterwards so I had my GPZ in manual balanced over a big green hot rock for the day so instead of using my Yellow ferrite ring I used a hot rock, it made more sense to me seeing they're the areas problem, correct me if I'm wrong.
My first bit of gold was downstream in the old timer wash channel from my 9 gram spot. I did my usual pellet scrape, the signal lasted longer than a few scrapes, so I did some bigger scrapes and the target was getting better so I took a short video as I was starting to get pretty confident.
It turned out to be a nugget in the gravelly layer below the top soil, pretty small nugget too.
The GB2 did not pick this one up at all until I was closer down to it, that was in maximum settings with audio boost.
Little longish bit.
0.177 of a gram, my biggest of the day 🙂
I walked across to the next wash as that was my plan for the day and was finding my usual pellets and comparing the two detectors, I was finding the GB2 was handy as a pin pointer and it's 71kHz wasn't interfering with my GPZ at all. I was also tipping my GPZ on it's side and using the edge of the 8" coil as a pinpointer and that was working pretty well for me. Seeing I was finding so many pellets, way more than usual in this location I was getting plenty of target recovery practice 🙂
Off to the edge of this bedrock I got another bit.
Almost a little ball, when it was dirty I thought it was just another pellet.
After cleaning the dirt out of it it's not as much like a little ball as it looked. It's a ball with a tumor.
I heard a couple of bikes coming along the nearby track, turned out it was JW and his wife Robyn, they knew I was going to be there today so popped in for a visit, JW also has unfinished business in the area where he's been attacking a rocky wall of the wash for months and still getting gold out of it, he had his 15x10" X-Coil on which was a surprise, he put his 10" on and I thought he'd forgotten how to remote it and it rarely left since, he just loves that little 10". He was impressed with my little 8"', especially the size knowing It can get into places the 10" can't. We started detecting again and Robyn found comfy spot to read her book.
It wasn't long and I could hear JW's usual TAP TAP TAP as he's smashing away at the rock 🙂 I kept checking out the lower areas of the wash and it wasn't too much longer after 5 or so more pellets I found another bit of gold.
It was down in that bit of a gap in the rock.
It was starting to cool down a lot now, well the day was never warm, I guess a maximum of about 5 degrees Celsuis but once the sun starts to go behind the mountains it cools down quickly so I went back to a bit that still had some sun 🙂
At this point I'd seen the bit of gold and knew where it was sitting down in the gravels but I wanted to show the crazy prickle bush I was dealing with, I'd already broken some branches off at this point, look at them thorns! This video also shows the sideways method I was using to pinpoint. The center of the coil is definitely it's hottest deepest spot but the edges are still good.
This was my last bit of the day
And just some scenery shots of the area, gold can be anywhere around here, even in the most unlikely of places.
In between the bedrock is has been the most productive for me, which is why I like little coils.
Everywhere you look are old timer rock piles, they're gradually getting buried by plant life.
Once those giant prickle bushes grow in them, they're no longer detectable.
Piles everywhere though, it goes for a few miles
It's starting to get very overgrown in places, every year it's getting worse, gradually disappearing.
Some of these cliff edges would be great to detect and would hold quite a bit of gold I'd imagine but they're just too steep for me.
This is the sort of stuff JW is chunking away at all day getting gold out of the cracks, he said he's now bought a little battery powered jack hammer type thing to help with the job as it's hard work with a pick, hammer, cold chisel and screw driver but there is a fair bit of gold trapped in the rock.
It's all in layers and you can smash them out slowly with your pick.
And my junk for the day, well the junk I didn't lose from my pocket. So overall I'm very impressed with the 8". It seemed to me like it was exceeding the GB2 in performance on small pellets at depth. I'm still better at pinpointing with a small coil like on the GB2 but with practice I'll get better.
As I was about to leave I went over to see how JW was going, right as I got there he had a target, I took over my GB2 as I know he often uses his one as pin pointer too, especially when smashing out rock as it can save a lot of time. He was using the nose of the 15x10" coil as his pin pointer and said it was working really well, he found the tip to be pretty sensitive but still too big to get down into the spot well so we used the Gb2 to get narrow down where to smash out... after a fair time of hitting he had the signal out, and it was a bit of gold smaller than my smallest bit and the 15x10" was sounding on it loudly. He had another signal in the rock to recover so I left him to it as they can take half an hour or more each to get out.
Finally got out again with the 15" x 10” X-Coil. It ran really quiet and smooth continually in High Yield, Normal, at Sensitivity at 20. Found 10 small nuggets for a total weight of 4.55 grams. They were between 5 to 8 inches deep in a California pine tree area.
The X-Coils work great, but the 15 x 10” is now the go to coil.
Have a good day,
Currently using an SP01 and matching twin Speakers, volume on the Z is 8 volume on Sp01 around 7.5 if not using the Sp01 Volume on the Z is 11, with these settings and my hearing am not sure am getting the benefit of the Sp01, so as above would appreciate comments on twin WM12's ( Speakers are high on the Z Harness along with the WM12, the SP01 in the Z Harness backpack)
Will look at setting up the SP01 and the Twin Speakers on Margaret's 2300 with a Transmitter/Receiver driving the Sp01.
I seen this issue on the oz forum...is anyone besides me having a problem with the 12v charger for the gpz?
I have two- one for my ctx and one for the 7000 and they both behave badly...when I plug one into the 12v outlet in my truck it starts flashing red while charging. The manual says this means there may not be enough battery to pull juice from the truck battery...my truck battery is brand new.
So, I carry a small invertor and plugged that into the 12v outlet, then the battery charger into the inverter...the charger worked fine but my truck battery was drawn down and I had to jump it...
so, the second question is this; does the inverter draw a huge amount of amps to go from 12v to 110v to charge a the zed battery???
Also, is the sensitivey of the minelab chargers adjustable ????