Chet
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Posts posted by Chet
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I do wear gloves all the time while detecting. They protect fingers as trash is slid sideways off of the powerful magnet. Some small black sand and tiny particles remain with no problem except appearance.
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Two part epoxy ‘J-B Weld’ works great to attach and coat rare earth magnets to picks, rakes and other tools. After a lot of use the J-B coating will wear thin but it can be built up with a fresh layer.
Have a good day,
Chet -
Jason
What an ordeal you have been through. Hopefully things will improve now. Maybe you will hit a rich patch and put some of this behind you.
Have a good day,
Chet
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K4PI Mike
Three alternate ideas; attach a hand wound loop/inductor to the end of long pole. With two wires connected to an Inductance meter, a Grid Leak meter or a Beat Frequency Oscillator (BFO). Slide the loop around and along the length of your antenna element looking for a change in reading.
I hope one of these will work for you,
Chet
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The battery is easy to replace. Just four Torx screws to open the case. No soldering required.
Several batteries are available on eBay.
Have a good day,
Chet
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The charge socket for the WM12 is a Universal Serial Bus (USB). The international specification for USB version 3.0 limits the charging current to less than 1.5 amps per socket. So the WM12 and USB charging cable is designed to comply with this standard.
The battery charger circuit is designed by Minelab to safely charge the battery at a higher limited ampere rate that will not overheat or damage the battery.
Have a good day,
Chet
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I found this information informative and interesting. It shows some of the similarities and differences of Australian and U.S. laws and regulations.
Have a good day,
Chet
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Paul
I carry the 7000 on a bungee in my right hand and a 800 in my left hand for discrimination. And they both act as canes when I stagger on the loose boulders.
Discrimination works on the small shallow stuff. Be prepared to move a lot of big boulders for deep big stuff like this.
Have a good day,
Chet
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Jason
Great results and great report.
Thank you and have a good day,
Chet
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Jason
Great information.
Thank you,
Chet
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Jason, thank you for the hours of effort and the great report.
Have a good day,
Chet
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JW
Thank you; and congratulations on your finds. I experience similar hot rocks; I don’t like the big underground pointy ones that tend to give a sharp nugget type response.Fred
It was about 10 miles south of Interstate 40 highway on Havasu Gold Seekers claims.
I did hunt the meteorite strewn field a few years ago for three days. No meteorites were found but again lots of bullets.
Photo attached.Beatup thank you.
Brian
The plan was to gather data for two more comparison charts. The last two days where raining and cold so I cut the trip short. I will try again on the next trip.Steve
You are right on; the short wires are near the surface and can be found quickly with a little scrapping and a strong magnet. The long wires when in a wash can be quite deep and some hunting for just like a small nugget.Have a good day,
Chet
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My first outing with the 15” x 10” X-Coil was a very satisfying experience.
Settings used are; High Yield, Normal, Freq. Auto, Sens 20, Volume 12,Threshold 1, Tone 53, Vol Limit 12, Auto Smoothing Off, Ground Balance Auto, GS Off
I ran a quick test on a 0.08 gram test nugget with the 10” round which produces some noise and false target responses when running with my wide open settings.
Changed to the new 15” x 10” X-Coil and ran over the 0.08 test nugget again. Both coils were getting a good loud response at approximately 3.5 inches.
I ran the 15” x 10” coil for 5 hours a day for 5 days. It was stable and quiet (except for a little very low level EMI). The noise and false target responses experienced previously with the 10” round coil were gone. There were no problems with ferrite balancing.
Franconia, AZ has produced some large nuggets. A 3 lb quartz rock with 15.9 oz. of gold was found there the previous week. It was a US Army Air to Air gunnery practice range during WW2. So you are forced to dig a lot of deep targets. There are a lot of bullets and small pieces of screen wire blasted from the towed targets.
I only found two small nuggets between bullets and wire pieces. They are 0.6 g and 0.2 g.
Overall this is a very sensitive coil and a pleasure to have the lighter weight and ability to get into smaller spaces.
Have a good day,
Chet
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Hi Flakmagnet
That is a good procedure.
Sometimes I have experienced ground with reddish rocks that would not ferrite balance at all. I look around for better looking ground and balance with a little more effort since I had knocked it way out while trying on the hot ground.
Sometimes it won’t quiet down as much as normal. But later hundreds of feet away on some different ground it balances fine.Have a good day,
Chet -
Hi Flakmagnet
I just recently joined the WSPA at Bill’s last outing near Morristown. Hopefully it will provide some new possibilities and activities. I look forward to meeting you and more of the members.
Have a good day,
Chet -
Hi Flakmagnet
It might be worthwhile to get with a dealer or another GPZ 7000 owner to compare detector performance and procedures.
Or join a club that has some GPZ owners. There are many benefits to belonging to a club.
There are a few of us GPZ 7000 owners at Bill Southern’s Spring and Fall outings in Arizona. The next one is near Quartzsite March 20-22. It’s a lot of fun and the cost is the price of a pot-luck dish.
Have a good day,
Chet
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According to JP "RESET ALL" should get you back to the factory setting.
Have a good day,
Chet
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Some additional checks for the X-Coil cable modification.
Before cutting the cable on the Minelab donor coil measure and record the resistance across the four large pins of the Minelab 7 pin connector;
Pins 2 and 3 should be between 0.3 to 0.7 ohms.
Pins 1 and 4 should be between 4 to 7 ohms.
Pins 1 and 3 should be no reading which indicates not shorted.
Pins 2 and 4 should be no reading which indicates not shorted.
The small pin 5 should not have continuity with any of pins 1 through 4 which indicates that there is no shorts to the coil shield.
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Don’t measure the small pins 6 &7; they are the Minelab coil ID pins.After completing the cable modifications:
Repeat the above measurements with the Minelab donor coil connected.
Repeat the above measurements with the X- Coil connected.
If the measurements are close to the recorded values then proceed on with caution to testing with the detector.
Have a good day,
Chet
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Hi Dave
Yes; if the GPZ 7000 does not sense an electrical load from an unattached coil it will provide and alert and shut down. The detector is just informing you that it needs a coil to work properly.
It doesn’t matter whether the disconnect is above or below the adapter cable. With the coil disconnected there is no load the on the transmit transistors so there is no danger of overheating them.
Have a good day,
Chet
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I put together some checks to help when you first fire up the GPZ 7000 after the cable modification. This procedure comes with no guarantee! But is better than having no procedure.To safeguard the detector; time the following steps with a watch.
1. Fire up the WM12; with a Minelab coil attached to the GPZ 7000.
Push the GPZ power on button and verify and record the elapsed times for the following events;
The full operating Screen Display should appear at approximately 20 seconds;
EMI noise from the receiver coil should occur at approximately 30 seconds.
Important note!
As you proceed with the rest of the testing keep time in mind. The transmit power transistors are very rugged and have good heat sinks to draw the heat away and keep them within a safe temperature range.
If there is a short in the cable or coil transmit connections it will overheat the transmit transistors within several seconds and cause catastrophic failures.
So the thing to do is monitor the elapsed seconds for an event to occur. In the following procedures substitute your recorded times for the 20 sec and 30 sec times.
If an event doesn’t occur within 5 seconds of the expected time power down the detector quickly to avoid the heat buildup within the power transistors.2. Now repeat the above test with the new adapter cable connected to the detector without the a coil connected to the adapter.
If there is a short within a new installed connector transmit connections it should display an overload alert shortly after the full display screen appears and should shut the detector down automatically. If this alert occurs be prepared to immediately shut it down in case the automatic shutdown doesn’t!
Otherwise with no coil attached there will be no EMI noise at 30 seconds and at approximately 60 seconds there will be a No Coil Detected Alert and the detector will shut down automatically.
3. Now connect the Minelab donor coil to the adapter. Power up and the full display should appear at 20 sec and EMI noise from the receiver coil should be at 30 seconds.
If there is a short in the new Minelab donor coil connector transmit pins it should give an overload alert and shut down.
If there is a short or open in the receiver pins there will be no EMI or there may be abnormal EMI noise.
Wave a coin over the coil to see that the transmitter coil is working.
4. Connect the new X-Coil and power up again. The full display should appear at 20 sec and EMI noise from the receiver coil should be at 30 seconds.
If there is a short in the new X-Coil coil connector transmit pins it should give an overload alert and shut down.
If there is a short or open in the receiver pins there will be no EMI or there may be abnormal EMI noise.
Wave a coin over the coil to see that the transmitter coil is working.
Have a good day,
Chet -
Attaching a tie wrap with shrink tubing works well for pulling it out of the shaft when it has retracted beyond reach.
Have a good day,
Chet
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Peg, that is outstanding!!! I can see that big smile on your face!
I hope you have some bad weather to shift that sand around. Go get them girl!
Have some more great days on the beach,
Chet
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2 minutes ago, Steve Herschbach said:
You are remembering the fake MSRP. The GPZ started selling at 10K in the U.S. and has had one price decrease since it came out to $7999
As they say memory is one of the first to things you lose, now where are my keys? lol
Leg Of Mutton Nugget, Australia 1853
in Detector Prospector Forum
Posted
This is a long read but a fantastic story!
https://www.mindat.org/article.php/516/Australia's+134+Pound+Gold+Nugget