Has anyone else had this happen? I was using the same settings I use in this area I go to. My tuning process was the same, but the last time I tuned, the ferrite wouldn't balance out. The detector still worked great but I couldn't figure out why it wouldn't balance the ferrite out.
Should I have done a factory reset or something and just put in all the settings again?
It’s been awhile since my last post, but I’ll be sharing some knowledge and anecdotes more often, now that my summer job is a thing of the past and I’m free to once again roam the desert southwest, wielding the power of the mighty Zed to unearth nature’s golden treasures.
I was carefully gridding (or - in deference to Gerry in Idaho - crawling) an old nugget patch during a recent trip to the far flung reaches of Nevada’s golden triangle, when the hypnotic drone of the threshold was suddenly broken by a sharp, double “wee-ooh, wee-ooh”. This type of response typically heralds a small and shallow target, usually within six inches of the surface. “Most likely a boot tack or bird shot”, I thought to myself as I crouched down and scraped an inch or two of the dry and dusty desert soil away from the target zone with my pick. Another swing of the detector coil indicated that I had moved the target, and a quick sifting of the material with the hand scoop revealed a small yellow nugget...the first catch of the day! A few more of these shallow pickers were dug during the the next couple of hours, and then I heard a faint, single “wee-ooh”. Knowing that this meant a bit larger target at depth, I went to work hacking into the densely packed soil with my pick until...well, I’ll let this short video tell the rest of the story:
The actual weight of the nugget turned out to be 5.6 grams, bringing the total for the day to over a quarter of an ounce of the good stuff!
I just got back from Rye Patch, Nevada; found 14 small nuggets; 6.2 grams total.
I found nuggets with all three of my X-Coils; 10” round bunch wound; 17” round spiral wound; and 17”x 12” elliptical spiral wound.
I have attached a chart that is compiled from testing of the 10” round and the 17” round coils as compared to the Minelab GPZ 14 coil. The testing was accomplished in a Rye Patch gully by placing a two foot PVC pipe into a freshly dug hole. Gold nuggets of various sizes were lowered in a medicine bottle by a cloth measuring tape.
This test was for my own relative comparisons; so those that want to critique the methodology feel free to do it another way. Two obvious depth improvements would be gained by increasing the Threshold setting and using headphones to listen for barely perceived target responses.
After discussions with Lucky Lundy and Gerry McMullen I now have found a middle ground that works for me with the following settings;
High Yield, Normal
Freq. Auto, Sens 20, Volume 12
Threshold 1 to 27 depending on EMI noise level
Tone 53, Vol Limit 12
Auto Smoothing Off, Ground Balance Auto, GS Off
The 10” is very sensitive but noisy. When roaming across the desert it has me swinging back over false targets much of the time. But it works quite well to slow down and get into small openings between the sage brush and close to bedrock in narrow gullies.
Some quick checks make me think that the 17”x 12” will have similar depth performance to the GPZ 14. But will cover three inches more ground on each swing. I will chart some depth comparisons when I get time to do some more testing.
I use the 17” Spiral Wound Round coil when I want to cover a lot of desert. The extra inches in circumference with a little extra depth penetration over the GPZ 14 coil is an advantage.
At this time I am retiring the Minelab GPZ 14 and the GPZ 19 coils.
I have no connection to X coil, or to Davsgold except as a customer. X Coil and Davsgold have both been very responsive to my emails.
Have a good day,
This poll is designed to see who is currently using either the Minelab SDC or GPZ detectors with a component of identifying anyone who actively uses both. (I hypothesize there may be a selection bias in this forum in favor of more detectorists who use the GPZ even though sales of the SDC are much higher.)