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,
I am looking to buy an additional coil for my MK 14kHz to get some extra depth while in the field. I cannot decide between AF35 and KR40. Could you please advise which coil shall I purchase to add some depth for coin, jewellery and relic hunting and why?
I would really appreciate your answer!
Thank you in advance!
By Glenn in CO
Does anyone know any information on the new coil for the TDI SL and if the coil will be available separately?
TDI SL is now ... TDI Hi-Q
A new high performance coil design for added depth -
in two options
TAN Part Number: 800-0334-Hi-Q