Small gold with a Minelab Explorer SE
SNIPP
Both the FBS and White's multi-frequency systems have advantages. The one thing that has always confused me with the FBS is that it is killer on deep silver, but lacks in the gold area. One would think using up to 100khz would kill on gold, but that doesn't seem to be the case. Oh well, the right detector for the right job.
SNIPP
I have gold samples in the sizes of 1 grain, 2 grain and 3 grain.
I always figured that my Minelab Explorer SE wasn't using the 100KHz frequency all the time; this depending on wich channel it was when we noise cancel automatically or manually.
I have therefore made some tests playing with the channels and looking at the most sensitive one.
I also established that Ferrous rejection could only be set at 31 at most to obtain a reading of my small samples, Conductivity readings were in the 00 to 05 range.
It was mandatory that I set the DEEP option to ON for any detection sensitivity and consistency
1- I started with my 3 grain sample and sensitivity at default of 22 and channel default #5.
-->
Result: the sample was
not detected
2- I then changed channel to #1 and kept same sentivity of 22
-->
Result: 3 grain gold sample was
Detected with some intermittence
3- I set sensitivity to 23, nothing else changed.
-->
Result: The sample was
detected with consistency
4- I tried now with channel #2, 3 grain sample, sensitivity 23.
-->
Result: the sample was
detected with some loss of consistency
5- I tried now with channel #3, 3 grain sample, sensitivity 23.
-->
Result: the sample was
detected with intermittence.
6- I tried now with channel #4, 3 grain sample, sensitivity 23.
-->
Result: the sample was
not detected
7- I reverted to channel #1, used the
2 grain sample, sensitivity 23.
-->
Result: the 2 grain sample was
not detected
8- Still on channel #1, 2 grain sample,
sensitivity now at 25.
-->
Result: the 2 grain sample was
detected
Conclusions:
-Any channel above #3(three) wasn't sensitive to small gold.
-Sensitivity needs to be at minimum set at 23 on most sensitive channel.
-You need to be in "All Metal" with "Iron Mask" set at 32. At 31 it will detect also but less consistently.
-Deep option(in Recovery sub-menu) needs to be set to ON
-Detection of the sample is most sensitive within 2 inches of ends of the DD coils' center blade.
-these findings are also verifiable with the Sunray inline probe fitted on my Explorer SE
I have started a thread to post these findings so as not to occupy anymore space in this one