A
Anonymous
Guest
Well have quite a bit of time in the AZ nugget fields with all 4 Goldquest coils. 2 are mono's from Eric and 2 are DD's from Reg.
On the monos from Eric....to my surprise...the 11" is best. The 8" is not any more sensitive to smaller gold but it is more sensitive to ground and being bumped against rocks. In order to hunt with the 8" without it falsing when bumped against a rock the delay has to be above 13usecs...almost at 15usecs. This negates any possible gain in smaller nuggets with the delay increase.
The only advantage is getting into smaller spaces but then it also does not have the depth then of the 11".
So for the moment I do not see much applications for the 8" in most nugget hunting applications here in AZ.
The 11" coil is great and that will be my mono choice.
As far as the DD's I have used two from Reg. Here the same pattern applies. The larger 11" dd was more stable and just as sensitive to small gold as was the smaller eliptical DD.
The smaller eliptical DD has the same issues as the 8" mono..it falses when bumped on rocks. Although it is no where near as bad....and is far more stable than the 8" mono.
Now there is nothing wrong with the two smaller coils in the sense that they do not false when bumped with a stick etc.....it is an issue in the hot gold bearing streams and bedrock. The only way to quiet it is to increase delay.....I think NOT.
This in no way should reflect on any applications outside of AZ nugget hunting as I have no idea how ground will respond at a beach or nugget hunting in Alaska and so on.
So unless there is a physical size reason to use an 8" coil i would not get one. The 11" mono and DD will outperform their smaller coils in everyway......unless you are hunting in a 10" wide creek.
Scott
On the monos from Eric....to my surprise...the 11" is best. The 8" is not any more sensitive to smaller gold but it is more sensitive to ground and being bumped against rocks. In order to hunt with the 8" without it falsing when bumped against a rock the delay has to be above 13usecs...almost at 15usecs. This negates any possible gain in smaller nuggets with the delay increase.
The only advantage is getting into smaller spaces but then it also does not have the depth then of the 11".
So for the moment I do not see much applications for the 8" in most nugget hunting applications here in AZ.
The 11" coil is great and that will be my mono choice.
As far as the DD's I have used two from Reg. Here the same pattern applies. The larger 11" dd was more stable and just as sensitive to small gold as was the smaller eliptical DD.
The smaller eliptical DD has the same issues as the 8" mono..it falses when bumped on rocks. Although it is no where near as bad....and is far more stable than the 8" mono.
Now there is nothing wrong with the two smaller coils in the sense that they do not false when bumped with a stick etc.....it is an issue in the hot gold bearing streams and bedrock. The only way to quiet it is to increase delay.....I think NOT.
This in no way should reflect on any applications outside of AZ nugget hunting as I have no idea how ground will respond at a beach or nugget hunting in Alaska and so on.
So unless there is a physical size reason to use an 8" coil i would not get one. The 11" mono and DD will outperform their smaller coils in everyway......unless you are hunting in a 10" wide creek.
Scott