We've spent a lot of time here lately on whether to X or whether to CoilTek.
We don't know if we should Z or Q.
We have so many choices we don't know what to do.
Make life simple and get the app:
This might be easier. Forget the coils and forget the manufacturer. 😁
By uncle Scrooge
The black stone is pure magnetite. The purpose of this prototype is discrimination that can indicates very deep targets such as for digging . So far all very deep targets were missed , as well as non-magnetic targets are indicated by discrimination like magnetic (iron ) . The prototype was tested on sand of pure magnetite and can be used to search for golden nuggets , while at the same time rejects the shallow iron objects . In tests on different soils shows very low soil noises , and almost complete absence of false signals . There is a video with the same prototype in youtube , from October 2018 .
GPX 4500. Been detecting for a while in the hills in California (Sierras) where I got started in 1970 ish with my White 5000 D I purchased from Jimmy Sierra at his shop in San Rafael. We’re still in touch although he says he doesn’t get out anymore but loves to read about others adventures.
then moved to New Mexico. I decided recently I needed to try my hand with Minelab and purchased the GPX 4500. I’m finding it difficult to find reading material on settings or proper videos. I have a friend that suggested a setting for the area I prospect in. I got a mono Commander and a GP Series coil with it. Hopefully I’ll find good info on this site. 😎
I’m venturing into the spotlight here with my first post to ask what likely amounts to a novice’s question.
It stems from an experience I had about a year ago with finding my largest nugget. The location was in a small creek bed, which had been conveniently cleared of cobbles and overburden down to a small patch of bedrock surrounded by smooth, silty clay by a dredger.
Using a GM 1000, I had detected out several small nuggets from within the bedrock cracks that had been exposed, but not properly crevassed by the prior prospector. However, the thick clay surrounding the exposed bedrock had pockets of varying degrees of moisture.
This was providing me a bit of challenge since the wetter spots seemed to be behaving just like hot spots. After an extended wrestling match with the wetter signals and the available settings, I gave up.
However, by the time the next weekend came around, I just couldn’t get those wet spots out of my mind. With the heat of the summer and record drought conditions, I guessed those spots may have dried just enough to deserve one final pass.
Within minutes of returning, I had found a solid, repeatable, 2 bar non-ferrous signal in the deepest clay pocket on the upstream side of the rock. (This exact spot had seemed masked the week before.) Digging 4-5 inches down into the smooth clay I found a “rock” that made my detector sing. Cleaning it off revealed a beautiful 1/3 ozt. nugget. Call it beginner’s luck—because I do.
Now for my question. Were those wet spots of clay giving me fits because of greater relative mineralization, heterogeneity of moisture, or VLF technology? Perhaps it was some of each?
Part of my curiosity stems from never having used a PI detector. For those of you with plenty of PI experience, do you also struggle with wet spots or mud spots for lack of a better term? And, if so, are certain PI detectors more resistant to the struggle?
Thanks for any input you might spare.
I bought this GPX 5000 second-hand and when I first had it it worked fine, but now when I turn it on it doesn't seem to be able to detect any signals. If I wand it over a large piece of metal it just about detects it and if I turned the unit on and off it seems to improve it. Could it be the coil?
I've made a video :