Re: Reply to Terence Geary

[Carl]

>Will the fluxgate magnetometer be sensitive enough to detect the presence of a black magnetite deposit in a stream? I would rather build a fluxgate than a proton magnetometer with the twin water bottles.


>Randy Seden


>Simi Valley,Ca.


I don't know the relative sensitivities of the two types. You might look at the Mag page, I have links to a few other pages that might offer more info. Try Phil Barnes or Dan Fountain.


- Carl

[Carl]

Re: More on PCBs

>Will the fluxgate magnetometer be sensitive enough to detect the presence of a black magnetite deposit in a stream? I would rather build a fluxgate than a proton magnetometer with the twin water bottles.


>Randy Seden


>Simi Valley,Ca.


I don't know the relative sensitivities of the two types. You might look at the Mag page, I have links to a few other pages that might offer more info. Try Phil Barnes or Dan Fountain.


- Carl

[scubaman]

Re: Reply to Terence Geary

Actually I think you are right and wrong. They probably weren't


using mags back then but I think it is a better choice for his


purpose now. A decent mag should be able to find a truck 10 to 15


feet in the ground with no problem even from a distance. You are


going to have to be right over it with a two box and at 15 feet I


question whether it will detect it. I think a mag is a good choice


but finding one on a shoe string budget is the problem if you can't


build one.


Terence, you might say how much you can spend as your idea of shoe


string versus another might be 2 different things. Someone here may


have one for sale in your price range or be able to build you one.


Good luck,


Charles


> The Proton Mag Forum


>


> Terry:


>


> I can only give you a few opinions which is not too important as I am sure


you will get better ideas from others on this forum.


>


> Firstly I think your query is OT (Off Topic) to the best of my limited


knowledge on the subject. To my knowlege Magnetometers were NOT used during or


shortly after WWI because they would have been >


> I am certain that MOST (if not all) of the devices used for finding mines


were crude metal detectors using electromagnetic induction as opposed to the


principals which make a mag go.


>


> Therefore in my opinion you will be better off on a Metal Detector Forum.


>


> Based on what you say you are looking for I would (if it were me) select on


of the currently manufactured "two-box" detectors. There are about five of


them. According to one review that I saw the b>


> Second guess would be the HAYES DS-7 Deep Search SUPER because with their


handle extension they ADVERTISE down to 28 feet. Personally, I do not like


them as well.


>


> Shoestring? depends on how big a shoes string. These units are $400 to $600


new and used about 2/3 that price if in real nice shape. For what you are


looking for I would not look for anything chea>


> I would suggest you find a local detectorist who is willing to check your


site and see how bad mineralized the soil is as that will have something to do


with your selection process.


>


>


> best,dale


> [email protected]


> 103 North Sixth Avenue


> Virginia, MN 55792 USA


>


>


>


> __________________________________________________ ____________________