Quote:
Originally Posted by Seden
Steve,
There is enough natural radiation that you might be able to detect smaller metal objects if you went to some of the higher frequencies which is something I'd like to try.
Theseus,I'd really like to know about my reputation that precedes me. Having my phone number,address,and birthdate are easily gotten off the net so I don't feel threatened or intimidated by sociopathic behavior.
I would like to hear what you feel what be a good circuit for prospecting.
What about using the abundance of background radiation from .001hz up to gamma rays?
Randy
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Randy, I only use standard type detectors so I would have no idea what frquencies would work for prospecting, if you mean a passive type electronic device.
If you are referring to VLFs for prospecting, you probably have an idea, looking at what is for sale on the market, higher frequencies for small stuff and lower freq. or pulse for larger items.
Perhaps Esteban and others have figured out a method using BFOs with various antenna configurations, I would come closer to believing the possibility of this working over pivot point devices, that would seem to be more challenging as far as successful operation.
As far as circuits, I am not a electronic builder.
I look at this from a standpoint of how practical something works.
You mention being able to pick up signals from small gold thru means of passive devices, that would be great, if ground signals can be screened out or ignored.
I see where the mention of using a FM radio as a receiver, the higher the frequencies get, the shorter the waveform will be and I would imagine their usefulness for treasure hunting would be questionable but hey, maybe someone can mod a cell phone to pick up emissions from the ground?
I read somewhere that the military has a vehicle that can look into the ground and can tell the diff. between pulltabs and rings, probably anything else but it is necessary to wear a lead suit while operating.
The cost would be out of the reach of anyone except gov.
Large gold is not of interest to me, if I knew where some was buried I would
1 Buy the land
2 Get a very powerful PI with large coil(s)
3 Get a backhoe and sluice and start digging
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Regards.