gold detecting

[Deleted]

;D
Hi,
This is my first post here and I am happy to be involved.
My BIO -- I am a retired NASA electronic engineer and
also retired Naval Research Laboratory Acoustic engineer.
That is in my past and my hobby is electronics and astronomy.
Gold detection is not easy in the usual since unless one invest
in a 20000 dollar gold detector and then you still have to know
where to look.
However, I can supply some advice on gold detecting
on a few bucks. AM radio waves are very sensitive to gold.
Adjusting the tuning of the radio core and wire can pick up
gold and only gold at close range. Also the am radio
can be tuned to different freq. . Now this may sound
almost obvious , however it is presented for two reasons.
First , I think that the young people designing items on this
site can apply some old knowledge. Second, search for gold
and don't try to build a detector to find it all, just gold.
Also, shape of gold is everything. All shapes, rings, nuggets,
coins, and such are all totally different. I would use a 32 bit processor which would monitor slope detection of returned
signal decay from the affect an object has on the coil field.
The main point is to stick to finding only gold and the other
metal detectors will find all the other stuff.
Yes, The user is the key. No matter what detector you have,
it means nothing without many hours of field use.
Jeff

[ssiiddo]

Hi Jeffrey54,
Im new to this post, what you trying to say is that using an AM radio you could use it as a metal detector, providing you use a transmitted rf signal as your signal source to find the difference in signl strenght recieved on the AM radio. To me thats sounds like a BFO detector (beat frequency oscillator), correct or am i missing the point.?
cheers SIDO

[Gary Lecomte]

Personally this sounds a bit funny to me.

I Really doubt it will only detect GOLD, as I have never seen any Gold ONLY Detector.
Some Descriminate against other metals to help in detecting only gold, But that is not a perfect science.

And I really doubt you will get much detection distance with what your proposing.

[Deleted]

Hi,
I mis--- spoke,
The am radio waves are not used as BFO which will pick anything up.
I mentioned the word "Tuned". I am speaking of tuning a receiver to be much
more sensitive to the effect of gold than another metal .this is done by frequency
and learning the response to gold. This would and was not a transmit , receive
type-- BFO. The experiments I or we did showed that an AM receiver could be
configured with a very high sensitivity to gold at certain frequencies in the normal
AM band. WE were not using a BFO technology. This was only recognized as an
effect on the receiving characteristic of AM radio from broadcast stations around gold at certain freq.. This does not mean it could not be tuned to other metals. At certain
frequencies, gold would effect the operation of the AM receiver more than any other
metal than Iron. We did not pursue this any further. We did not use a coil head nor
a metal detector design. just a freak thing we noticed one day while working with
an AM radio. I mentioned taking it to a digital level. I almost think that "Fuzzy logic".
which is cheap if you know how to do it: could change this metal detecting into
a more accurate field. I truly believe that each metal has a signature of some sort
hidden within the disruption of EMF , like DNA. Fuzzy Logic allows people to
sort out signatures without having to know what the signature actually looks like.
I do believe that until more work is done, that 32 to 64 bit processors with stored
EPROM signatures of EMF reactions and comparisons to saw tooth wave form and
slope detection, including inductance and capacitance changes occurring during EMF
distortion is the most promising. Pulse detection has its place and seems to be
trying to retrieve more data from EMf returns, However, with pulse one also has
harmonic distortion and needs to watch out for false information returns.
AT this this time , I am using off the shelf big name brand 32 bit waveform analysis
detectors from well know metal detecting companies to find coins. I am not interested
in gold hunting. If you live near a big city, or the beach, gold rings maybe be your thing.
I like 19th century coins.
cheers

[Deleted]

If I understand your concept correctly, you are stating that if an AM radio is operating and receiving a radio station that is at or near a certain part of the standard AM broadcast band, that gold in the near vicinity will cause a disruption in the radios received signal of the station in some way, through excitation from resonance, in turn causing a distortion or hum or obvious sound alteration allowing the radio to function as a type of unconventional signal strength meter, mostly for iron, but for gold also, but on accident.

Or are you saying that the gold itself is transmitting the signal instead of a near by radio station?

Since you folks discovered this by accident just messing around on your lunch hour, as far as I can tell, the gold you are talking about would not be in the form of nuggets as gold is found in its natural state, but instead would be jewelry of some kind....right?

Is this correct? Would you happen to remember the frequencies? Is it around 1.7mhz? Thank you.

[Gary Lecomte]

Sounds Really Fishy to me.

[Deleted]

I found a product that seems to operate on this principle.

www.treasurenow.com/html/TheRaven.html

[Gary Lecomte]

suninyourhand said:

I found a product that seems to operate on this principle.

www.treasurenow.com/html/TheRaven.html

"LRL's" DON'T WORK.
They are a SCAM.

Fools and there money are Soon Departed.

[Deleted]

geotech.thunting.com/cgi-bin/pages/common/index.pl?page=lrl&file=main.dat