New detecting method?

[WM6]

Dear who ever

a SAMPLE NOTHING TO DO WITH REMOTE SENSING.

Ian (ERNIE) Parker

Hi Ernie which SAMPLE?

Who assessed what LRL is and what LRL is not, and under which criteria?

Have you met Mr hung today?

Happy long range locating to you.

[Ernie]

Sample

Dear who ever

Re: This is a LRL/Remote sensing thread. Your article relates to a SAMPLE NOTHING TO DO WITH REMOTE SENSING. Could you please take this dissussion elsewhere via Carl

kind regards and happy prospecting

Ian (ERNIE) Parker

[g-sani]

watch at this:
20.3 kHz
ICV, Tavolara, ITALY, 20kW ERP (or 100kW?).
Oct./99 1015 received by DG4BAS in msk


the nearest strong radio signal for you and me !!!

maybe it will help you !!!!
friendly , epitopios

Thanks for the tip epitopios but is it a time table of transmition of this station?
I believe that they only transmit certain hours.

[WM6]

watch at this:
20.3 kHz
ICV, Tavolara, ITALY, 20kW ERP (or 100kW?).
Oct./99 1015 received by DG4BAS in msk


the nearest strong radio signal for you and me !!!

maybe it will help you !!!!
friendly , epitopios

Some different data:

ICV 20.27kHz Tavolara (Italia)

ICV 20.76kHz Tavolara (Italia)

[epitopios]

I believe thats more comfortable for the treasure hunter.
And from one point of view is more practical even for the electronics engineer while having a major problem solved.
When it comes to the gold gun sold whith a transmiter the electronics designer prefered sending the signal direct into the earth using probes.

watch at this:
20.3 kHz
ICV, Tavolara, ITALY, 20kW ERP (or 100kW?).
Oct./99 1015 received by DG4BAS in msk


the nearest strong radio signal for you and me !!!

maybe it will help you !!!!
friendly , epitopios

[Krzysztof]

Hi Seden.
In me there is no kimberlit or black sand or pebbles gold.
For the moment I'm finishing 3 version of the gradiometer to the residues after the war and archaeological surprises.
Little transaiwer 400MHz is why?
VLF At small slip.
Best regards Chris.

[Seden]

TURAM system

Chris,

That was an excellent article on the VLF system and yes the last sentence was interesting. So now we're back to an inductive antenna if I read that correctly. In "Mining Geophysics" TURAM is used strictly for Ore bodies but that's what the book is all about.

As I mentioned earlier in this book a HORIZONTAL ~24" Ferrite bar mounted on a tripod as well as a 15'per side wire loop were used for VLF type of exploration. I would try the large diameter 24" ferrite as they can handle some wattage (as I have experimented on 183.5 K.C. with successfully). The ferrite bars are not prone to saturation as easily as a ferrite torroid which can be verified with the formulas.

For the reference signal here in the US I would use the little 400 MHZ transmitter-receiver boards that are so inexpensive.

Randy

[Krzysztof]

Hi Seden.
Do you have a good illustrated examples to seek treasures TURAM system? With Google is a lot of rubbish and a narrow scientific publications for money.
Turam is perfect for the geology of ore. Engineering phase is interesting that the resolution can be obtained. There is a lot of redundant data - You will need a smart program.
If it were available for advanced amateurs will be interesting to face this.
It affects everything VLF, I found something similar:
http://www.eos.ubc.ca/ubcgif/iag/fou.../vlf-notes.htm
Consider the last sentence!
Best regards. Chris

[Krzysztof]

Hi Mikebg.
You are absolutely right. I have past experience in the construction of an amateur on the 4MHz filter ladder with 100Hz bandwidth and less. At 32kHz easily get smaller bandwidth, the more crystals are exactly the same watch. What about modulation A2 ?
Vaino Ronk AIR uses second RX signal from antenna as reference signal , a brilliant idea + todays software that gives a strong instrument.
I hoped to check the simplest method. Lighting treasure chest only to the GND, a simple receiver - preferably with a vertical antenna ferite. Then I have a minimum of receipt by the AIR and directional reception of the order. SPECTRUM LAB is the program straight from the VLF.
Ideally, it was simple, easy and fun, small and cheap. Perpetium mobile not yet.
Is this a useful?
http://www.stormwise.com/page28.htm
Best regards

[Seden]

New detecting method?

Chris,

Go to Google and type in TURAM system. In this you transmit the signal into the ground via ground rods and you have 2 separate coils for the receiver that goes into a phase detector. The coils are separated just like a two box detector and so when you the lead coil passes over the ore body or treasure chest you will get a phase difference. This saves having to have to separate receivers,one to get the air signal for reference and the other for the ground signal. The air signal is ALWAYS the reference as the ground signal is where you are looking for a change due to whatever's buried that's big enough to change the phase in the ground signal.

Randy

[WM6]

The device in posting # 64 is model APEX MKI. It is like Geonics EM15, designed by Vaino Ronka.

Thank you mikebg, APEX is not known to me. I think it was EM15.

However if you swing search head one or two times pro seconde, the GND signal will be modulated by frequency 1 or 2Hz. This is in target spectrum.

Not only ULF modulation because of swinging, but because of handshaking too, a lot of parasitic modulations that suppress target signal.

[mikebg]

WM6,
The device in posting # 64 is model APEX MKI. It is like Geonics
EM15, designed by Vaino Ronka.
Chris,
1. Target signal at metal detecting seems as modulated TX signal with frequency spectrum from 0,1Hz to maximum 6Hz. That means we need RX having bandwidth no more than 12Hz. More bandwidth means more noise. There are sensitive metal detectors operating with bandwidth 4Hz only. We need automatic digital filtering to achieve stabile narrow band receiving. Bandwidth 100Hz means 5 times more noise relative to bandwidth 4 Hz.
2. The modulation index of target signal is very small because RX receives two large signals AIR and GND having the same frequency. If you wish to detect target signal 1uV, but AIR and GND signals are 10mV, then the modulation index is 0.0001. We need suitable automation to increase the modulation index by suppressing AIR and GND signals. However if you swing search head one or two times pro seconde, the GND signal will be modulated by frequency 1 or 2Hz. This is in target spectrum.
3. We need reference signal for synchronous demodulation. For example, Vaino Ronka uses AIR signal from second RX antenna as reference signal. To demodulate weak signals,we should use GND signal as reference.
4. Your TX antenna is absolutely inefficient becase has only one small turn. Read for TX antennas and loop used in metal detecting in site www.geonics.com

[Krzysztof]

Hi Geo.
It does not interest line of completely.
I. it touches it only Tx as lighting lamp Signal grows over purpose according to statistic schedule Gaus. Good narrow receiver wanted only.
It touches it technical colleges it LRL but it not twig, I am technocrat only.

Best regards Chris

[Geo]

Hi Chris
I agree that the treasure will influence the radiated energy (it will grow her or it will minimize). This will become perceptible with receiver above the treasure. However how we will take a "line" with the receiver from the point where we found itself, up to the point of treasure???

Regards

[Krzysztof]

Inventors hello to all.
My humble figure.
Sed.Probes the ground in a triangle to have a concentric radiation underground.
Geo. I think that each antenna will sow the ground surface wave. Im only interested in measuring the electromagnetic wave Reflected from the underground treasure with a very sensitive receiver. Narrowband = 100Hz max. Low noise. Sensitive = 1mikroVolt. There may be a vertical antenna ferite.
Micebg. I know the history of art, now I go to do already without fear.Do private mini-VLF radio station located in a fixed location and look at neighborhood.
I look forward to constructive criticism.
Best regards