he he he he he ...........

No Doubt as usual max knows everything especially with sexy girls!:p:p:p:p:p

The Physical Principles of Radiesthesia (Collected Papers: 1944-65) by Joseph Cecil Maby is listed on Amazon but is currently unavailable. If it's any help, the ASIN is B0000CN5E9

Or ... you could buy one of these -> http://cgi.ebay.co.uk/TESLA-GOLD-TAC...item19b84598f2 :lol:

Randy,

I searched the country for it and found there are a few libraries that have a copy but will not loan it out. I think they said it was a home printing or something like that so there are very few copies. There are a few copies in libraries in UK and France, but I didn't check on the availability. Anyway, I read somewhere the papers are hard to follow and poor quality printing, and Tromp's "Psychical Physics" is much better. Don't know this as a fact as I've never read either of them.

Another Study to confirm LRL Detection of Buried Metals
 

Hi Randy,

You're right. The geotechnical aspects of Rota and the other experimenters are what caught my interest, along with the "ground antenna" work. There is a body of evidence as well as a technology associated with these. Their theories and discoveries could be useful for building experimental instruments to locate ore deposits or other buried things.

Also, the telluric currents were used to power telegraph signals in the days before radio and telephones. As I recall, there were specialists who could choose good places to drive rods into the ground that would produce enough current to drive telegraph lines without using batteries. They could simply string a single wire and let the ground rods provide the return path as well as the power. In places where telluric conditions were poor, they had to use batteries with a 2-wire transmission line. It seems these "ground battery" driven telegraphs became stronger with age, same as what Roda says. If I had the time I would be experimenting with these things too.

P.S. Don't forget to answer your emali.

Best wishes,
J_P

Hi all
Take a look at what I have found.This detector is very sensitive to electromagnetic fields up to 100microTesla. This is the sensors that OKM Manufacturer uses in their
Detectors for imaging what is in the ground. What do you think, will this work for detecting electromagnetic anomalies Esteban?

Although the FLC100's primary purpose is to actually detect leaking EM emanations and from very close distances, yes it could be converted to the purposes you mention.
But for this, some mods would have to be done such as different frequency span, narrower bandwidth (for pinpointing) and possibly a bigger coil to match wavelengths better.

IMO there are other more effective ways to long distance metal detecting if this is what you mean.

Also, how do you know this is the Rover C sensor?

Regards.

Welcome Hung
About the rover c unit once upon a time I bought it and I opened it up and saw this sensor.Anyway I also bought this same sensor and made a duplicate rover c.It was easy to clone.It uses a microcontroller called C-Control and this FLC sensor.
It didnt work.......as advertised.
So tell me Hung what is another way that you suggest we can detect Long range targets?
Please give your experience and opinions.
Thanks

This kind of sensor is not useful for long range (some meters). You need a more big coil here for to detect the magnetic anomalies caused by buried metals in the soil. A small coil is not good for detect at distance. A big coil is influenced by all kinds of magnetic interferences. An adequate coil is medium size, few turns. Or loop-core system low in ohms.

Hello All
Yes Esteban I agree you need a coil in order to be
able to detect magnetic fields of buried metals.
But please explain how you can do this using an
IB Metal Detector?????You have much experience in
this subject.
Thank you

Hi Astrodetect and Esteban,
I would also like to know this technique. From what I know, IB detectors are very unstable when you tune them to the limits of their sensitivity. What circuits can we use to keep the IB detector stable for use in locating distant buried metals?

Best wishes,
J_P

I prefer an off-resonance type, because not depend of the zero in coils. An only IB detector (or another type) doesn't work alone. This is supporting by RF sensor. The white noise of RF receiver (FM) "help" the final audio stage (beeper), because the beeper is in the edge with this method. Also because the RF detector make "his job". So, we have 2 detectors.

You are constant off-resonance type.

hello esteban: then the circuit 5 of pd is fm?

Actukally a near death experience is the best as they get to review their life and find out what to total screwed up mess they are.
Goldfinder

Very good! But: why "they" and "their"?

Do you belong to the immortal?

You can use FM radio receiver instead ferrite section.

Hello Esteban
Maybe it would be better to use a phase comparator to read the difference in phase modulation of the TX of metal detector instead of FM receiver?
What is your opinion?
Thanks again

Is possible. As you know, when is transmitted IR rays, for example, at 1 Khz, you hear the tone in the FM receiver. This appears a kind of phase shift in the receiver (FM). The phenomenon causes by buried metal in the ray change the state of phase shift and can be converted in audible signal. Remember that here the IR is the transmitter. I think your TX coil must be automodulated in audio in this case, the same of the Heathkit TX.

Thanks Esteban
So if we use a phase comparator and insert in one input the TX signal modulated at 500hz from the Heathkit, and in the other input the signal from the RX stage then we get the difference when we are in the vicinity of the phenomenon of buried metals????
Thanks

the pd version 2 little components
 

hi guys, here show the second version experimental of pd, these is very nerveous, but very promise, but this is in exaustive modification, due excesive brious, tries for put the correct stabilization and voila! i think this draft more in warm sun, here we have winter, but these detect too ufos

Another Study to confirm LRL Detection of Buried Metals