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Hi İvconic,
ok emfad is not a magnometer.
just ulf or vlf
I can not understand that
our vlf detectors like garret and whites, they have transmitters which is really close to target than base stations of radios or else.and they can not penetrate deep.but this emfad does.HOW can it do this.
frequency used in detectors is lower than emfad recievers.
and how can differ cavity and metal?
in pics I tried to show dept determination of ulf .this is my idea but logical.
there are lots of stations on earth.each have different frequencies this is why we ne broad band reciever .
each color in pic represents different station and frequency.
according to drawings
angle CAO = angle CBO ,say X degree to this angle
our selonoid winding(antenna) also has recieveing angle which is equal to 2X degree
so
we measure the lenght between A and B ,= L
then divide 2 = L/2,
sin(X) / cos(X)= TAN (X) =dept of target / (L/2)Comment
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Hi
while you look at this pic,think that the path you are walking on is sank to the level of target and think A,B,O at that level.it will be easy to understand my thoughts
thanks for yur interest
and can not we increase dept by using transmitters
I know it will not be posibble to use transmitters everywhere,but just an offer.Attached FilesComment
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"
For the first step i'll choose to make a receiver which is about to receive
those freqs. That receiver should have a very narrow angle of rx.It just
need to include a highly directional "antena". It will be only a first step.
.................
It is a start.
Waiting for reply...
"
I can not understand you want to narrow angle.
if we want to increase dept,it is related to power of base stations.and can not help in this manner.
but willl effect dept measurement badly.
because our user wil be a man and wont have constant walking speed.if he walks for long we can say approximately something.but in short distances it will be problem and this could occur when you decrese angle.
because chip will count time between start and end of signal .than uses this to have approximate L . than calculate dept.
so we can not decrease angle much.
since decreaseing angle does not have adventage on dept penetration.In my opinion no need to do this
thanks
I talked much ,I hope you will not angry meComment
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decreaseing angle has adventage over pinpointing
but if we use a speaker and meter we can pin point .determination of dept is the difficulties one for this project.
but the only way of having good dept measurement is keeping away from decreaseing angle much.Comment
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....
You concluded very good points there....I agree.
But with UG 12 i noticed very good theory and bad praxis...???
I am very busy these days, I'll find some spare time and try to think the way you think and than post some of that here...Very pleased that you showed interest for this subject.Sorry cose now i can not talk to much here.Thanks for your posts...See ya in next weeks...
regardsComment
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End of this thread.....
Michael: "Here in Middle east situation is high stuffy and we scare of our lives. treasure
hunting is really forbidden and intelligent service pursues treasure hunters."
Neronc: "The situation is the same in Belgium. It is a small country and I would not certainly
say in this forum if I had found a treasure. I am certain that since the following day,
I would have some problems. All is known here."
************************************************** *************************
The situation is the same in Serbia too. There are a lot of locations here protected by
state institutions. Police is doing a great deal of job on protecting those from
ilegall "archaeologists" and so called "tomb raiders".....
It is very hard,almost imposiblle to smuggle such a big pile of coins just like that..
I do not beleive in such "sweet" story at all...
************************************************** ***************************
Leto: "$2.000,00 or $12.000,00 ?? And the question is how were the 100 gold coins smuggled
from Jordan to USA + intelligent service behind..??Hey but yes..detectorists are
damage-makers for archaeologists."
************************************************** ******************************
Good point! So many jars in sand and so many smugglers there, i supposed!?
************************************************** ******************************
Leto: "I do not understand Hungs bad attitude towards Carl... finaly Carl helps Hung
advertising mineoro with existance of this forum and this thread... who knowns how
many naive people bought mineoros and other C.#.#.P. devices with help of such golden
found forum threads. Hey Carl maybe mineoro should fund your server bills..."
************************************************** *******************************
No wonder at all...It is almost fact that Carl helps Hung advertising mineoro with
leting him to open every day new thread with same subject!?
C'MON CARL ! LET'S COUNT THREADS HERE WITH VERY SAME SUBJECT! ALSO LET'S COUNT
THREADS HERE STARTED BY HUNG! LET'S COMPARE THOSE THREADS SUBJECTS!
ALSO, LET'S FIND EVEN ONE "HUNG'S" THREAD IN WHICH MAN CAN READ AT LEAST ONE
TECH TIP,HINT,MOD OR SIMILLAR !? N O N E !
MINEORO SHOULD FUND CARL'S BILLS MUCH.
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Kev.: "Liars are cheap, some pathological types will even do it solely for the satisfaction
and intrigue."
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I agree! One of them,here have patological need to be present everywhere,to be seen,
and to be known....so he is everywhere...posting same old nonsences again and again..
I am sure that you know his nick. Mostoften on this forum....
************************************************** ***************
Carl: "According to Mineoro, this forum is hurting their business. Damasio is quite upset."
Like hell! I bet he is very satisfied with this forum. Mostly thanks to your
patienty and habit to alow everyday anoyance from same man,day by day.
You are ready to delete only "dirty" language, no matter of honesty...and at the
same time you are ready to alow dirty mind posts with "sweet&polite" language....
************************************************** ********************************
Hung: "No. The bad attitude was not from me. Carl posted that 'silly' clues postings trying
to induce people to believe Mineoro paid Mitchell to 'advertise' their detector.
Esteban and I presented the true story which 'debunked' any speculation on the contrary."
************************
Hung or whatever your nick is, YOU are provoking bad attitude here! I guess that was
your idea from the begining...
You should backup your tales from time to time with some fact and proof...
***********************************************
Jim: "Ah yes, young hung…just how are you privy to such information. Either you are involved
in the scam, or a victim. Time to come clean..."
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Good morning Jim!
*************************
Carl, the guilt is all yours! Think twice! Only you can do something here...nobody else!
First time i visited this Geotech Forum i was delited. So many technicals....almost
like a dream to me.
With characters like Hung, this place becamed hell, thanks to your "do nothing" game...
What you doing here is not democracy for everybody to have same rights....no....
lately it turnet to a joke.... a big joke...! And mineoro is taking all the credit
from it...
Sorry for criticism...but i am very straight, i am telling you only what i am thinking
for real....
************************************************** **********************************
I was thinking to post here many of my designs on MD subject. Also i developed a quite
new devices with a few quite new techniques involved, for free, to share with other people...
To exchange....to make new friends...
I also was thinking to post a several schematics of complete designs of brand new machines on
market today, which nobody have yet....
But sorry, this is not gonna happen here! Thanks to unfair treatment on RObert, SOny and some
other of my friends,while at the same time some "yo-yoes" enjoy kind of immunity to do whatever
they want to do without penalties...
P.S.
A short story....
Once i asked Jackdetect, why he is not present so often here on these forums......And guess
what was his answer....???
I am not gonna tell you here...i'll just say:
Good bye!
Comment
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Hi Ivconic ,Esteban and Michael,
I was thinking about zahori
and emfad
you know emfad recieves signals reflected by metals .it has directional
antenna that just recieves from underground.while passing over target.
it is a wide range reciever and gets different frequencies at the same time
.
adjustment of EMFAD from
"
Use the tuning knob ‘B’ to detect a local maximum and adjust as
accurate as possible. Adjust gain ‘C’ so that the pointer of the display
instrument (meter) is in the centre position. The highest reading will be
the local maximum. In case the pointer moves all the way to the limit,
you will have to readjust gain ‘C’ again to a centre position and continue
with the adjustment for the local maximum. Then hold the equipment
vertically and once again use the gain ‘C’ to adjust the pointer to a
centre position.
• In case no local maximum can be detected turn the unit by 90° on the
horizontal level and search the area again.
"
but zahori looks like a little bit different.
it 's frequency is between 10 hrz and 1000hrz
but not wide band .
you start from 10 hertz and trace down till you find a frequency ( or 1000 hrz to 10 hertz)
(any frequency.,one frequency of a transmitter (base station near)that is behind of user.)
then you reduce frequency to find (recieve ) any reflection of previous
frequency.
WHY MINEORE İNSİST ON NORTH TO SOUTH SEARCH?
fOR ME İT İS THEİR FAULT OF THİNKİNG
AT THE NORTH OF BRAZİL (WHERE MİNEORO SETTLES) THERE ARE LOTS OF USA NAVY BASE s. MAYBE ONE OF THEM ,MAYBE ALl OF THEM PROPAGATEs this low frequency
look at this chart
Extremely low frequencyELF13–30 Hz
100,000 km – 10,000 kmCommunication with submarinesSuper low frequencySLF230–300 Hz
10,000 km – 1000 kmCommunication with submarinesUltra low frequencyULF3300–3000 Hz
1000 km – 100 kmCommunication within minesVery low frequencyVLF43–30 kHz
100 km – 10 kmSubmarine communication, avalanche beacons, wireless heart rate monitorsLow frequencyLF530–300 kHz
10 km – 1 kmNavigation, time signals, AM longwave broadcasting
and ivconic
at gisco home page there is a new unit called WADI to find water at 100meters ..work at 10-30khz .
IF YOU SAY ZAHORİ 'S FREQUENCY İS TOO LOW
YOU WİLL TELL TO US WHAT TO DO FOR ANY FREQUENCY RANGE THAT WE COULD DECİDE.
MAYBE 44-142KHZ
OR ANY FROM LİST ABOVE.
now you know my idea
please tell me why this can not be done while emfad can do this.Attached FilesComment
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EMF detector
About this, can the circuit on this link helps on your proyect?
I hope this can help
Regards
Nelson
Originally posted by ivconic View Post
I was busy last week....but since promised some ideas
here is a primer on main part of vlf/ulf receiver....
For the end i sugest a simple 10.7 IF from some radio
.....for example u can use some based on CA3089 or even
better on MC3357 or similar...3361,3371,3362,3359.....
even a simple transistor design would do a job.Further
analyze can be obtained,taking a part of signal from
later stage....(i am preparing some schematic on that).
For antena I would sugest a loopstick or even better
special design i am preparing and gonna post it soon.
You may experiment by winding 600-100 wind. of Cul 0.5mmm
on ferrite core, 30-45cm long and 3-6cm thick.
This is just an idea,I am very busy these days and off
.net so here is a little something just for a start.
regards....Comment
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.....
Sorry man....i lost myself in quite different designs last couple months...
ULF project i started last year is here in my workshop....waiting....
I'll need to finish some things this summer and than when find some spare time to continue with this...
This is not simple, it will need much more time,passion and attention to finish it....
I'll be back here than....when have something to say and offer on this subject...
Until that....regards!
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what happened to this project.Comment
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I talked to you a few years back about the ug-12. I could never make mine work as I am too far from the tx's, however I wondered if you would sell me the chip out of yours if u are not using it anymore. i did like the processor and software and wanted to use it with something else at some point. If you still have the PIC, and would sell it or even the whole board, please shoot me a price. Thanks, MikeOriginally posted by ivconic View PostComment
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Ivconic don't read this site!!!GeoComment
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OK, I will try to find him somewhere else.Comment
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Hi buscadero!
You might be an interesting booklet on UG-12?
Regards!
SneshkoComment
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