1m PI-Coil with almost no wires!

[Funfinder]

A week ago I saw the Discovery network report of 2 guys hunting with selfbuilt 4m coil sliding over the ground for meteorites in eastern Kansas. And indeed they found an over 200 pound chunk.

This made me curious:

Anyone here that can tell me with how few windings and how thin wire an 1m PI coil would be realizable?

And what is the normal standard amount used?

Because wires are metal and metal is huge weight if used in very large coils. And not in any region some kind of selfbuilt bike can move the coil over the fields.

[Qiaozhi]

A week ago I saw the Discovery network report of 2 guys hunting with selfbuilt 4m coil sliding over the ground for meteorites in eastern Kansas. And indeed they found an over 200 pound chunk.

This made me curious:

Anyone here that can tell me with how few windings and how thin wire an 1m PI coil would be realizable?

And what is the normal standard amount used?

Because wires are metal and metal is huge weight if used in very large coils. And not in any region some kind of selfbuilt bike can move the coil over the fields.

Try the coil calculator here ->
http://www.geotech1.com/forums/showthread.php?t=17909

[Funfinder]

Thx Qiaozhi for the link and the great idea of this nice calculator.

I guess first we need the minimum amount of mH a pi can drive.

[chemelec]

Thx Qiaozhi for the link and the great idea of this nice calculator.

I guess first we need the minimum amount of mH a pi can drive.

NOT mH.
Try about 300 or 400uH
A 22 AWG would be good.

[ApBerg]

A week ago I saw the Discovery network report of 2 guys hunting with selfbuilt 4m coil sliding over the ground for meteorites in eastern Kansas. And indeed they found an over 200 pound chunk.

This made me curious:

Anyone here that can tell me with how few windings and how thin wire an 1m PI coil would be realizable?

And what is the normal standard amount used?

Because wires are metal and metal is huge weight if used in very large coils. And not in any region some kind of selfbuilt bike can move the coil over the fields.

Hello,

I may have seen the same doc. on the German free to air DMAX Sat.
Think they used a Pulse Star pi detector, for a square 2 meter coil a friend told me he uses 8 turns 0.75 mm wire...

if you can receive the free DMAX sat .. more to come...

[Aziz]

Meteorite Men (english):
http://dokujunkies.org/dokusoapreali...vrip-xvid.html
(obviously only two parts available)

Die Schatzsucher: Meteoriten-Männer (german, started not long ago)
http://dokujunkies.org/dokusoapreali...-dtv-xvid.html

Get'em.

Aziz

PS: No, I am not going to discriminate meteorites!

[mikebg]

PS: No, I am not going to discriminate meteorites!

Because you need hot rocks. The meteorite signal is like hot rock signal (phase lead about 90 deg relative to TX current). However the same phase angle has GND signal from mineralized nonconductive soil.
Unfortunately, the most beautiful and expensive meteorites can not generate signal at air test.
Search the WEB for "blanket coil"!

[Qiaozhi]

Meteorite Men (english):
http://dokujunkies.org/dokusoapreali...vrip-xvid.html
(obviously only two parts available)

Die Schatzsucher: Meteoriten-Männer (german, started not long ago)
http://dokujunkies.org/dokusoapreali...-dtv-xvid.html

Get'em.

Aziz

PS: No, I am not going to discriminate meteorites!

The files are password protected.

[Aziz]

The files are password protected.

dokujunkies.org

[Funfinder]

Hello,

I may have seen the same doc. on the German free to air DMAX Sat.
Think they used a Pulse Star pi detector, for a square 2 meter coil a friend told me he uses 8 turns 0.75 mm wire...

if you can receive the free DMAX sat .. more to come...

Hi!
Cool, you saw exactly the same. Since 3 months every friday at 10pm D-MAX (TV for man @ 19° east Astra sat) shows something about treasure hunters.

btw. I also read the report about meteorites in the "handbook for detectorusers" of Gert Gesink from the netherlands. I'm shure you know it.

Only 8 turns?? Such few windings already will work? Hard to believe. The 1m Jeohunter coil weights around 10kg and for shure has hundred of windings of very thin wire. Neverthless very interesting and a great weight reducement if working with selfbuilt very large coil.

[Funfinder]

Because you need hot rocks. The meteorite signal is like hot rock signal (phase lead about 90 deg relative to TX current). However the same phase angle has GND signal from mineralized nonconductive soil.
Unfortunately, the most beautiful and expensive meteorites can not generate signal at air test.
Search the WEB for "blanket coil"!

Found this link - btw. it uses Vista RG 1000 that is also very good working machine from BG:

http://www.youtube.com/watch?v=PYr9wLqdtg4

This is from GoldDetector, Oregon. He also uses a vehicle. Some wires taped onto a blanket and connected to PI - very nice idea for such sites full of bonanza nuggets.

> (phase lead about 90 deg relative to TX current)

Well the Blisstool LTC64 and the Fisher 1266x give double beep signals in such cases - I found already mineralic stones here but those have been transported by glacier some thousand years ago. And the Jeohunter finds them even as positive (metallic) values if groundbalance is set to minus 80.

However there exist differences. Some contain enough iron and nickel so they show up in allmetalmode. btw. at those Discovery channel report these guys found very seldom crystals within the meteorites.

And last but not least very good news:
Meteorites can be found everywhere worldwide but most of them don't last very long - they oxidate, rust and dissolve very fast depending on the ground conditions.

[Funfinder]

NOT mH.
Try about 300 or 400uH
A 22 AWG would be good.

OK thanks, I will try to remember this value, it's around 1/3 mH.

[Aziz]

Die Schatzsucher: Meteoriten-Männer (german, started not long ago)
http://dokujunkies.org/dokusoapreali...-dtv-xvid.html

Watch out! Part 3 is available for our german speaking friends.

[Funfinder]

Thanx for the info - and tomorrow the next episode will come.

btw. german is just an english dialect!

house - Haus
mouse - Maus
bread - Brot
cold - kalt
old - alt
good - gut
detector - Detektor
field - Feld
run - renn'
white - weiss
red - rot
blue - blau
night - Nacht
monster - Monster
garden - Garten
wood - Wald
hot - heiss
motor - Motor
meteorite - Meteorit
metal - Metall
shovel - Schaufel
go - gehe
see - sehe
fish - Fisch
...
and much more