Treasure Hunting & Metal Detecting Community

Welcome, Guest! Please login or register HERE - It is FREE and easy. Only registered users can post and view images on our message boards. Did you miss your activation email?
Login with email, password and session length Caps lock is activated.		Or Login Using Social Network Account

News:

It appears you have not registered with our community yet. Guests can not uses all functions of the forum. They can not post, view attachements or access our download areas etc. To register please click here ...

Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Miscellaneous > Chit Chat & Everything Else >

PI Vs VLF Air Tests

Pages: 1 2 3 4 5 6 7 Go Down

← previous next →

Tags:

0 Members and 1 Guest are viewing this topic.

Ridge Runner Topic starter

Mod
Platin Member

Join Date: Jul, 2010

313

Activity

Posts: 7433
Referrals: 0

27450.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Mozilla compatible

	Re: PI Vs VLF Air Tests « Reply #30 on: August 13, 2015, 11:26:36 am »

	Quote:	Posted by GoldDigger1950
Well, FYI, I used a chain style key chain reel. I took out the chain (which hangs unless you pull it exactly straight out) and put nylon parachute cord in its place. A few experiments to see about the right length and Bob's your uncle. Now, as long as I don't get any taller . . .

Thanks for that, That's a great Idea, I will do A search for A reel that will fill the need,

Taller No, Wider Yes,

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300127.html#msg300127


	Logged

GoldDigger1950

The Old Man and the Soil
Global Moderator
Platin Member

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009

225

Activity

Posts: 11219
Referrals: 12

47848.00 Gold
View Inventory

	Windows NT 10.0
	Firefox 39.0

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors

	Re: PI Vs VLF Air Tests « Reply #31 on: August 13, 2015, 11:36:04 am »

I picked that reel for the holding strength. It won't retract the scoop but it will hold it in place. You still have to lift the scoop and swing it around back. Once there, it stays. I played with a large magnet but since I couldn't see it, I would occasionally let the scoop click on it too hard and break the magnet. Went through a half dozen that way before I tried the reel.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300128.html#msg300128


	Logged

It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.

Let's Talk Treasure!

Ridge Runner Topic starter

Mod
Platin Member

Join Date: Jul, 2010

313

Activity

Posts: 7433
Referrals: 0

27450.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Mozilla compatible

	Re: PI Vs VLF Air Tests « Reply #32 on: August 13, 2015, 11:48:46 am »

	Quote:	Posted by GoldDigger1950
I picked that reel for the holding strength. It won't retract the scoop but it will hold it in place. You still have to lift the scoop and swing it around back. Once there, it stays. I played with a large magnet but since I couldn't see it, I would occasionally let the scoop click on it too hard and break the magnet. Went through a half dozen that way before I tried the reel.

Something like that would be A God Send, I have tried tool belt Hammer Loops, and I stuck the point in my back, I tried dragging it on string and it kept getting caught up or the String Snapped every second Trip, Once I even dented my Head ( that Hurt) Violent

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300129.html#msg300129


	Logged

GoldDigger1950

The Old Man and the Soil
Global Moderator
Platin Member

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009

225

Activity

Posts: 11219
Referrals: 12

47848.00 Gold
View Inventory

	Windows NT 10.0
	Firefox 39.0

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors

	Re: PI Vs VLF Air Tests « Reply #33 on: August 13, 2015, 11:51:54 am »

We could go wild and look like the Clampett's truck on the Beverly Hillbillies. Clanking and banging around. People would be scared to approach us.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300130.html#msg300130


	Logged

It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.

Let's Talk Treasure!

Ridge Runner Topic starter

Mod
Platin Member

Join Date: Jul, 2010

313

Activity

Posts: 7433
Referrals: 0

27450.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Mozilla compatible

	Re: PI Vs VLF Air Tests « Reply #34 on: August 13, 2015, 12:03:54 pm »

	Quote:	Posted by GoldDigger1950
We could go wild and look like the Clampett's truck on the Beverly Hillbillies. Clanking and banging around. People would be scared to approach us.

I usually stop and talk to the senior Citizens who walk by and give them the Item I have just dug up if not I give them an old Coin from yester year that I may of found that day and they always come to chat when ever we happen to meet, So I think the loud Approach might cost me some Nice conversations and worry people,

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300131.html#msg300131


	Logged

xavier

Platin Member

From a rainy Brussels
Join Date: May, 2009

166

Activity

Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Chrome 44.0.2403.130

	Re: PI Vs VLF Air Tests « Reply #35 on: August 13, 2015, 12:04:35 pm »

RR you were asking about why does a PI detector have problems when in the wet? well the way that I figure it out is because frequency travels a lot faster in water (about 4* faster than in air), this would cause the off time of the coil to be too slow and causing the detector to detect it's own magnetic field instead of the eddy currents.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300132.html#msg300132

Xavier


	Logged

So many questions so little time

Homefire

Global Moderator
Platin Member

Join Date: Jan, 2009

662

Activity

Posts: 15906
Referrals: 0

52360.00 Gold
View Inventory

	Windows NT 6.3
	Firefox 39.0

	Re: PI Vs VLF Air Tests « Reply #36 on: August 13, 2015, 12:06:18 pm »

I need Granny and the Double Barrel shot gun watching over me down here on the Border.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300133.html#msg300133


	Logged

Ridge Runner Topic starter

Mod
Platin Member

Join Date: Jul, 2010

313

Activity

Posts: 7433
Referrals: 0

27450.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Mozilla compatible

	Re: PI Vs VLF Air Tests « Reply #37 on: August 13, 2015, 12:09:58 pm »

	Quote:	Posted by xavier
RR you were asking about why does a PI detector have problems when in the wet? well the way that I figure it out is because frequency travels a lot faster in water (about 4* faster than in air), this would cause the off time of the coil to be too slow and causing the detector to detect it's own magnetic field instead of the eddy currents.

Well that makes sense, So it is A Form of feed back Then Yes??

Posted on: August 13, 2015, 12:08:02 pm

	Quote:	Posted by homefire
I need Granny and the Double Barrel shot gun watching over me down here on the Border.

She caused enough trouble in Beverly Hills heaven knows what she will do in NM,

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300135.html#msg300135


	Logged

xavier

Platin Member

From a rainy Brussels
Join Date: May, 2009

166

Activity

Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory

	Windows 7/Server 2008 R2
	Chrome 44.0.2403.130

	Re: PI Vs VLF Air Tests « Reply #38 on: August 13, 2015, 12:15:50 pm »

Yes, when building a PI detector we always try and make the off time as short as possible to get a better detection depth, they all have a power POT (as far as I know) that are used for the prevention of bounce in rocky or very hard soil (frequency will travel faster on hard soil than in sandy soil) so by reducing the power you will get round the off time being too slow.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300136.html#msg300136

Xavier


	Logged

So many questions so little time

Homefire

Global Moderator
Platin Member

Join Date: Jan, 2009

662

Activity

Posts: 15906
Referrals: 0

52360.00 Gold
View Inventory

	Windows NT 6.3
	Firefox 39.0

	Re: PI Vs VLF Air Tests « Reply #39 on: August 13, 2015, 12:21:24 pm »

X, I'm not so sure Radio or EMF follows that rule of Faster in water. Different Animals then Audio Air or Vibrations. If EMF does it's not that much different.

Posted on: August 13, 2015, 12:17:50 pm

Good thing about Granny was she always had Jug of her Rumitise Medicine.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,60736.msg300138.html#msg300138


	Logged

Pages: 1 2 3 4 5 6 7 Go Up

← previous next →

Jump to: