Menu
What's new
Find's Treasure Forums

Welcome to Find's Treasure Forums, Guests!

You are viewing this forums as a guest which limits you to read only status.

Only registered members may post stories, questions, classifieds, reply to other posts, contact other members using built in messaging and use many other features found on these forums.

Why not register and join us today? It's free! (We don't share your email addresses with anyone.) We keep email addresses of our users to protect them and others from bad people posting things they shouldn't.

Click here to register!

Need Support Help?

Cannot log in?, click here to have new password emailed to you

Whites PI3000 Sensitivity

A

Anonymous

Guest
Hello,
I follow my prec post with the following notes on Whites PI3000 sensitivity.
I air tested my PI3000 with some coins (euros) and a few silver,gold,copper rings and chains I found using a Whites Eagle Spectrum (very good machine) here in Italy.
The largest euro coin is the 2 Euros (worth today about 2.5 dollars) ; the PI3000 can detect it at about 10 inch while my Spectrum can go up to about 15 inch. These figures look good but gold is the real problem.
I tested a few gold rings and some (2 of them) are barely detected at coil contact!
One thin gold chain with small gold pendant and a thin silver chain are completely invisible to the PI3000.
I include a picture that shows my findings in order of detection sensitivity (right less or none detection, left maximum detection).
I'm worried I lose gold while detecting wet sand.
Did anyone test a PI3000 against other PI detectors?
Any idea?
Greethings from Italy <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Metal detectors see only one link of the gold chain.
This makes it hard to find gold chains. I have found only one gold chain in my 10 years of metal detecting and it was because there was a large pendant attached to the chain. It should be picking up gold rings though. You might want to send it in to Whites for a check up.
Good luck!
HH
Emmett
 
Luca
There have been some good discussion on invisible gold with PI's in Eric's posts below in"Detecting invisible gold". Eric and reg also had some good discussions about this in the Nuggetshooter forum.
PIs are not the only detectors that has problems with gold chains. Review "The Explorer and gold chains"(good photos) on Dec. 26 in Minelab Explorer(FBS).
George
 
Lucia,
You might have to change time delay to do better on gold.Does the PI-3000, have these IC's 555 timer,4017 or 4069 IC. What part of Italy are you in.
 
Hello,
I'm in the center of Italy. I can reach both west and east coasts. West coasts (Rome) are heavily mineralized (black sand). Garret has recently modified its Infinium Pulse LS detector to better workout our western coasts . They call it Infinium Mediterraneo but I had no chances to try it.
So a pulse detector is a must here.
As for the PI3000 , in the schematic I see that the basic 30Khz clock is divided by 10 with a CD4017 decade divider. I don't know how long is the pulse in uS, I've no idea of how to calculate it from the schema. I'm good at digital circuits but bad in analogue.
The only thing I understood is that a pulse is transmitted every 3Khz (e.g. 30Khz div 10) but since I don't know how long the pulse is, I'm not able to determine sampling timing.
I found also the PI1000 schematic and it is basically equal to the PI3000. Same TX circuit, same RX circuit (amplifiers and everyting). Differences only in the threshold and audio so stating that the PI3000 is better than the PI1000 is simply wrong.
One idea could be to make a piggyback board to replace the CD4017 with a PIC16F84 to program timings at will (or even at the push of a button) and this is easy to do for me but first of all I have to understand all the original timings ....
<img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Luca,
Sounds like you can repair the PI-3000, if you damage it.To lower time delay might be as simple as change-ing a Cap.My pi-1000 was modifyed by lowering a cap.white might have all ready made the change in your pi-3000.I need to see the print to know.If you have a Infinium PI, a WHITE XLT, Why bother with the PI-3000.Does it work OK in black sand.
I have a Garrett Infinium also,there is no black sand,only soft and hard packed beach sand where I live N-FLA East coast.to use the infinium here I have to adjust it back,low thershold, fast or slow,ground balance wont hold.Do you know what Garrett did to modify it.if they adjusted it back inside the detector,it might cut down on dept.
I have a Minelab SOV; nothing bothers it here on the beach.it dont go as deep,you dont dig all that trash.
Do you ever get down to Scily.My family came from there.my father's father had some kind of farm there,
they found Ceaser toom on his land a end of 1800.most likely Agustus Ceaser.The town has same name.You can research my name to locate home-site and land. The toom is in a out-cropeing of large rocks. use my E-Mail, fjs5015@yahoo.com
I get back to you in a fue days. Frank.
 
Hi Luca
check out your emails more frequent. I send you already to your first post (last week) in the forum how and where in the circuit to modify your detector to make it more sensitive to gold.
Chris
 
Hello,
I have only a PI3000 a Whites Spectrum and a Whithes TM600 cache locator. Alla machines were made in the '90s.
Do you know where I can find the specs of the PI1000 modification ? I could check it against PI3000 schematics.
In one word I'm just worried of sensitivity to gold because I'm able to find a lot of coins but not much gold.
I'm preferring the PI3000 just because it lets me search where most of the other won't do: on wet sand and UW.
Cheers
 
Luca,
No, I use public libary for my E-Mails.cannot send any copys from here, only receave.I need to see PI-3000 print and compare it to mine.off-hand I say that the 4069 is timer,if it has one.if not look for a 555 for main timer, also a 555 IC for audio.if it has sound.Does it have a viberator in head set.
How is 3000 on pin-pointing.can you find a small target without digging a (Fox) hole.
Frank.
 
Hello,
the PI3000 has a Clock generator made out of a CD4069 and a Clock divider (by ten) CD4017 to drive all the functions.
My opinion is that the PI3000 works really well on wet sand ; I've been able to retrieve an impressive quantity of coins, a watch and a silver ring,in a 3 days beach search last week. The only point here is to find ways to improve sensitivity to small gold. Pinpointing is good. I use always a scoop, since you can always find rusted nails to cut your fingers....
Here is a picture...
 
</span>goldquest bastardisation<span style="background-color:#ffff00;">.....came across an old gq and am halfway through waterproofing it,my intention being, to use it in the med (thinking i might gain a depth advantage on a surfmaster).Is there anyone out there that can help me with this procedure; are there any physical component adjustments that need altering?..how can i increase the depth of this device?..any help is greatly appreciated.</span>
 
Ted,
You should realize a good depth advantage over the Surfmaster without doing anything. Most importaint it
 
You must log in or register to reply here.
Top