Pinpointers TOPIC

[Max]

You can see detection here. Few people note the sensitivity of this.

https://www.geotech1.com/thuntings/s...ad.php?t=14041

Hi,
right, some will not notice that...so I explain why it's important notice it instead...from pictures I see it's really good pinpointer... good detection on small stuff, large on big steel target: that's the way to avoid missing the good stuff.

In some situations is really important having some extra depth of detection.

In normal pinpointing operations one will find the target (elusive) in the removed soil... passing the ferrite horizontal to the soil till find the area with target, then rising up 90° the ferrite so using just the tip of it to center the hot spot.

But often is not that easy... the above happens mostly with shallow targets and well centered holes... in other cases the obejct is deeper and centering with main MD is more complicated, so it's easy that the hole is not well aligned on target: that's situations where an extra depth will solve fast and easy.

Instead of removing much soil... and being crazy if the obejct is on sides/walls one just use the pinpointer... like the Skil... and find his way to the target. Save time, save work, SAVE THE ITEM too... cause I see and dug myself broken stuff cause of eccessive force applied in excavation and bad centering...

That's why the extra depth is always a plus on pinpointers...that will take you out of troubles in critical moments... and I think the above is one of these.

Kind regards,
Max

[Esteban]

You can see detection here. Few people note the sensitivity of this.

https://www.geotech1.com/thuntings/showthread.php?t=14041

[Steve in MS]

Hey Max, I also have the Uniprobe (PI) which has excellent depth but the weight of the headphones is not agreeable to me plus sometimes it would have interference problems for no known reason and it is expensive. I think they made it too hot, just on the verge of stability. I used it for about a year but went back to my Whites 120 which I have had some 8 years or so. I have had to replace the switch on it several times but it still works, it only gets average depth of pinpointers.
Regards,
Steve

[Max]

i made my pinpointer out of this thing

preety good sensivity 2 - 3 cm, but deam this thing is huge
i attached small vibrator from mobile phone directly to the speaker and installed switch, also made push button trigger

Hi,
I like it... stud detectors are good for that... I made also one, but it's "lost" ...I mean I borrow it to a friend...and never come back!

My was smaller and yellow thing... but detection was never up 1+1/2''... good but not as good with smaller stuff.

Kind regards,
Max

[thcruil]

i made my pinpointer out of this thing

preety good sensivity 2 - 3 cm, but deam this thing is huge
i attached small vibrator from mobile phone directly to the speaker and installed switch, also made push button trigger

[Max]

Hi Max

Good handmade pinpointer! As I told you I'm thinking seriously for to find gold nuggets... Yes, for the simplicity is good!

Hi Esteban,
for depth pinpointer what about the schematic you posted (somewhere) that has 2 ferrites ? I mean the one with 3 npn transistors, 2N3903.

Did you try it ? I made in a hurry but mine doesn't detect at far... just an hammer at 2cm for now... but I used a single ferrite and wound a messy coil in a hurry...I get anyway a very sharp needle response in that short range.

Any details about coils for it ?

Kind regards,
Max

[Esteban]

Hi Esteban,
I think it's good for these small things: I have a small gold nugget of about 3mm diameter and it detects that at 5-6mm if good tuned.

I think it will be very nice for nugget hunting where a big coil is sure unuseful on that small , elusive targets... expecially if the coil is DD: the pinpointing is difficault and the wide area coverage doesn't help locating the small nugget in the e.g. sand.

I think the circuit could be optimized and power increased a bit but maybe one will gain just few mm more on such small targets.

Anyway, for the scope it's intended, though so simple, I think is very good.

Kind regards,
Max

Hi Max

Good handmade pinpointer! As I told you I'm thinking seriously for to find gold nuggets... Yes, for the simplicity is good!

[Max]

Max, speaking of getting more depth out of a pinpointer, what would happen if a bigger coil could be made for one, say about 1" in diameter, would that cause any gain on depth? I have a Sherlock pinpointer, just wondering if a larger coil would help.
Regards,
Steve

Hi Steve,
these that use the ferrite rods need ferrite to wind coil on... otherwise they work weak or don't work at all.

In PI kind, instead, a larger coil will be a real benefit and the gain in depth could be consistent, many cms I think.

I made other schematics based on Q-variance and can say that some are good for the use of larger air coils... like 5-6cm diameter... they could detect stuff easy at 12-13cm too, and don't require ferrite in these cases.

The problem is that some are really unstable circuits... you need constant retuning each time you switch them on... so are not so good.

I belive that a good , small PI would be really helpful in such situations... but so far, apart small SMD HH example by KT315, I didn't see any good schematic of those.

Kind regards,
Max

[Steve in MS]

Max, speaking of getting more depth out of a pinpointer, what would happen if a bigger coil could be made for one, say about 1" in diameter, would that cause any gain on depth? I have a Sherlock pinpointer, just wondering if a larger coil would help.
Regards,
Steve

[Max]

Wow! I missed that?
Your "crappy" pinpointer looks much better than you presented it!
You are modest Max. That is a very nice handmade! Congratulations!
Pretty handy and pretty nice.
Cheers!

Hi,
thanks... I made using just trash... things recovered from old projects... old stuff apart a new 9V battery inside, all is made of old junk from here and there.

Then I painted it all-black... just to remind me it's something useful... not something to trash from bench!

I'm really interested in farther pinpointing too... must find some good schematic.

A friend that uses DP asked me to search for a good one... cause, you know, sometimes you dig large holes (say "wells") cause of that deep detection and recovering / pinpointing the target is not easy... often is on well's borders/walls and must dig laterally... waste of time... expecially when cannot pinpoint with a common md.

This happens sometimes also with normal MDs and single small items: on the walls... and often an easy pinpointer like this I made is not enough...

There a good pinpointer like the Skil will be really useful... but also some good schematic could be enough I think.

I will look for it... but if someone has some good idea... please post here.

Kind regards,
Max

[Max]

I'm thinking seriously use it for to find in small streams this category of nuggets (in the pic small Peruvian silver nugget).

Hi Esteban,
I think it's good for these small things: I have a small gold nugget of about 3mm diameter and it detects that at 5-6mm if good tuned.

I think it will be very nice for nugget hunting where a big coil is sure unuseful on that small , elusive targets... expecially if the coil is DD: the pinpointing is difficault and the wide area coverage doesn't help locating the small nugget in the e.g. sand.

I think the circuit could be optimized and power increased a bit but maybe one will gain just few mm more on such small targets.

Anyway, for the scope it's intended, though so simple, I think is very good.

Kind regards,
Max

[Esteban]

I'm thinking seriously use it for to find in small streams this category of nuggets (in the pic small Peruvian silver nugget).

[ivconic]

http://www.youtube.com/watch?v=2sb87UZjV64&feature=related

[ivconic]

here it is...

the crappy pinpointer !

All made of junk...

Kind regards,
Max

Wow! I missed that?
Your "crappy" pinpointer looks much better than you presented it!
You are modest Max. That is a very nice handmade! Congratulations!
Pretty handy and pretty nice.
Cheers!

[kt315]

all info here also is not mine! please be more forgiving to all people whom give you the information! do not spam and flood attack them with your full ignorаnce I ASK YOU AGAIN!!!

also I ask again the forum moderator unsubscribe Roberts!!! PLEASE GIVE HIM A WAY OUT!

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