Polish Pi

[kt315]

Lucas is on my friend List from Facebook, maybe he has old archives saved and can provide it as file container

yes yes, we are all waiting Lucas. (why i send files instead he has to do?)

[Andi68]

I'm waiting for better times

[kt315]

Lucas continues.

[surfdetector]

hi surfdetector,
i checked the postal pricing list from DHL
maybe i can send you a pcb as letter for 3,70?
send me your adress via p.m.

i use a chinese lf357, but it is one of the best clones i had from aliexpress
i use same type in felezjoo


https://www.youtube.com/watch?v=qU1bF0atZDA

PM sent. Thanks.

[kt315]

LDG stop spam in all threads. i see you a hottest guy because you are living under hot sun but not BE SO ASIATICS EGOISTIC
to spread one message in all threads.

[Mr.Jaick]

hello everybody
i build my polones pi and i found out something interesting
i constructed two coils for it , a 30cm (0.5mm enameled , 21 turns) and a 60cm (0.5mm enameled , 13 turns) circular
the interesting thing is, it almost does not detect gold
in order to detect a gold ring i need to put the ring on the 30cm coil , is that normal for a PI metal detector ??
how can i fix this?
and it detects a big heavy iron plate (60cm diameter) 1.5m under ground with 60cm coil(barely)
can i do something to get more depth with these coils?
cuz i heard and read some people claim that polones can detect up to 3 or even 4 meters!
is that really possible?? (without a 1.4m square coil)

thank you guys.

[kt315]

now your thema would be FASTEST COIL and BACKET COIL.
this is second stage in your learning of PI methodics.
third thema will be TWO STAGE PREAMPLIFIER/FRONT END AND ERIC'S MAGIC 5US FIRST DELAY.

do it.

[Mr.Jaick]

now your thema would be FASTEST COIL and BACKET COIL.
this is second stage in your learning of PI methodics.
third thema will be TWO STAGE PREAMPLIFIER/FRONT END AND ERIC'S MAGIC 5US FIRST DELAY.

do it.

hello sir , thank you for your respond
but i didn't quite get it
do you mean i need to build another pi with two stage pre_amp ...?
BACKET COIL?
thema?

[sbalio1]

Yes, it can reach 3 meters
You can change the damping resistance to 470R or 600R to improve the sensitivity of gold to small sizes
coil 40 cm Detects the gold ring at 70 cm.
coil 65 cm Detect the piece of iron 30 * 35 by 2.10 meter
The problem with the device is the balance of the coil, while lifting the coil 20 cm from the ground loses its sensitivity, which must be reset the parameters

[Mr.Jaick]

Yes, it can reach 3 meters
You can change the damping resistance to 470R or 600R to improve the sensitivity of gold to small sizes
coil 40 cm Detects the gold ring at 70 cm.
coil 65 cm Detect the piece of iron 30 * 35 by 2.10 meter
The problem with the device is the balance of the coil, while lifting the coil 20 cm from the ground loses its sensitivity, which must be reset the parameters

do you refer to R8 as damping resistor?

i used R8 = 680 and R9 = 390 in my circuit
the mistake i made was using 0.5mm wire for coils, I should've use 0.75mm or higher
but your experience for depth is crazy , i love to make that happen
thank you

[sbalio1]

For small gold, the best wires are the least thick
Maybe your problem in some electronic parts such as bf245a(b*c) ... lf357


coil27cm small gold
https://www.youtube.com/watch?v=wWhOMBjqe7I

coil 32*37cm gold
https://www.youtube.com/watch?v=U_Xsg1nBsFQ

coil 65cm detects 2.10 cm for a size of 30 * 35
https://www.youtube.com/watch?v=ay6jltpWRao

[Qiaozhi]

For small gold ...

I've noticed this in a few videos recently, where people are boasting about how far away their detector can detect small gold, but the "small gold" being referred to is a gold ring. This is a very misleading test, as eddy current response is enhanced by the ring-shape of the target.

[dbanner]

If a man's gold ring under test is considered "small gold" then I must have missed something.

A typical 14K gold ring is an alloy (58%) which may contain other metals such as zinc, nickel, silver and copper. Not to mention the ring shape itself is particularly favorable to eddy current response.

Try waving a 1 gram gold nugget across the "polish pi" coil. I'll bet you nobody's at home.

[waltr]

I've noticed this in a few videos recently, where people are boasting about how far away their detector can detect small gold, but the "small gold" being referred to is a gold ring. This is a very misleading test, as eddy current response is enhanced by the ring-shape of the target.

Exactly. My gold, 14k, wedding band typically gives the largest signal and greatest distance of any of my test targets.

Lead shot used in shotgun shells is a better equivalent of 'small gold'.

[sbalio1]

In a previous article, he talked about a gold ring. This is what I referred to in my talk about little gold. It only takes a little sedition to understand this intention. How can there be an ostentation then we see a video. In the big treasure A gold ring considered as little gold.
The problem is in Google Translate. What is meant by the ring and the bracelet? Not the same words in translation

pi polones Not for raw gold or for finding small gold coins. Without wasting your time, it is not with this device. On the contrary, this device can be improved to work on large and medium sizes of metals .with coils of size 60cm and 1m and 1.5m
That's what we asked him, Mr. Jaick. and I answered him in this context