Andy Flind MFD.

[Geo]

Connect a switch to power supply of LM3915 and check what its better, with or without it.

[abdou2014]

hi, i want to know from the designers of ANDY flind on the results i got with my new preamp,

spark 1.5 V battery 1.5 Meters, small screwdriver when moving 1 Meter, small magnet 1

Meter, and this with 16 cm coil or with 5 cm ferrite .

what amazed me is that at first, if I connected a coil with large inductance I only detect

ferrous metals and magnet them without sparks, but now I detect all with small inductance

coil .

[GOLDEN LILLY]

Hi abdou. What pre amp did you use? Did you use the pre amp of pdk?

[abdou2014]

Not PDK preamp , it's ma own designe

[abdou2014]

I tried my lrl outside, it gives some false signal from time to time , I don't like that ,

I change the preamp and the coil, I replace the coil with a loop like DCH85 one turn .

It is very interesting, better of the DCH with or without TDA because I made all the versions

I do not intend to add a stimulator because the sensitivity is very high

my DCH 85 version detected a spark lighter from 1 meter, and did not react to the hand near

the antenna , I have 3 meter with this configuration and detect the precious metals at 6 cm

[humhum]

Preamlifier

High İmpedance Preamplifier , first stage was may be from Dear Maister FrancoItaly

[abdou2014]

No , I modified a very sensitive storm detector as preamp

[humhum]

This post general Sch was idea for All friend which need High impedance sensitive preamplifier , not for .....

[abdou2014]

new improvement, reacts to the hand and an aluminum plate 40cm x 40cm from 80cm ,

without stimulator, I believe this lrl is better than Alonzo pd

[abdou2014]

good evening everyone, I succeeded in making a gradiometer sensor, like the FGM or FLC, I noticed that in the ANDY 1 and 2 magnetometer circuit that there is only a display for a single polarity, I need of a circuit which has a reading of both north and south polarity, so that I can do the difference between ferrous metals and cavity , thanks.

[Geo]

new improvement, reacts to the hand and an aluminum plate 40cm x 40cm from 80cm ,

without stimulator, I believe this lrl is better than Alonzo pd

So you wait to detect a gold coin from 80cm or 8m.....

[humhum]

So you wait to detect a gold coin from 80cm or 8m.....

Yes Master Geo , You are Right that only high Sensibility not is enough for catch
phenomenon signal , need ...........

[Geo]

Really i can't understand why many members here show how their detector detects an object from 0.1 ... 1m. This is a job for a normal metal detector not for lrl.

[humhum]

Really i can't understand why many members here show how their detector detects an object from 0.1 ... 1m. This is a job for a normal metal detector not for lrl.

They will learn over time, it takes a lot of experimentation to get the full result for
meter or Km .

[Nicolas]

They will learn over time, it takes a lot of experimentation to get the full result for
meter or Km .

km