About a hybrid

[Riss]

What folly is this? Why don't you state the basis on which this device is working? Give some details. Otherwise how can you expect to engage in technical discussion.
https://m.youtube.com/watch?v=9S_UlE1B7ys

#26 Thank you very much for your attention !!! Sherlock Holmes is one beginner amateur compared to you! - This is my very old prototype developed 2013 year . Ordinary PI . Nothing special . It was made with old parts from the garbage - scrap . In the old parts is hidden creative inspiration … Operating frequency -1125 Hz , + (- ).TX time -110 microseconds . Then listen…The information from this video is very poor . On an amateur this video probably nothing speaks. But if done correlation processing of information on the video channel , and this from the sound of this video , any professional in this field will smile…Pay attention to inscriptions on the front panel . Please look at the behavior of the arrows . The right arrow is red . There is a correlation between the behavior of the arrows and the frequency of the tone from VCO. The video is done on my second polygon , ( test field ) - 21 year old . After a few of your comments I will dab ( thump , beat ) off the dust several videos with this prototype . I will give links . I listen to you very carefully…

[Koala]

https://www.youtube.com/watch?time_c...&v=1DWZAqXspCw

pinpointed is very stable in the highly mineralised soil. Detected in far worse here in the UK ?

[Riss]

https://www.youtube.com/watch?time_c...&v=1DWZAqXspCw

pinpointed is very stable in the highly mineralised soil. Detected in far worse here in the UK ?

Yes, in many places in Bulgaria soil is a real nightmare ! In this case from a video the soil was very dry , but it stuck to the magnet pretty strong -very strong reactive component . This is shown in the picture of the topic from this forum Thread: Real tests. This is a science ... -10-26-2018, 08:55 AM . http://www.geotech1.com/forums/showt...487#post250487
In United Kingdom the soil is very light , compared to that in Bulgaria ( average ). I know it from one manufacturer of detectors , with about 10 years of experience in soils on English territory . In the mountains of Bulgaria in many places soil and stones have a large reactive component . Agricultural soils in recent years have extremely high conductivity . This is due to the excessive use of fertilizers .
I have measured the conductivity of the soil for about 15 years . The device is very simple and inexpensive -only 2 CMOS IC. Oscillator - 40106 , works at around 100 Hz. Divider on 4 - 4013 . From the exits of the second trigger via two resistors on straight and inverse output ( 2,4 Kohm ) output signal ( 25 Hz ) goes in the soil , using two nails about 10 centimeters long . They are stuck in a wooden lath at a distance of about 20 centimeters . The nails are stuck to the end in the soil . Power supply -9 volt battery 6F22 . Measurements are made only with a new battery . The current consumption is measured . High current - greater conductivity of the soil . Measurements are made at the same soil temperature - for example 15 degrees . The conductivity of the soil strongly depends on the temperature . With the increase of temperature it increases .It's obvious -at high humidity the conductivity increases .

There is not much accuracy , but I noticed the following -conductivity is steadily rising …High conductivity causes strong false signals .
Merry Christmas to everyone in Geotech ! I wish pleasant emotions during the holidays . I wish very good health , happiness and luck through the new one 2019 year !

[Riss]

A modest test
https://www.youtube.com/watch?v=YKMosGBc2to

[WM6]

I have measured the conductivity of the soil for about 15 years .

Hi Riss

What about maximal magnetic susceptibility of typical Bulgarian soil.

Did you measure magnetic susceptibility of soil too?

[Orbit]

Hi Riss

What about maximal magnetic susceptibility of typical Bulgarian soil.

Did you measure magnetic susceptibility of soil too?

Discutable maybe measured in Serbia otherwise hybrid is just because it is probably added one specific receiver I discovered a few years ago something similar ...Golden Mask sheme input part changed !

[Riss]

Hi Riss

What about maximal magnetic susceptibility of typical Bulgarian soil.

Did you measure magnetic susceptibility of soil too?

http://www.niggg.bas.bg/wp-content/u...04/avto_dj.pdf ,,Book on Soil Magnetism by Neli Jordanova of the Bulgarian Academy of Sciences, Sofia. Amazing book dealing with applications in Pedology, Environmental Science, Agriculture, Landmine Clearance and Archaeology. ‘’
This book recommends Eric Foster . There is a wide variety of soils in BG . I do not make measurements on magnetic susceptibility of soil , but sometimes I check with a neodymium magnet .We also have soils with very large losses - 40-45% loss of depth . They create grandiose false signals , I'm more afraid of it…

[WM6]

http://www.niggg.bas.bg/wp-content/u...04/avto_dj.pdf ,,Book on Soil Magnetism by Neli Jordanova of the Bulgarian Academy of Sciences, Sofia. …

Thank you. Informative reading.