IGSL

[Davor]

I use bd650 * bdx54c * bc637
In place bd140

BC637 is a NPN transistor, and BD650 is a darlington. Both are wrong choices to replace BD140.
Please put a photo on. There are many people with keen eye for electronic detail on this forum

[Davor]

?Yes in my country its very soil contains mineralised and volcanic rock and isgl I am very sensitive to soil and rocks and how to disappear right out of the ground signal thanks davor for your answer

It is ground balance, or GB for short. Al foil has nothing to do with eliminating ground. You have a pair of trim pots on your board for that purpose. Ivconic wanted to use those separately so that Fe channel indicates a bit of ground, and once tuned properly - just let them be. It would work fine in European inland boring soils. But in your case it will not be possible. You'll have to use a front panel potentiometer for GB instead. I think the best way to do GB on IGSL is to join GB for both Fe and Non-Fe channels. Minimum changes on your board will be necessary if you apply my mod, as follows:

[medj]

I do not understand why you want to Eric any type of image
I'm the device does not work
I use bd650 * bdx54c * bc637
In place bd140
With some of the changes shown in the picture
Power connector to all the points
Scheme, which she created is this

http://im41.gulfup.com/pKTvQ.jpg

[liekwang]

?Yes in my country its very soil contains mineralised and volcanic rock and isgl I am very sensitive to soil and rocks and how to disappear right out of the ground signal thanks davor for your answer

[liekwang]

? I have not been able to eliminate the signal from a test to a rock and do not understand what the settings should be for potentiometer coil musketer I wear protective AL foil ..??

[Davor]

You need to learn how to tune ground balance. I guess you are Indonesian living on some volcanic island with highly mineralised soil.
Maybe your best option will be joining GB together as in my mods, and put a potentiometer on the front plate.
1. you must find a position on your GB potentiometer that does not produce sound but maybe only clicking when you wave a piece of ferrite in front of your coil. Mark that position as "ferrite".
2. by waving a coil up-down, not left-right, find a position on a GB potentiometer that silences your device. Mark that position for future reference.

Now your device does not sense most of the rocks.

[liekwang]

?Hi how to eliminate carany davor tone from stone test because the stone is also sensitive to

[liekwang]

?Davor why every x I touch there is sound speaker coil cabel false signals how to setting GB

[Davor]

Medj, your loudspeaker seem to be a piezo buzzer. Does it buzz when you connect it to a battery, or it just clicks? Either way you can't get any meaningful output with a self-oscillating buzzer (that buzzes by itself), and you'll need to put a 33ohm resistor in parallel with a non-buzzing transducer, because in a circuit a piezo crystal acts as a capacitor, and you need some current to enable BD140 to work. Otherwise it is constantly saturated and nothing happens.

[Davor]

Medj, please make a photo of your board. I can't see any detail in your video.

[Davor]

davor is this true positive and negative pole position

Yes, 1000uF capacitor is reversed, that's the only mistake on Petravka board.

[medj]

Thank you
But I see it's the same scheme, which created
Where some increases to see scheme

http://im41.gulfup.com/pKTvQ.jpg



skayep ** medjmedj45

[liekwang]

after I turn the pole position and 0 volts at 7808 ic pin 2 ground and I wear bipolar capacitor according scema not sensitive coil can reach 30cm to test coin

[liekwang]

davor is this true positive and negative pole position

[medj]

Please help the device does not function
This link vidio in the form of WinRAR

http://www.gulfup.com/?emCg6x

or

http://www.4shared.com/rar/5_p-hOuj/proplem_igsl_.html