IGSL

[6666]

Hello Ivconic, I am trying to help out a fellow who made your IGSL from your schematic and board layout from post #2
as there are 90 pages in this thread which is over whelming ,I guess there were some changes made
would you have a working schematic and board layout available ? thanks

[Qiaozhi]

My concern is that the the different connection to the coil might have an impact to te nulling of the coil and other adjustments. I have recognized that the noise is good now,but I cannot adjust the GEB with a ferrite any longer. I need to make further measurements to see what impact the new connection has.
best regards,

Didier

If you cannot adjust the GEB, then it is due to your coil balancing. It is more important to get the RX phase offset correct than to achieve the deepest possible null. This has been discussed many times in the forum.

[didier]

My concern is that the the different connection to the coil might have an impact to te nulling of the coil and other adjustments. I have recognized that the noise is good now,but I cannot adjust the GEB with a ferrite any longer. I need to make further measurements to see what impact the new connection has.
best regards,

Didier

[Qiaozhi]

is there a loss sensitivity?

Compared to what?

[didier]

thanks a lot for your feedback on this. at least I found the failure I am dealing with since a long time. I have a self made Musketeer coil, encapsulated with Epoxy. when I connect the RX pin 2 of U1 to ground, connecting shield of coax 1 and 2, do you think there is a negative impact to the performance of the coil? is there a loss sensitivity?

[dbanner]

definitely true. Wrong connections.

[ivconic]

...The instability you're experiencing definitely sounds likes a shielding issue.

101%

[Qiaozhi]

Hi, I need technical help please. I built the IGSL Musketeer back in 2013. I have built the Redox version from Davour. However I gave up since it did never worked as expected. On the table everything worked as expected, the discrimination was ok. But when I assembled everything in a metal housing it was rather unstable, when I walked it made much noise. also ground balance was very sensitive.
Some weeks a ago I decided to continue to search for the cause of this instabilities because I want to go for treasure hunting. I have only a self made Baracuda detector but it is not acceptable since it has no discrimination, which is a bit frustrating...
so I checke the schematic again, but I could not find any failures. I shielded the GEB poti, replaced it by a trimmer, grounded the housing, but it is not getting better.
but now I think I found something, which might be not correct. I used 2 seperate coax cables for the TX and RX. For the TX I connected shield to ground.
But how to connect the 2nd coax cable to RX? I cannot connect the shield from RX to ground.
what is also strange, when I touch the coax cable of the dedector, it is very sensitive and gives a signal....
please let me know what I can do to fix this issue.

Didier[ATTACH]50507[/ATTACH]

The coil wiring is the same as the Tesoro Golden Sabre / Bandido, etc. That is, the TX and RX share a common ground that is connected to the shield inside the coil shell.
If your coil is handmade, then you can make the missing link between the two shields in the coil shell, and connect the RX shield to the RX connector pin1.
If you're using a Musketeer coil, I suspect the link in the coils shell does not exist. In this case your only option is to connect the RX shield to the RX connector pin1, and short the TX and RX shields together at the coil plug.

The instability you're experiencing definitely sounds likes a shielding issue.

[didier]

Hi, I need technical help please. I built the IGSL Musketeer back in 2013. I have built the Redox version from Davour. However I gave up since it did never worked as expected. On the table everything worked as expected, the discrimination was ok. But when I assembled everything in a metal housing it was rather unstable, when I walked it made much noise. also ground balance was very sensitive.
Some weeks a ago I decided to continue to search for the cause of this instabilities because I want to go for treasure hunting. I have only a self made Baracuda detector but it is not acceptable since it has no discrimination, which is a bit frustrating...
so I checke the schematic again, but I could not find any failures. I shielded the GEB poti, replaced it by a trimmer, grounded the housing, but it is not getting better.
but now I think I found something, which might be not correct. I used 2 seperate coax cables for the TX and RX. For the TX I connected shield to ground.
But how to connect the 2nd coax cable to RX? I cannot connect the shield from RX to ground.
what is also strange, when I touch the coax cable of the dedector, it is very sensitive and gives a signal....
please let me know what I can do to fix this issue.

Didier

[dbanner]

Download Android Gerber viewer pro. It's great for viewing Gerber files on Android tablet or phone. Up to six layers.https://ulozto.net/file-tracking/555...+gerber+viewer

[Artyom]

Nikko10. Tell me how you do the screening of coils and housing. thanks

[mschmahl]

I have no problems with open it. All is working. I use winrar.

[nikko10]

Checked, an archive was opened without problems.There is a file of LAY in an archive

[Akhnoth]

Hello,
just to tell that the Gerb.Musket.ispr.final.rar doesn't open correctly.
Have you same issues when opening this file ?

Thanks

[nikko10]

A bit corrected the pay of Мушкетера-Gerb.Musket.ispr.final.rar