Anyone made the ETI549 (Australian version)

[cristiano.sar]

Hello,

I'm new to this forum.
I'm from Portugal, living actually in Brazil and I ever wanted to build my own metal detector. I have build one in the past (about 8 years ago), but it was a BFO type and was more an experiment than a tool.
I'm interested in build the ETI549 (Australian version - https://www.geotech1.com/cgi-bin/pag...49au/index.dat), I already bought most of the components but I want to see if anyone has already built this project just to have some ideas of the detector performance and tips of the construction.

Thanks!
Best regards,
Cristiano

[Altra]

Hello,

I'm new to this forum.
I'm from Portugal, living actually in Brazil and I ever wanted to build my own metal detector. I have build one in the past (about 8 years ago), but it was a BFO type and was more an experiment than a tool.
I'm interested in build the ETI549 (Australian version - https://www.geotech1.com/cgi-bin/pag...49au/index.dat), I already bought most of the components but I want to see if anyone has already built this project just to have some ideas of the detector performance and tips of the construction.

Thanks!
Best regards,
Cristiano

Hello Cristiano,

The project you have chosen will likely disappoint you in actual use. You will dig lots of trash and iron, it will also detect the ground minerals. The design is 40 years old now. There are newer and better designs to build here on Geotech. See the link below for the TGSL which can eliminate iron and trash and is a great project with lots of information. The ETI549 may be fun to build and experiment with, but not good tool for finding valuables. I guess it depends on your electronic skills and what you want to do with it when complete?

Detailed information
https://www.geotech1.com/forums/show...mplete-Details

Forum
https://www.geotech1.com/forums/foru...e-Bandido-TGSL

[6666]

The ETI projects were notorious for at least one mistake, here is a list of the mags, it may pay to check the errata
it was published in MAY 1977
https://worldradiohistory.com/ETI_Magazine-AU.htm

[cristiano.sar]

Thanks for the advice, I will take a look at this "TSGL"!

[cristiano.sar]

I have not started the build of my detector yet. I'm just in doubt with so many available options. For now, I'm considering 2 projects, the TGSL (VLF) or the Felezjoo (PI), do you have any opinion of what would the be the best to find small / medium gold nuggets?

Thanks!

[waltr]

I have not started the build of my detector yet. I'm just in doubt with so many available options. For now, I'm considering 2 projects, the TGSL (VLF) or the Felezjoo (PI), do you have any opinion of what would the be the best to find small / medium gold nuggets?

Thanks!

I have built and use the TGSL. It is quite sensitive to small brass objects, lower conductivity, and should do well with natural gold.
If this is the first detector you are building then the TGSL is a good one since many of us have built it and there is lots of info on getting it working here on Geotech.
It has a fixed GB adjustment that works well in the mild soils where I detect. Didn't know Where you are in the world or how mineralized your soil is.
If you are in Australia then not sure if the TGSL's GB will work.

[cristiano.sar]

I have built and use the TGSL. It is quite sensitive to small brass objects, lower conductivity, and should do well with natural gold.
If this is the first detector you are building then the TGSL is a good one since many of us have built it and there is lots of info on getting it working here on Geotech.
It has a fixed GB adjustment that works well in the mild soils where I detect. Didn't know Where you are in the world or how mineralized your soil is.
If you are in Australia then not sure if the TGSL's GB will work.

Thanks for the help. I'm in Brazil and really I don't have much experience with the soil but I think it is mineralized because it usually has a orange like color (like clay)