ETI 1500

[Erwin]

I have been built this but has some problem. The beep from speaker is not appear, the meter is not sensitive and critical problem is the search coil. I don't know this coil type, but I have try coplanar and it good work(150 mm from the center of coil). Does any one have built ETI 1500 ? Please, I need your information!
Thank's Your Attention.
Best Regards.

Erwin

[Gary]

Re: ETI 1500

Can you post the schematic?

[Erwin]

Re: ETI 1500

Hi, Gary. I think you can download it in this site(Metal Detector/Projects/Induction Balance/ETI1500.300dpi). Remember, you must be choose ETI1500.300dpi file to download it(not ETI1500.150dpi). Because the pcb is not shown in ETI1500.150dpi pdf file. If build it correctly and know the search coil, you will detect gold.

Thank's
Best Regards

Erwin

[kt315]

Re: ETI 1500

ETI-1500 is ABSOLIUTELY similar to Shadow project.
anyway, you can use a Magnum coil building description as these is one IB principle.

regards

[geo]

Re: ETI 1500

Hi Erwin. I had build ETI 1500 before 20 years.It is a very good project without problems.As i remember i used a DD coil with good results.The only problem who i had was bad connections with the rotary switch.As i remember the sensitivity was about 25cm for a coin.Look again your project for your problems.
Good Luck
Geo

[Erwin]

Re: ETI 1500

Ok, i will check again mine.
Thank's Geo