ETI 1500 COIL

[wejan]

HI ALL
HOW I MAKE SEARCH COIL FOR ETI 1500 METAL DETECTOR.
THANKS ALREADY..

[wejan]

HELP ME PLEASE(COIL)

HELP ME PLEASE....

HOW I MAKE COIL, AT THIS SCHEME.( FOR ETI PROJECT 1500)
(VLF/TR MODE). WHICH COIL TYPE MUST I USE.

[salih]

ETI 1500 COIL

Rx: 50 ohms Tx: 12 ohms ,I think The form of coil same like MAGNUM
METAL LOCATOR

[makkawi561]

hi salih
I'm trying to build eti 1500 , but I have some problems with connection of SW1 and SW2

[6666]

It is one of the more complex detector projects that has been published, and includes a VLF ground-canceling mode, and a TR-discriminate mode.
The coil info seems to be missing
http://www.geotech1.com/pages/metdet...ti1500_300.pdf


The switch connections are easy
the drawing shows the physical
or mechanical operation and has 3 banks of contacts
and 4 positions
as you rotate the switch
the next contact will make, its an oak switch

[makkawi561]

thanks...,I got your point, that was very helpful,now I can go forward.
is this detector capable to find gold ?

[mikebg]

thanks...,I got your point, that was very helpful,now I can go forward.
is this detector capable to find gold ?

According Russian collegues, the ETI project 1500 operates well with Magnum coil and can detect gold nuggets because operating frequency is enough high (15 - 20 kHz).
http://www.ebooks-bg.net/sites/mitko...OJECT_1500.rar

[makkawi561]

I hope so ,thanks alot

[ironcoil]

hi guys,

does anybody know what kind of transistors are used in the IC1 and IC2?
The number 4007 didn't help me very much...

best regards

[Silver Dollar]

The 4007 is a special FET chip;
http://en.wikibooks.org/wiki/Practic...ronics/IC/4007

Datasheet;
http://cva.stanford.edu/classes/cs99...ts/CD4007C.pdf

[ironcoil]

thx Silver Dollar for your answer,

Sadly in Germany i can buy this:
http://www.produktinfo.conrad.com/da...DIP14__TID.pdf

is this FET similar to the other FET of fairchild?

[salih]

This project has a big problem and it needs always silent until the button is pressed every five seconds at maximum sensitivity

[ironcoil]

@salih

are there any mods to this problem?

[Silver Dollar]

Sadly in Germany i can buy this:
http://www.produktinfo.conrad.com/da...DIP14__TID.pdf

is this FET similar to the other FET of fairchild?

Yes this is the same part!

[ironcoil]

thank you Silver Dollar,

salih mentioned before that this detector has big problems!
Did you build your own? Did you have any problems?