Nautilus revisited

[dbanner]

I have pcb layout file for the DMC-2b, components values and all good. Don't have wirements for pots and switches etc. I managed to work out the two sens pots, the discrim and ground balance pots, the Rx an tx, where they connect on pcb. What's missing is the rest of switches and pots of remaining controls.
Will post layout if someone can work out " wirements" or can put pics of said.

[dbanner]

The layout file I have is of original DMC-2b pcb, not the the DMC-2. Thanks.

[Skippy]

Do you have all the info in this thread, the rar file that KT posted?
http://www.geotech1.com/forums/showt...-IIb-schematic

[dbanner]

No, I don't. It says file no longer exists.(RAR)

[Skippy]

PM him, ask if it can be re-posted. Failing that, someone else will have it, I did download it, but it's possibly lost due to hdd failure. I'll look for it, I may have it archived somewhere else.

[kt315]

i got more info from russian guy than from anybody on the land of nautilus. strange metamorfothes. what i have. SCH file.
i try open it by different CADs and get no reaction.

[dbanner]

Thanks for your help. I will try to open file.
I will put pcb layout of DMC-2b here today. Just need to get back home to my laptop.

[dbanner]

I opened the file, it is express .sch file, but I already have this schematic of DMC-2. It is DMC-2(b) that am seeking. thanks anyways.

[Melbeta]

I do not have the entire schematic of the 2b myself, I have not seen it posted so far. But I do have some material, and will post it after I see the PCB layout of the DMC-2B. What I have was posted by others in the past, and I do not know if you have it or not.

I went to the Russian site in the past, but did not find what KT315 must have found as I cannot read or write Russian.
Melbeta

[dbanner]

Here is the layout. I was not bluffing. Took many hours.Summer project?

[dbanner]

i got more info from russian guy than from anybody on the land of nautilus. strange metamorfothes. what i have. SCH file.
i try open it by different CADs and get no reaction.

Ask Russian bloke for more pics so we can make new project.

[kt315]

http://depositfiles.com/files/au0qyjdqg

[dbanner]

Thanks for the file. It will be helpful. I can almost work out everything. It's difficult work, but not impossible.

[Altra]

The DMCIIb uses a complex coil with a center tapped TX and dual feedback windings for nulling. In addition it has two 10t pots to null the coil at 0 and 90deg. These pots are connected through the cable to the preamp inside coil. Not an easy build. A similar coil was used in the fisher 1210x and some other x series, but with out preamp.

The DMC II has a normal concentric coil with the preamp in coil. The schematic "DMC2.pdf" in KT's zip file is hand drawn by Jerry and should be accurate.

Coil data for the DMC II Tx 3.20mh 10ohm and Rx 8.42 30ohm. A DD coil would be easy to construct.

Back in the late 80's and up to his retirement, I used to speak to Jerry Tyndal quite often. He was a very generous person and would share "how to" information. This was before widespread internet. Most of the information related to metal detectors was considered to be trade secrets and closely guarded.

[dbanner]

Thanks for valuable information. I am making great progress. I know it is difficult build. I now have all components on pcb labelled with correct values etc.
I have also worked out wiring for the slb 10 turn pots you mentioned. Just a few more things to figure out and I'll have complete details of this device. Thanks again