Vallon VMH3CS Mine Detector

[Carolina]

That is not soil compensation. It is very involved. If you PM me Your email address I will send you a manual. Your coil question is quite involved also. You have many issues to solve before you worry about potting.

Carolina

[Rocketdemon]

Great I got it today, all looks good. When put in mineral mode it indicates full scale, all LED's, then it gradually drops down to zero LED's. Is this Auto Ground Balance?

Regards

[Rocketdemon]

Hi all,

Just read through this thread as my VMH3S is arriving on Monday, was going to get a 2nd hand CS4PI as an intro to PI detecting on wet sand but the Vallon looks like a far better purchase!

All very interesting stuff, 1st question that comes to mind is what effect does potting/sealing have on capacitance/inductance of a DIY coil, sorry to be slightly off topic.

Regards

[lucafa]

Ok kingjl
No problem.
however you are very kind.
Regards

[KingJL]

I really don't have much to add... the identification of the subject components was accomplished by others!!

[lucafa]

Many thanks kingjl.

In my PCB OPA627 is marked 48760 and DG442 is marked 48790.
You have feedback with other pcb as it is marked on mine?
I think start retro engineering. I wanted to understand how schematic structured.
If not problems for you I would like to write you in private message about the work to have an exchange of ideas.
Regards

[KingJL]

TOP right: 4532A

Bottom right: 8 pin SOIC is OPA627; 16 pin SOIC is DG442.

[lucafa]

HI

A question.
I have drawn yellow arrows on the image. Does anyone know what components they are?
BYE

[lucafa]

Hi
Heres another pdf info about vallon

http://commons.lib.jmu.edu/cgi/viewcontent.cgi?article=1636&context=cisr-journal

[Zajber]

Heres another link hosted on my Onedrive.

https://1drv.ms/b/s!Akmc4WLuH1rlhJIxnwux3dwsroNAcw

[Zajber]

Thank you!

Will upload and post link later.

[smokingdragon]

Cheers for the download!!
Simon

[chevesne]

https://drive.google.com/file/d/1wrBZ8d0quNX5Wq-I9xY_vY8HhICJ7gxN/view?usp=sharing

Edit: Only for 2 days.

[Altra]

Try this link

http://www.vallon.de/download.lasso

Sorry it appears the operating manuals are no longer listed

[Zajber]

Hi!

Does anyone have the manual for the VMH3CS?
Mine is acting up and I would like to check the manual.

I can host it for others if I could get a copy.