MD3007 (Micronta or Seben?)

[ivconic]

I had this few years ago. I did complete reverse eng. at the time. Also did some rearrangements on pcb. Later i made 20 copies of this device.
Actually it is not bad at all. Can not compete with Better detectors on market. Also can not compete with Tesoro Golden Sabre...but. It is pretty descent detector. Especially suitable for those who wants non-motion detector. It has descent discrimination, descen GEB, it has multitone audio, it has also LED discrimination - Red Led for iron, Green Led for coloured items, followed by audio. 3 working modes....
I used it many times on the field and had a lot of nice finds with it.
I am not sure that it has something to do with CScope (probably not) but it is designed and acting pretty simillar as CScope 1220B i used to have also...
I was and still am very lazy man, so i never traced out this to sketch schematic, i only reproduced it the way it is in original.
I am giving it here for you people as a gift! I do expect only one thing from you; if someone of you have good will to trace it out and draw schematic and of course to post it here later.....No obligations...
I guarantee this is fully operational without mistakes...so be free to make your own copy, you will pretty satisfied with it!
Regards!

[ivconic]

More photos

Here are more photos on this....

[ivconic]

Huh! Only pay attention on transistors pin assignements! Now i remembered that didnt measured those correctly....so my pins are might not be correct. Not a big deal, just put noted transistors and obey orientations you can see on original pcb above....
I prepared this on Serbian language...so if any questions i can translate...although there are just few words there on photos. For example "pocetak zavojnice" iz start of coil windings and "kraj" or "zavrsetak" is end of windings....etc...etc...
Regards...
If i remember something more that can be important here, i will post.
I made last one few years ago.....time has passed...i forgot to many things here....damn it seems i am aging

[amtech2005]

Happy Thanksgiving

Happy Thanksgiving to Everyone !!!!! Eugene amtech2005@yahoo.com

[ivconic]

I'll drink to that!

[ivconic]

Specification datas:

Technische Daten und Infos:

Audio Frequenz:15 KHz +/- 2 KHz
Audio Frequenz: F.L. 400 Hz +/-60 Hz
F.M 700 Hz +/- 105Hz
F.H. 1500 Hz +/- 255HzGewicht:1,5 kg Abmessungen: LxBxH (nicht ausgezogen): 636mm x 220 mm x 185mm Suchspule: 20cmStromversorgung: 2 x 9-Volt-BlockKopfhörerbuchse:3,5mm Ortungstiefe:größere Objekte max. theoretische Suchleistung 200 cm kleinere Münzen circa 18 cmkleinere Münzen:ca. 35cmArbeits-Frequenz:15 KHz +/- 2 KHzDiskriminator-Technik:(Metallunterscheidung und Ausfilterung)

[aft_72005]

Hi ivconic
Interesting work, thank you for upload it.
Regards.

[Max]

Here are more photos on this....

Hi Ivconic,
really nice work with that MC3007. Thanks for uploading it.

Did you made any schematic of it ?

PS: I think the coil (that's similar to some Andy Flind's project and really popular in the 70's) can give better pinpointing than standard DD coils... but problem is that's not so good on performances like DD are. What do you think about ?

Best regards,
Max

[ivconic]

Indeed Max, it is true. It has not great depth, yet it is very good for pinpointing. Ifounded with it relly very small items, like grains. On shallow coins (down to 10cm) it is very useable. Pinpointing is 100% accurate.
Main reason i posted it here is to offer here pretty descent non-motion detector, since we already have here few very good motion detectors.
Unfortunatelly i dont have scheamtic for it. Like i said i was to lazy to sketch it than...and now i am even more lazy

I am not sure...but look micronta 4003 schematic (if i am not mistaken) and you can see pretty simillar design...
I was hoping that some member with very good will can have some spare time and draw schematic, and later post it here...
Regards!

[aft_72005]

Hi ivconic
Are you examine it with DD coil?
What is your result?

[ivconic]

No. I made it few years ago.Only original setup.
But this is interesting question. Can be tried to achieve more depth.

[Unregistered]

Please upload here number of windings for double d coil.
Kindly regards!

[Steve in MS]

ivconic, I was going to see if there were still some of those detectors around and did a google and other searches, couldn't find one, wouldn't you know, everytime I get interested in a detector they get scarce.
I found it on a chinese website, I don't know who they copied.

[dusmenil rocha]

md 5008 and md3007

Friend thank you for assisting me; the md5008 is not same to the md3007; maybe the functions are same, see the lewat of the plates of the md5008 and voçê vera that are different totalmne. the md5008 has two plates; one of the oscilator and another of the analizado and discriminador.; any form thank you very much peak helps.
please sende-me yu email for remess fotos

[kt315]

md-5008

please attach a photo of your PCB. this is MD-5012 one.