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There is RETUNE button there....Comment
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But.... looking at all available informations....
hmmm....
Situaton is more like :Comment
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You seem to have all the instructions in the manual, so I don't understand what you're asking for.Originally posted by metaldetector107 View Post
If it doesn't work as advertised, then you should return it for a refund.Comment
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Qiaozhi, he writes he has not a problem with 'small' coil. he has a trouble with 'big' one only. in my opinion big coil is attached REVERSELY to the connector. he must open both connectors and learn wires' colors... must measure the resistanses... why HE DOES NOTHING I have asked him about?Originally posted by Qiaozhi View PostComment
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MD-5008
Dear All
my problem is poor performance specilally with 33cm coil disc no disc at all
when trying to zero the Disc should be on mini other wise the meter goes fully right i cannot zero it with big coil in maximum disc only if i put the search loop on big metal then i can zero it. the manufacturer says it should reach 40cm for single coin but no more than 20cm and no disc at all.
the small coil is a bit better at least good disc but poor detection like big one so please helpComment
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MD-5008 continued
here is other picturesComment
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You would have to change battery at your multimeter!
Maybe KT315 is right; maybe coil connectors are really messed up. It is so usuall for cheap products ,"Made in China".
Do not be confused with not so good performances of MD5008. You just can't expect high performances from such poor design.
I had MD3066s recently....uhh it was a joke, not detector. It is based on same schematic as MD3007 (model from 2002./2003.) but perfomed much worse than MD3007. Seems those who made MD3007 did a bit better job than those who made MD3066s later... Only different "cosmetics" (enclosure, shaft and outlook) but in essence same machine.
I do have hunch ; MD5008 is also one of numerous "Made in China" versions of some obsolete and old design , most probably some Radio Shack, Micronta or Bounty Hunter...or some simillar..
So..do not expect good performances from it.
As Qiaozhi suggested; try to return it to seller and get back your money.
Cheers!Comment
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Ah yes! Another thing could be your fully missunderstanding of working principle at that kind of detectors.
This is nonmotion detector and what is very important; you must adjust GEB and TUNE properly. Further by often pushing RETUNE button you are keeping it at edges of balance. Only that way it will run so so accuratelly. It is having Audio discrimination so as Scale disrimination.
If Retune button does not return to stabile functionalty and do not retreive it in Audio and Scale balance, than it means that some of front panel commands are turned to much left or right. Electronic inside is not able to retreive it from such situation. What you have to do is to readjust all the front panel commands and...for a test, just put those in middle positions, than rise coil to 10cm of soil and press RETUNE button, hold for a second and than release. Detector must work stabille than. But again you have to RETUNE it from time to time. That's how MD3007 and MD3066s are working. Also many other cheap and obsolete nonmotion detectors too.
I am not sure...but it is possible that you are expecting motion behavior from it....while it is nonmotion and confusing you much than...
You provided so few informations...Comment
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may present mine face I did open the box and see that the meter is connected... TO SPEAKER directly! OH, MY GOD! the meter does nothing in this device! it was the real DISCOVERY for me... what amazing surprise...
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That explains a lot.Originally posted by ivconic View Post
I do not know this detector, but from the description it did sound like a non-motion design.
Also I note that they quote the audio frequency as 437kHz.
Of course, this should be 437Hz.
Personally I would send it back to the seller and buy a real detector.Comment
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Yes...just look those commands; same as on MD3007, MD3066s and few other models.
It is actually the very same machine inside. I simply do not beleive this...!!
Ha,ha,ha!!!
First time i met this detector , really was inside MD3007!!! Right here on this forum we have thread already on that subject. Look at this link:
http://www.geotech1.com/forums/showthread.php?t=11662&highlight=canle
It was my early copy of MD3007. Later...recently i got MD3066s...different enclosure and cosmetics but inside was very same machine...and very same omega coil with it.
Now...looking at this MD5008 i see lot of simillarities. Same front panel commands, same working principles....same everything!
I guess all those "different" and *Made in China* cheap nonmotion detectors are actually based on same root - Micronta 4003 or simillar but with few modifications and upgrades.
Most probably they changed only working frequency (if not at all) and nothing else at MD5008.
If you open enclosure and take macro shots of inside, i bet we will see 4007,4069,CA4130,LM324....possibly one 4053....etc...etc...
Also if you open smaller coil; i bet it would be omega coil. Not sure about large coil.
And guess what?
RETUNE button is wired to pins 7. and 3. of 4007 ic.... So when you press RETUNE button - you actually short those two pins at 4007. So familliar...
It is same old detector in new appearance...again and again. Every 5 years that detector appears under new name and with new outlook!
It is just imperishable! Like a pest!
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No...i looked again and again that video. It is not even a MD3007 or MD3066s kind. It is Micronta 4003.... 100% ! It is having same one monothonic audio. At MD3007 and MD3066s there is upgrade in audio comparing to Micronta 4003. MD3007 and MD3066s are having 3 frequency audio. As signal is getting stronger - audio frequency is changing respectivelly in 3 steps (3 frequencies).
But at Micronta 4003 ...same as on this MD5008, audio is unchanged.
So...commands are same, behavior is same....it is the same detector.
Mictonta is a bit more instabille. This MD5008 looks more stabille, on video. So..i guess they also made small mod on it like it was described already...on this link:
http://www.geotech1.com/forums/showthread.php?t=14246&highlight=micronta+4003
I would like to see photos of the inside of this detector.
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The claims for this detector get even more outrageous ->
http://www.sulit.com.ph/index.php/vi....FREE+Delivery
The link above says that it's microprocessor controlled!!
And it only costs $366.39. This must be the most expensive RadioShack detector ever sold.
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MD-5008
Dear Ivco Qiaozh Kt Max
thanks all actually this time i was foolish i bought it for 1300$ too expensive
sory i cant open it i have to resolded even for 500$ no use with it the reasons for rush is i never see MD in my country (Iraq) when i heard i bought it cose it is
illigal here anyway i trust on all of you.
sorry for reapeted questions but only this time.
can you recommend me to alots of good brand detectors
for coin and prospecting up to 1m down earth.
Ivco mentioned some i want more names why??
in my country very hard to get what you want so if i know too many names may
be i can fine one at least
thanks againComment
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