DIY a detector

[Alberto]

G'day all
I hope to know if it is possible to DIY a
detector that can compare with a gp 3000 or one of a SD Series?
I am going to use it to prospect in mineralized ground.
Can anyone provide me with some advice if it is possible.

Regards

Albert

PS: thanks to Qiaozhi for confirming my registration.

[Reg]

Albert,

You don't mention anything about where you may be trying to use the detector or the size of gold you hope to find. Those issues are important.

Now, as a simple or general rule, the answer to your question as to whether you can build a PI that will compete with the SD or the GP series, the answer is no. At least, not without adding a form of ground balance, if the ground is bad.

I have used a non ground balancing PI in the US reasonably well but I had a DD coil on the detector and added a second (autotune) filter to reduce the ground signal. With this combination, I could hunt many locations and do quite well. Later I added a form of ground balancing and that made a big difference.

Reg

[Geo]

Hi Reg.
Maybe he can try the GS4. I think that GS4 has GB.

Regards

[Reg]

It is too bad that no one made pc boards for the GS 4. With a few minor changes, the design could be simplified also. There is no need for sel 2 so that could be eliminated.

Also, the switch between modes could be nothing more than a toggle switch, as could the one between ground balance and no ground balance.

So, the multi position selector switch could be eliminated using the basic approach mentioned above.

Reg

[Geo]

I agree with the modifications.
But i think that a guy from Russia made a pcb for SMD components.
If so, then its OK if there is the knowhow to solder the SMD components.

Regards

[Alberto]

Hi Reg
I am going to prospect in West Australia. I think the ground there may be mineralized. my requirement is that any detector can find a lid of a coca cola bottle size metal buried 3 feets under the ground can do the job.
In addtion, can you tell more detail about your ground balancings device?

Regards

Albert

[querrick]

DEFECTIVE TM808 CAVE MODE

HI GEO, DOES ANYONE HERE KNOWS HOW TO REPAIR DEFECTIVE TM808 CAVE MODE?..THE PROBLEM IS EVEN I BUY A NEW ALKALINE BATTERY THE METER COULD NOT REACH TO YELLOW MARK ITS UP TO THE#2 IN METER AND IT CANNOT DETTECT ANYMORE...

[pourang]

HI GEO, DOES ANYONE HERE KNOWS HOW TO REPAIR DEFECTIVE TM808 CAVE MODE?..THE PROBLEM IS EVEN I BUY A NEW ALKALINE BATTERY THE METER COULD NOT REACH TO YELLOW MARK ITS UP TO THE#2 IN METER AND IT CANNOT DETTECT ANYMORE...

.hi repair tm808 cave mode very easy.but tm 808 new(smd) not cave mode repair hard.i can help your repair tm808 cave mode.

[querrick]

.hi repair tm808 cave mode very easy.but tm 808 new(smd) not cave mode repair hard.i can help your repair tm808 cave mode.

thanks in advance sir...what is the parts or ics should i remove to trouble shoot my unit?can i ask ur favor sir......

[pourang]

hi

hi. Substitute ic LM.324 AND IC 3140 AND 4011 AND IC 4016 IC LM 339 THE IC 3140=RESET PUSH BOTOM AND METER. PLEASE SUBSTITUTE THE IN 5 IC AND YOUR WORKING THE SYSTEM GOOD LUCK. YOU JUST FOUND THE ORGEINAL IC AND BUY .OK. GOOD LUCK PLEASE SEND THE HIGH QUALITY PHOTO ON BOARD TM808.

[querrick]

hi. Substitute ic LM.324 AND IC 3140 AND 4011 AND IC 4016 IC LM 339 THE IC 3140=RESET PUSH BOTOM AND METER. PLEASE SUBSTITUTE THE IN 5 IC AND YOUR WORKING THE SYSTEM GOOD LUCK. YOU JUST FOUND THE ORGEINAL IC AND BUY .OK. GOOD LUCK PLEASE SEND THE HIGH QUALITY PHOTO ON BOARD TM808.

thanks very much sir,in my board there are 3-LM324N,01-CA3140E,01-MC14011BCP,01-MC14016BCP,01-LM339N.I DONNOT KNOW HERE IN OUR AREA SPECIALLY SOUTHERN MINDANAO PHILIPPINES THE AVAILABILITY OF THE ORIGINAL IC PARTS,BUT IF DID NOT IS THERE ANY REPLACEMENT IC #? OR I CAN ORDER YOU THIS PARTS?ABOUT THE PHOTO HD I CANNOT SEND YOU BECAUSE IS MY MOBILE PHONE CAMMERA ONLY..THANK YOU VERY MUCH SIR FOR YOUR HELP EXTENDED TO I TRY TO REPAIR.

[pourang]

yes all ic Substitute until repair your tm808 good luck

[querrick]

yes all ic Substitute until repair your tm808 good luck

OKEY SIR THANKS FOR SHARING YOUR IDEA TO ME..HOPE MY UNIT WILL OKEY COZ AS OF NOW WER SO MANY PROJECT SITE......

[querrick]

TM808

yes all ic Substitute until repair your tm808 good luck

MY TM808 UNIT NOW OKEY I REPLACE THE IC'S YOU TOLD BEFORE,THANK YOU VERY MUCH SIR..BUT MY PROBLEM NOW IS HOW TO USE?DO YOU HAVE AN IDEA ON HOW TO USE BECAUSE FROM BRAND NEW UNTIL IT DAMAGE I CAN DETECT OR FOUND ANY PRESCIUOS METAL.AGAIN IM ASKING YOUR KIND HEART TO PLS.HELP ME ON WHAT IS THE CORRECT USSAGE ON THIS TM808 CAVE MODE VERSION....