For sale bare boards for Delta Pulse/Sniffer XR-71

[kt315]

Sheilding the board will cerainly improve the performance but will it be sufficient?

i ask you again do not ask me idiotic doubling questions.
if i say TO DO that is mean only (ONLY) TO DO, without your sufficient fantazy and 'will it be or will it be not'.

[chuubaba]

I meant the same thing and it shall be done.
Thank you very much for your attention.

[kt315]

the shield shall be done without objections from aside. believe me now. it did cost me very big blood.
shipment of DP from buyer back. long seeking the problem. reshipment back to buyer.
NOBODY COULD HELP ME IN THAT -!

everybody who is buying DP soldered board on ebay from bulgarians will get huge problem because
he does not understand a cause of the instability -!

[kt315]

small coil from DEEPERS 10DD. i do not remember a size, maybe anyone can reminder.

[chuubaba]

What this sheet of metal inside the housing ?
https://www.geotech1.com/forums/albu...chmentid=40412

[kt315]

you may -
1. put isolated metal sheet under pcb
2. put graphite layer under pcb

[kt315]

i asked you looking ALL PICS https://www.geotech1.com/forums/albu...chmentid=40411

[kt315]

i ask you to create an album and put pics in it. also videos, on youtube.

[chuubaba]

And do you want me to layer the entire enclosure with copper?

https://www.geotech1.com/forums/albu...chmentid=40353

[kt315]

i gave examples HOW THAT DO SOME COMPANIES. JUST EXAMPLES.
people must LEARN ON THE EXAMPLES if they do now want understand my words how to shield!

you must do graphite layer. DO NOT ASK ME DOUBLE QUESTIONS!!!!

[chuubaba]

i gave examples HOW THAT DO SOME COMPANIES. JUST EXAMPLES.
people must LEARN ON THE EXAMPLES if they do now want understand my words how to shield!

you must do graphite layer. DO NOT ASK ME DOUBLE QUESTIONS!!!!

Such type of companies are flyby overnight run by idiots for scamming the public. We are not learning to to tie shoelaces that can be explained by examples. You decide now.

I have installed insulated metal sheet to the bottom of the board and connected it with GND near DA4. I am using 1m x 1m coil. The machine is beeping on its own. It is able to detect cola can at 65 - 70cm distance. If I increase DEPTH pot and SENS pot and T/HOLD then it makes lot of noise automatically.
Now i want to put it inside a enclosure. I have aluminium foil to wrap around the enclosure. Will this work for experiment.
Once i test the cola can at 2 meters then i will do a permanent enclosure.

[kt315]

again you do mistakes.

1st mistake. you choice the shield dot unright. the pcb has especial TWO dots for the shield. find out them.
2nd mistake. i NEVER told you to test DP with big coil in your room. AGAIN READ THAT I WROTE ABOVE -!!!
you may use 1m coil JUST FAR FROM BULDINGS AND ELECTRIC LINES.

in your room - JUST SMALL COIL! speccialy done for THE TESTING ONLY -!!!

3. you have to find absolutely clear**** place in field and test JUST AT IT -!

**** clear from any metal around in the depth in ground and near on its surface.

4. I have aluminium foil to wrap around the enclosure. - idiotic decision. NEVER USE THE ALUMINIUM FOIL.

5. when your PCB on a table, in static, not moving, you DO NOT NEED the shielding.
just you begin to move right now you SHARPLY NEED the shielding -!!!

REMEMBER THIS SIMPLE RULE ON WHOLE YOUR LIFE!

ESFI is being created JUST AS you move a subject in air, bring it from one place in another, take it,
lift up, move the coil over the ground etc.

[chuubaba]

again you do mistakes.

1st mistake. you choice the shield dot unright. on pcb are especial TWO dots for the shield. find out them.
2nd mistake. i NEVER told you to test DP with big coil in your room. AGAIN READ THAT I WROTE ABOVE -!!!
you may use 1m coil JUST FAR FROM BULDINGS AND ELECTRIC LINES.

in your room - JUST SMALL COIL! speccialy done for THE TESTING ONLY -!!!

3. you have to find absolutely clear**** place in field and test JUST AT IT -!

**** clear from any metal around in the depth in ground and near on its surface.

4. I have aluminium foil to wrap around the enclosure. - idiotic decision. NEVER USE THE ALUMINIUM FOIL.

My testing place is not located in urban location. It is a remote farm house and i am testing outside in open area. The only power line is 220v AC. The nearest power line is 500' away.

[kt315]

yup yup, metal infected place. plus power lines, internet lines, pipes, fittings. say me about purity.
DP IS VERY SENSITIVE DEVICE WITH 1M x 1M COIL -!!! REMEMBER THIS SIMPLEST RULE -!

[chuubaba]

yup yup, metal infected place. plus power lines, internet lines, pipes, fittings. say me about purity.
DP IS VERY SENSITIVE DEVICE WITH 1M x 1M COIL -!!! REMEMBER THIS SIMPLEST RULE -!

Ok i change to small size test coil.
I am going to make powder of graphite from 1.5V battery cells and mix with varnish or bitumen to coat interior of wooden enclouse.