Any DIY PI/VLF MD that can detect up to 2-5 meters depth?

[kt315]

hi

you certainly can choice equal value resistors from all 1% you have.
i bought ultraprecisions on ebay, showing to people the access, but ebay is not accessable for you i guess.
i also did search aliexpress on this matter and did not find nothing.

https://www.ebay.com/itm/Ultra-preci...eP2YPJsQoTZB1A

[ramin]

Yes i can not buy from ebay
But i have 4.5 k resistor 0.1
can i use it?

[kt315]

yes. to MEASURE THEM, to CHOISE SAME VALUE IN PAIR, and use.

[kt315]

This depth of 2-5 meters for cola can is fraud. After you buy the board you will never find the original chips. Also you will always fail to find correct values for components. The detector will not perform and the designer will start to insult you every time you ask questions about low depth. This claim about depth is scam. Better stay away.

looking the video. we see in it that cola can easely reacted on 2m. while in the test used a tin can but volume is same.
https://www.youtube.com/watch?v=2FXROo3zhAY

[ramin]

Hi

Why he didnt shield the box?? But the dp has no noise?

[kt315]

1. he is not in course of electrostatic shielding. did not still understand. this is his first test with 2x2m coil.
2. his box is in static position, not moving. that is meaning there is not ESFI. ESFI is created on enclosure cover JUST in process of moving in the atmosphere.
3. stroke you cat. onetime he will bite your hand. that because the cat DOES NOT LIKE the electrostatic charge-discharge.

[beiduo]

We can detect two meters of Coke bottles and three meters of objects

[tissaweera]

[QUOTE=kt315;264428]latest

pleasure[/QUOTE

Hello Anatolij , can I buy rev5 PCB ?

[kt315]

hello, yes. you can buy rev5. 10pcs left. i do pause on ebay because i wait orders from geotechers at first.
if they will silent i will be back on ebay again.
14 euro for one. 2 euro DVD with archive. 2 euro HV diode. on your choice.
LC coil generator boards were gone. opamp tester boards were gone too. no them.

[tissaweera]

Hi anatolij

For r23 to r26 i dont have access to 0.1% telorance resistor
Can i use from 1% telorance?

I came across here https://www.aliexpress.com/item/4000...59e84c4dBrU3ks

[surfdetector]

3. stroke you cat. onetime he will bite your hand. that because the cat DOES NOT LIKE the electrostatic charge-discharge.

This is a good saying

[kt315]

I came across here https://www.aliexpress.com/item/4000...59e84c4dBrU3ks

you may choice sure equal resistors on value from big amount, 20...30...pcs from one pack, of one manufacture source.
but remember they can change a value, because they did not stay in electronics, no life run. then heat up those you choiced, by slight touch of solder gun end on both resistors' pins.
let them to cool off to room temperature. then measure again.