Can pinpointer detecting thin chain?

[greylourie]

Okay, Fabian Do not look at the old pictures, but only use this.
If you have any questions you can just ask.
nupi

Hello nupi,

This is a good instructional picture. Nice and clear. Is there anyway we could make it easier to find ? Maybe start a Nupi Pinpointer thread ?

Anyway thanks for your work.

[maxm3s]

which function of R1 and R2

[Nupi]

Ok. If you have time and desire to do it now, I'll wait.

Thank you VERY much for the support, Nupi.

Fabián

Okay, Fabian Do not look at the old pictures, but only use this.
If you have any questions you can just ask.
nupi

[Fabian]

Ok. If you have time and desire to do it now, I'll wait.

Thank you VERY much for the support, Nupi.

Fabián

[Nupi]

Okay, it seems that messages is delayed .
The coil is not good.
I think I made the confusion with pictures.

I'm going to change what images to make it clear. It may take an hour, okay?
nupi

[Fabian]

Can you tell me the ideal values of each layer in mH and ohms? I will make a new coil.

[Fabian]

These are measurements



L1 to L1a-L2 (0,35 wire) 1,9 Ohms - 2 mH
L2 to L1a-L2a (Two layers coil) 4,2 Ohms (0,28wire) - 2.5 mH
L1 to L2a 5,1 Ohms 3.4 mH

[Nupi]

Aaaaaaaah!
Would you measure the coil between L1 and L1a-L2 and between L1a-L2 and L2a and between L1 and L2a?

[Fabian]

Henries

[Nupi]

What is H scale?

[Fabian]

I made it as you described in the thread:

71 turns in the first layer (0.28 wire)
74 in the second one
and 54 in the last one (0.35 wire)

I've have a multimeter with H scale

[Nupi]

The values are too high. They should be about 0.6 and 1.6 ohms.
How many layers have you wrapped?
Do you have an inductance meter.?

[Fabian]

Is good, that means that the error is not in the IC, but in the coil.
I'm afraid you have the coil not connected properly or is not wrapped properly.
1--Please make sure the coil is connected properly.
2--Measure the resistance between L1 and L1a-L2 and L2-between L1a and L2a and between L1 and L2a. What is resistance do you measure?

L1 to L1a-L2 (0,35 wire) 1,9 Ohms - 2 mH
L1a to L2a (Two layers coil) 4,2 Ohms (0,28wire) - 2.5 mH
L1 to L2a 5,1 Ohms 3.4 mH

[Nupi]

Is good, that means that the error is not in the IC, but in the coil.
I'm afraid you have the coil not connected properly or is not wrapped properly.
1--Please make sure the coil is connected properly.
2--Measure the resistance between L1 and L1a-L2 and L2-between L1a and L2a and between L1 and L2a. What is resistance do you measure?

[Fabian]

What is the "immetter"?

At the same point (BC560 emitter), with the R4 connected, got the same volts: 5.1

Fabián

That's the measurement