Threshold Pot doesn't work

[h9361]

SVGA Monitor Cable

Thank you dear Pito

[Carl-NC]

Does your RG59 have a solid center conductor or stranded?

[h9361]

Does your RG59 have a solid center conductor or stranded?

It is solid center.

[pito]

or

CANARE MR202-4AT/8AT/16AT/24AT two-core four-way aluminum foil shielded multi-channel microphone audio cable AVS - AliExpress

[h9361]

or

CANARE MR202-4AT/8AT/16AT/24AT two-core four-way aluminum foil shielded multi-channel microphone audio cable AVS - AliExpress

Thank you my friend.
I already used the Audio cable, but it destroys TP4 form if i use a shield to coil and connect it to ground!
https://soundco.co/product/3030-microphone-cable/

[pito]

Do you have any suggestion (cable) for DD coil? = that was your question, DD has 2 coils so the best is to use two separate shielded pairs.
but it destroys TP4 form = show circuit

[h9361]

Do you have any suggestion (cable) for DD coil? = that was your question, DD has 2 coils so the best is to use two separate shielded pairs.
but it destroys TP4 form = show circuit

[Carl-NC]

It is solid center.

You can get RG59 with a stranded center conductor.

[h9361]

You can get RG59 with a stranded center conductor.

Dear Carl
I am going to design SMD PCB for my HHD+GB.
As you know, for adjusting offset of 5534, i must not to install IC 8 (TL072) and connect its pin1 to ground.
Anyway, do you have any suggestion for this problem so that i can adjust the offset with installing IC8?
Thank you

[h9361]

You can get RG59 with a stranded center conductor.

Hello
Dear Carl
I have a question about DD coil.
As you know, commercial coils use thicker wire for TX and thinner wire as RX.
My question is about thickness of RX wire.
Do you think thickness of the wire (RX) affects on sensitivity of PI machine?

[Carl-NC]

The RX coil is usually connected to a high impedance preamp so the RX coil current is very low and thinner wire can be used with no reduction in sensitivity.

[h9361]

The RX coil is usually connected to a high impedance preamp so the RX coil current is very low and thinner wire can be used with no reduction in sensitivity.

Thank you for your valuable information.
So there is no difference between thinner and thicker wire (RX) for sensitivity.

[Carl-NC]

In most cases, no.

[h9361]

In most cases, no.

Hello
Dear Carl
I hope you are passing good days.
As you know, i am using the audio schematic (#339 post in this thread) for my HHD.
In addition, i added a DISC schematic for Fe detection (you can see its end part, output) and it works but its output is uV.


Now, i want to connect my DISC output to the audio schematic so that my audio generates a silent or cut off sound if the DISC pcb have an output.
Is is possible to guide me which points are better to be connected together?
Thank you.

[h9361]

In most cases, no.

Hello
Dear Carl
Please forgive me for my question.
Is it possible to help me about the following problem (attached pic)?
I want to connect pin7 to ground if its below schematic has output (uV output).
The blue box is a simple method but i don't know its resistor values and connection point of the below schematic (red line) is true for active/deactive the bc847?!
I hope you accept to guide me, thank you.