IDX-PRO+VDI

[ashefr10]

For threshold tone discrimination mode, you have to eliminate the resistance of 470 ohms, and connect a 4K7 resistor between pins 6y7 of U4 (LM393). This way you will get a nice tone threshold discrimination mode. The threshold tone level is adjusted with the potentiometer sensitivity. Greetings. Eduardo.

I have to remove the 47 ohm resistor R25 to a wire in place and put a 4k7 between terminals 6 and 7 of the LM393?

[eduardo1979]

idx

idx

[ashefr10]

ok but instead of Resistance R25 I have to put a wire or not?

[ashefr10]

if I remove the resistance of 47 ohms Point P5 is no longer connected.

[eduardo1979]

I have to remove the 47 ohm resistor R25 to a wire in place and put a 4k7 between terminals 6 and 7 of the LM393?

You have to remove the R25 (47 ohms). It resistor remove without putting anything in its place. Simply remove. Add 4k7 resistor between pins 6 and 7 of U4 (LM393).

[ashefr10]

ok , thanks I will test tomorrow. what is the variable resistor VR4 (threshold)?
I thought I could remove the noise threshold with the variable resistor.

[dfbowers]

Interesting feature. You can now listen to the ground balance, hear discriminated items by the threshold dropping out and control the threshold almost entirely by the PP mode threshold.
Thanks!

[ashefr10]

What is the value of the variable resistor VR4 (threshold)?

[eduardo1979]

What is the value of the variable resistor VR4 (threshold)?

VR4 (Thteshold) = 100K.

[ashefr10]

the last pcb edouardo that offers several components have disappeared from the pcb I have. Two 1N4148 diodes and adjustable resistance VR3. I also see a resistance near the LM393 is not 2M2 and 1M. should I do the same thing? VR3 If this is not what I replace it with?

[ashefr10]

VR4 (Thteshold) = 100K.

OK but how to set this parameter ?

[eduardo1979]

I think I lost patience. I think things are pretty clear. In the messages that I posted yesterday, I think everything is clear. I do not like to repeat the same things 100 times. I will not go over that. Regards.

[ashefr10]

I think I lost patience. I think things are pretty clear. In the messages that I posted yesterday, I think everything is clear. I do not like to repeat the same things 100 times. I will not go over that. Regards.

thank you, they are not any pros as you, I am beginner I ask for advice. but good serious step.

[reiv]

Edurado could you just replay for my question in #1249
After this Yours update:
C23 - 3n9 -> 3n3
R24 - 1M -> 2M2
R25 - depends of U4 (my value about 800Ohm)
D2, D3 - out
VR3 - out, only R43 1k8 -> 2k2
I have worst masking, and my idx is a little unstable- is it normal or I have some sort of problem?

[ashefr10]

Eduardo does not want to help it regain tired of the same things 100 times! Sorry.