Отправлено: 17.08.08 14:17. Заголовок: Signals to check

I have finished to build the mod03m but it doesn’t work. I am afraid.
Two overlapped tones are always present and the led is on.
I have checked all the wires.
All the IC are new and working. All the voltage are ok.
I am using my oscilloscope for found where is the mistake but without results.
Please, can you give me an help about the signal to check ?
Thanks in advance.

 Отправлено: 17.08.08 20:36. Заголовок: HI ! I solved the pr..

HI !
I solved the problem about led and sound but it doesn't work the same.
I tryed to turn R57 and R26 but without reults.
I setted also R44 for maximum sensibility.
Trying to regulate threshold I didn't saw anything change.

Which is the correct procedure to do for setup ?

Thanks in advance for any answer,
Marco

 Отправлено: 17.08.08 20:41. Заголовок: I tryed to translate..

I tryed to translate the messages in the forum using some online web translator but the results are bad.
I understand only some words.
The russian language is very difficult.

 Отправлено: 20.09.08 11:43. Заголовок: Please, can someone ..

Please, can someone describe to me the procedure for tune mod03m ?
Thank you.

 Отправлено: 23.10.08 14:11. Заголовок: Hi, please, which is..

Hi,
please, which is the procedure to do for setup this detector ?

 Отправлено: 26.10.08 10:28. Заголовок: Friend, This device ..

Friend,
This device has made few users and they have done a long time.90s2313 this device is used with a frequency of 20. it is much more datashita 90s2313, may not work. dd coil should be reduced to 0. tx and rx tune in resonance around 8000 Hz, you can select the frequency from 6000 to 9000 Hz, it depends on the capacitor in tx and rx, the accuracy of the settings +/ - 100 hertz, feeding frequency resonance for tx from 90s2313 on tx governing button frequency. Observe the sine on tx, key witnessing in the 4066 sdvinutye pulses, one of which is regulated by buttons phase.

 Отправлено: 26.10.08 15:21. Заголовок: Great friend MV !!! ..

Great friend MV !!!
Thank you for your answer.
I am very happy that you are helping me to solve this problem.

> 90s2313 this device is used with a frequency of 20.
> it is much more datashita 90s2313, may not work.

I know the problem.
I bought n. 28 AT90s2313 from 8 different seller and I have found only 2 working chip at 20MHz.

> dd coil should be reduced to 0.

I don't know if I have undenstood well.
I have understood that I must place the two coil in a way to obtain the minimum signal at the rx input.
Is it correct ?

> tx and rx tune in resonance around 8000 Hz,
> you can select the frequency from 6000 to 9000 Hz,
> it depends on the capacitor in tx and rx,
> the accuracy of the settings +/ - 100 hertz,
> feeding frequency resonance for tx from 90s2313 on tx
> governing button frequency. Observe the sine on tx,
> key witnessing in the 4066 sdvinutye pulses,
> one of which is regulated by buttons phase.

Sorry, I don't understand the "sdvinutye" word.
I can change frequency using the pushbuttons.
However, first I must search the resonance frequency, but how can I see if the coils are in resonance ?
second I must see the sine of tx, but what I must see ?
third ???

Sorry if I haven't understood all your information.
Please, continue to help me.

Thank you,
Marco

P.S.
For all reader of this forum:
I will show the photos about all I have built If I found a way for finish this md.

 Отправлено: 26.10.08 21:17. Заголовок: Dear friend, I u..

Dear friend,
I understand your questions, but I do not know the language so well that to write technically correct and understandable.
look at the topic: http://thunting.com/geotech/forums/showthread.php?t=12692
If you read or even make the device TGS (L), then you can easily understand how to make the device MOD3.

 Отправлено: 27.10.08 08:50. Заголовок: Dear friend MV, I th..

Dear friend MV,
I think that your help is perfect.

I am going to read all the informations of this topic.

Thank you, very much,
Marco