2 boxxxx :)

[Ruben2000]

Hola Kt315, no entiendo lo que eso significa.
Lo siento con mi ingles soy de peru

[kt315]

hola amigo

[Qiaozhi]

Hola Gary, me gustar?a que publicaras tu TR LOCATOR del hilo # 346. Tambi?n me gustar?a construirlo, solo soy un principiante. Buen trabajo para las correcciones de PCB de este proyecto. Gracias a ti y a todos los que han contribuido a este proyecto.

Hola Kt315, no entiendo lo que eso significa.
Lo siento con mi ingles soy de peru

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[Ruben2000]

[QUOTE]Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

I'm sorry because my PC was set to machine translation, the words are inserted in the forum in my language; I'm trying to see how to insert them in English.

[Ruben2000]

I wanted to know if I can find a PCB and all the information of the TR LOCATOR since I have seen in this thread that the PCB has some errors and I have seen that Gary was successful in his T / R I would like if someone can help me because I want to build it. I would appreciate your help.

CORRECTION:
# 719 = Hi Gary, I would like you to publish your TR LOCATOR of thread # 346. I would also like to build it, I'm just a beginner. Good job for the PCB corrections of this project. Thanks to you and everyone who has contributed to this project.
# 721 = Hi Kt315, I don't understand what that means.
I'm sorry with my English, I'm from Peru

[kt315]

what gold in Peru? inki? all information was on site of Gary, but i do not know today condition of his site.

[Qiaozhi]

Here's the link to Gary's projects -> http://chemelec.com/Projects/Projects.htm

[Ruben2000]

Thank you very much Qiaozhi but I did not find anything of the T / R I think I will have to design my own PCB.

[magic12]

Any One


is it Possible To add a Retune/Tune/Reset Button

to Any Existing 2 Box Like Gemini TW6 Metrotech Detectron Goldak

The Main Disadvantage I See with this device is the mineralization
on Bad Ground a Device like Whites tm600 tm808 and Garrett Eagle Eye seems to perform better because of the Ground Balance

[Carl-NC]

Short answer is 'yes'. Long answer will take me a little longer to devise. I'll follow up later.

[Carl-NC]

This is valid for the TW6 & Gemini 3, which are identical designs. Probably also the Detectron 505, which appears to be a copy of the TW6.
There is a final amp stage which has the Threshold control:



You can add replace the Threshold control with an autotune circuit like this:



It is absolutely critical that the new opamp has an ultra-low IB spec to avoid drift, I would use a CMOS-input opamp. I put in some startnig values for some components but they will need some figuring out. Increasing the 1u cap will help with drift. You may need to add outboard resistors to R49 to restrict the voltage range, I don't know for sure. R48a-b will also have to be figured out, I would set R48a = 1k and then work on R48b.

Before modding the circuit the first thing I would do is measure the DC output for U4d for the entire range of R49. You want the new circuit to reasonably match this.

[Riss]

The biggest problem with these TX – RX locators is mechanical instability - the change of angle between the transmitting and receiving coils . This causes false alarms at every step of the operator. Has this problem been discussed ?

[ata]

Hello. Who has made sascho tow box with good results? Please reply

[ata]

In your opinion, tm 808 can be built with the available information;