Tarsos detector vlf turkey

[Esteban]

Hola a todos

Para calcular el condensador que se instala en paralelo con la bobina recetora (en este caso esta marcada 6,8nF) es correcto utilizar la formula de Thomson para calcular con precision la capacidad teniendo en cuenta que conozco el valor de la inductancia de la bobina, se en que frecuencia oscila la bobina transmisora, solo tengo que extraer de la formula el valor de la capacidad, es esto correcto?
Gracias
Carlos

Hello all
To calculate the condenser to be installed in parallel to the search coil (in this case is marked 6.8 nF) is using the correct formula Thomson to calculate with precision the capacity taking into account that I know the value of the inductance of the coil, is that the frequency ranges transmitting coil, just got extract of which made the value of capacity, is that correct?
Thanks

Carlos

Yo suelo trabajar así: conociendo el capacitor aproximado, sustraigo o añado capacidad hasta lograr lo más crítico posible el punto cero. Por ejemplo, puedes empezar con 5.6 nF y vas añadiendo 1 n, luego 470 pF y ves si falta o sobra capacidad. Este ajuste es mejor que lo hagas en la sensibilidad media del potenciómetro sin moverlo para todos los ajustes. El capacitor puede estar tanto en el PCB como en la bobina, el cable es muy importante, yo suelo usar el plano.

[Carlos]

gracias Esteban por tu aporte, nadie del foro me puede explicar el ajuste del esquema? por ejemplo que tengo que ver en la pantalla de osciloscopio a la salida del primer operacional del receptor ajustando el preset de 22K, etc.? y los niveles de tension en diferentes puntos del circuito?

Gracias

Carlos

Esteban, thanks for your contribution, Any can explain to me the forum setting the pattern? For example I have to see on the scope screen at the exit of the first operational receptor adjusting the preset 22K, and so on. and the levels of tension in various parts of the circuit?

Thank you

Carlos

[Unregistered]

On witch distance this detector locate 1E in the air??

Tegards to all!

[Esteban]

gracias Esteban por tu aporte, nadie del foro me puede explicar el ajuste del esquema? por ejemplo que tengo que ver en la pantalla de osciloscopio a la salida del primer operacional del receptor ajustando el preset de 22K, etc.? y los niveles de tension en diferentes puntos del circuito?

Gracias

Carlos

Esteban, thanks for your contribution, Any can explain to me the forum setting the pattern? For example I have to see on the scope screen at the exit of the first operational receptor adjusting the preset 22K, and so on. and the levels of tension in various parts of the circuit?

Thank you

Carlos

Carlos

Justo a la salida del operacional puedes ver la criticidad del ajuste porque cuando pones el condensador/condensadores correctos cuando mueves la bobina receptora sobre la transmisora te es dificultoso ajustar, tienes solo quizá un milímetro o menos de luz, pero te recomiendo también una vez llegado a cierto punto crítico que sueldes en paralelo con el capacitor/capacitores de sintonía un tandem chico de AM (365 pF) y busques ya en rango de pF el ajuste. Cuando encuentres el punto que te satisface, desconeca el tandem y mide su capacidad y entonces sueldas en paralelo ese valor o uno muy aproximado. Es como la sintonía de una radio, necesitas ajustar al máximo para obtener fidelidad. Tienes que tener unos cuantos objetos chicos de metal como monedas y ver la sensibilidad. Haz los ajustes lejos de cualquier metal sin el reloj pulsera de la mano, etc. La mesa no debe tener clavo porque pone a cero falso, etc.

[greg59]

PCB

Hello,

Is it possible to post the pcb in "jpeg" or "gif" format ? because i don't have sprint layout ?

Which kind of voltmeter have to use ?

Thanks.
Best regards.
Greg59

[karlos x]

SL 5.0

greg59:

for you : http://thunting.com/geotech/forums/s...ad.php?t=11458

post #14

[TARSOS]

Hi friends..

Tarsos detector is my design.After l was retried interesting detector project.I started a few month ago..
l and my friend will help you
below link seem a fast coil adjustment but no fine tuning only fast and one hand working other hand hold the camera.
http://video.google.com/videoplay?do...65366081125948

download link http://www.savefile.com/files/1817529

before starting coil adjust all pot s will turn to left... 22k trim. high value .turn clock wise fully
detector sound will not comeing out in a moment on video decrease value 22k trimmer slowly until sound will come out and stop now turn to right disc. pot until sound will not come out. adjust fine tuning with geb pot.tarsos detectors working frq. 15,xx Khz tx amplutude 130vpp and upper
link below there are oscillascope views
l connected two multimeters rx point on pcb but ı read diffrent values?multimeter is false
http://video.google.com/videoplay?do...43699969438815

download link http://www.savefile.com/files/1818670

best regards ....... emekli AMCA(51)

[greg59]

Question

Hi Tarsos

Can you tell me wich model of voltmeter do you use ?

Thanks
Greg

[nelson]

Hi Tarsos and congratulations for your support to metal detecting hobbie.
I saw one google video that shows his performance very good. I ll also like to know how the detector performs on the field?
Also, can you post please inductances for TX and RX coils?
In advance many thanks
Nelson
Santiago, CHILE, SA

Hi friends..

Tarsos detector is my design.After l was retried interesting detector project.I started a few month ago..
l and my friend will help you
below link seem a fast coil adjustment but no fine tuning only fast and one hand working other hand hold the camera.
http://video.google.com/videoplay?do...65366081125948

download link http://www.savefile.com/files/1817529

before starting coil adjust all pot s will turn to left... 22k trim. high value .turn clock wise fully
detector sound will not comeing out in a moment on video decrease value 22k trimmer slowly until sound will come out and stop now turn to right disc. pot until sound will not come out. adjust fine tuning with geb pot.tarsos detectors working frq. 15,xx Khz tx amplutude 130vpp and upper
link below there are oscillascope views
l connected two multimeters rx point on pcb but ı read diffrent values?multimeter is false
http://video.google.com/videoplay?do...43699969438815

download link http://www.savefile.com/files/1818670

best regards ....... emekli AMCA(51)

[asenkron]

HELLO

tarsos tx 10 mh rx 11 mh turkey -asenkron

[ezberbozan]

Tarsos Digital VLF Dedector

hello all friends
this is my project vith Emekli Amca.
I transform Tarsos vlf dedector to digital.
tarsos digital is more tender and more stabil.
but projectis not complate.
I will declare to my projet again.
I wish to succes all.
video link : http://video.google.com/videoplay?do...54826631115083
............to be thanful to Emekli Amca................

[night]

Hi Tarsos

Can you tell me wich model of voltmeter do you use ?

Thanks
Greg

hii greg59 and all friends

emekli amca use voltmeter old radio-casette player vu meter .

and emekli amca yesterday did auto tune this video link http://video.google.com/videoplay?do...42071769749326
tanks.best regads

night...

[Friday]

hi...
this is auto-tune link by emekli AMCA....

http://www.savefile.com/files/1837049

[Unregistered]

Schematic have problems with ground balanse in discrimination and temperatur stability.
Work only in air.

[Friday]

Schematic have problems with ground balanse in discrimination and temperatur stability.
Work only in air.

did you make TARSOS?