2 boxxxx :)

[detectoman]

thanks to group,s members,prospectors inventors of geotech,heart youngs ,to you and yours , from mexico for your assistence to my questions , ok happines to yours

gracias a todos los prospectores ingeniosos del foro de geotech por ayudarme a resolver estos problemas si hay alguno que escriba en español por favor hagalo, dandome los consejos posteriores, para asi poderme explicar mejor acerca de mis dudas , les mando un saludo de hermana aficion y adelante, les deseo suerte"

y no rajeis hasta las seis"
detectoman

[detectoman]

unas fotos de mi primer dos cajas que construi

hello brothers i show in society , to yours my first two boxs these detector previous i probe only two times, if effective on one depp of one meter has sucess , is pending other test is very stable
is work whit one battery 9 v each box
the circuits is similar of svfiro and other owns modifications, and distincts functions of visual signal, these my two box face a face tx and tr in air reciver own signal to four meters
best regards to groups of members detectorist

detectoman

[Geo]

hello brothers i show in society , to yours my first two boxs these detector previous i probe only two times, if effective on one depp of one meter has sucess , is pending other test is very stable
is work whit one battery 9 v each box
the circuits is similar of svfiro and other owns modifications, and distincts functions of visual signal, these my two box face a face tx and tr in air reciver own signal to four meters
best regards to groups of members detectorist

detectoman

Hi detectoman. Bravo good work.
1. But as i see you must use short wires.Change the position of components so the connecting wires to be short.
2. Put the receiver pcb near the rx coil. The coil should be connected directly in pcb.
3. Try for better balance between coils so to give higher gain. With coils face to face you must receive the tx signal at 20 feet at least.
Regards

[detectoman]

brother geo

thanks for yours words to my, you have true reason, you,re experimented man, my congratulations, is veracity .,the large wires cause vibrations and instability, my detector is only experimental ,is my fhirst project,two box,is stable and the circuit is very short similar in comparationm whit svfiro, is not copy of svfiro , the circuit is design from of my investigation

geo te mando un abrazo y gracias por felicitarme , la verdad me gusta mucho esto de la electronica de investigacion,no estudie esto , pero me gusto saber acerca de la electronica y he hecho algunos circuitos diferentes, y he armado como unos seis detectores de metal, y todos me han funcionado, mas o menos bien,pero me gusta inventar y mejorar los funcionamientos, lo que no se es diseñar los pcb complicados y solo contruyo sobre circuitos impresos ya fabricados, alli los voy acomodando jejejeje
gracias por ser un aficionado a lo mismo que yo, espero me escribas a mi mail, que esta en mis datos de inscripcion
hasta pronto hermano y felicidades

detectoman
product of search for simplifiqued amplifiers

[detectoman]

here other project of my one bfo

this my bfo i modified, i nedd one effective shield for he, this bfo is very sensitive, deep in soil, of stones, 1.50m , whit sound of motorboat and sound silent, i like convert this circuit to discriminate , in other chasis , i am project this modifications , in future
detectoman mexico

[sergio]

adress incorrecto

Hey detectoman tu correo no funciona...

[goldfinder]

Detectoman BFO

Muchas Gracias por su Photographico Amigo,
That is one big coil for a BFO. I thot the BFO was a thing of the past. Would you please provide the modified schematic that you used. 1.5 Meter depth is impressive. I have digital signal processing background. Maybe you could use a PIC microcontroller for discrimination.

Do hot rocks and highly mineralized soil mess up the detectability?

Buenas Suerte su THing!
Goldfinder

[detectoman]

amigo sergio que bueno que hablas español, ya te mande un correo desde aqui espero te llegue sino, entonces te escribo desde mi mail directamente ok gracias me dices si te llego sino para mandarte otro correo, me dices de que pais eres, para platicar sobre deteccion y saber que experiencia tienes ok nos vemos sergio
detectoman jose

[detectoman]

friend goldfinger, mi schematic is the circuit refered in the panel of faraday shield , is the link of home clara , of six transistors, these y modified , i little, whit cap, of 100n and 100v, in the oscilators reference i put , 2n2222 and, induction coil big of 65 x40 cms, square, one detector whit deep power of 1,50 m is not one toy, is one project of my investigation, for competence whit others modern, i am very interesting in bfo for your economy and are simple, my problem is the extremely sentitivity and refect of capacitance whit ground, if i resolve this problem, my bfo is most actuality how pi or ib , i am apliqued too install one circuit for discrimination, in the future, whit pass band filters or other tegnics i think , is only one project for new born of these versatiles detectors, economical
excusme for my english , i no send diagrams internal of these bfo , they are very basics i am worry your see my work of beginer this is not pretty, how important is your function ok

regards goldfinger detectoman mexico
p,d what is finger?

[detectoman]

http://home.clara.net/saxons/bfo.htm goldfinger this is the link of circuit some of my detector , only whit modifications, and blind
detectoman

[sergio]

no mail detectoman

Hola detectoman yo soy de michoacan mexico y he construido varios detectores...No he recivido ningun email tuyo...
mi correo: [email protected]

[okantex]

to chemelec


Hi Chemelec,
what is the value of ?pF
and also coil size ,turn and wire number
type of buzzer ,and other construction parameters

could you add them to your page ,please?
and did you have any experiment with it.
about depth.
as he says detectoman 's serzirfo gets signal from 4 meters in-air
We wonders yours?
have a nice day

[detectoman]

as he says detectoman 's serzirfo gets signal from 4 meters in-air
We wonders yours?
have a nice day
brother okantex., my detector is not the serzirfo, is other similar what i modified, the serzirfo is of most power signal, @ 20 feet,(six meters) in air, box to box, of front, these diagram svzirfo, is very extense,is big, the my is little and other owns,components, is my project proto, is not closed these modifications

regards brother okantex have you very nice day

detectorista detectoman

[okantex]

a question about two box circuits
İf I change L value of both coils ,can the circuit work ?
or same L value but too close location of coils.I want to put them in 10cm*20cm rectangular positions.by using u cores for reciever and iron core for transmitter.
waiting especially engineer friends opinions
thanks all

[chemelec]

a question about two box circuits
İf I change L value of both coils ,can the circuit work ?
or same L value but too close location of coils.I want to put them in 10cm*20cm rectangular positions.by using u cores for reciever and iron core for transmitter.
waiting especially engineer friends opinions
thanks all

Typically Changing the Inductances isn't a Problem, But it will change the Frequency.

However I really Doubt a Ferrite core is practical.
And Definately Not an Iron Core.