Concentric PCB-Coil

[Aziz]

I am using a concentric PCB-Coil (ca. 20 cm diameter) and had phantastic measuring results:
- very low temperature dependency
- very thin dimension (ca. 3 mm)
- very easy to build (just making a pcb-board)
- no balancing needed (computer designed geometry - thus automatically balanced)
- most of the area is for the rx-coil
- combined small rx and big rx-coil (due to the geometry, the rx-coil is a spiral from the inner side to the outher side)
- bigger transforming effect (nummer of turns for rx-coil is much more then for the tx-coils), to reduce the gain of the amplifier, thus reducing also noises of the amplifier.

Therefore, it is very sensitive even to small metal objects (nuggets). To achive this, it was a very hard and long job.

If you interested, may be I can put the pcb-board for the search coil here. Please ask me.

I am now working an a new PCB-Coil, same size but lower inductance (tx-coils), bigger rx-coils, lower parasitric capacitance, single side pcb (the prior art was a double sided pcb-coil ;-) ).

Aziz

[capela]

Re: Concentric PCB-Coil

Hello Aziz, could you send me the drawings of the PCB coil please, because i´m plan to build one as yours ?

thanks
capela

[Al Arens]

Re: Concentric PCB-Coil

OK, I would like to see your pcb's.
Thanks, Al.

[Aziz]

Re: Concentric PCB-Coil

I cannot post the pcb-image.
Its too big (700-800 k Gif-file).
I get error message!

I´m sorry.
Aziz

[capela]

Re: Concentric PCB-Coil

Hello Aziz, that is not too big my friend, if you use WinZip or WinRar, you can make it smaller, are using a 56Kmodem or ADSL ?
Do you have another mail box ?

thanks.

Capela

[ludmil barossov]

pcb coil

hallo aziz

my name is ludmil barosov.
i am from bulgaria
my e-mail [email protected]



is it posible to send me shematic of your pcb coil?
what program do you use to build this coil?
i am using PROTEL for my pcb.
can buil this coil on protel?



best regards :barossov

I am using a concentric PCB-Coil (ca. 20 cm diameter) and had phantastic measuring results:
- very low temperature dependency
- very thin dimension (ca. 3 mm)
- very easy to build (just making a pcb-board)
- no balancing needed (computer designed geometry - thus automatically balanced)
- most of the area is for the rx-coil
- combined small rx and big rx-coil (due to the geometry, the rx-coil is a spiral from the inner side to the outher side)
- bigger transforming effect (nummer of turns for rx-coil is much more then for the tx-coils), to reduce the gain of the amplifier, thus reducing also noises of the amplifier.

Therefore, it is very sensitive even to small metal objects (nuggets). To achive this, it was a very hard and long job.

If you interested, may be I can put the pcb-board for the search coil here. Please ask me.

I am now working an a new PCB-Coil, same size but lower inductance (tx-coils), bigger rx-coils, lower parasitric capacitance, single side pcb (the prior art was a double sided pcb-coil ;-) ).

Aziz

[nelson]

I am using a concentric PCB-Coil (ca. 20 cm diameter) and had phantastic measuring results:
- very low temperature dependency
- very thin dimension (ca. 3 mm)
- very easy to build (just making a pcb-board)
- no balancing needed (computer designed geometry - thus automatically balanced)
- most of the area is for the rx-coil
- combined small rx and big rx-coil (due to the geometry, the rx-coil is a spiral from the inner side to the outher side)
- bigger transforming effect (nummer of turns for rx-coil is much more then for the tx-coils), to reduce the gain of the amplifier, thus reducing also noises of the amplifier.

Therefore, it is very sensitive even to small metal objects (nuggets). To achive this, it was a very hard and long job.

If you interested, may be I can put the pcb-board for the search coil here. Please ask me.

I am now working an a new PCB-Coil, same size but lower inductance (tx-coils), bigger rx-coils, lower parasitric capacitance, single side pcb (the prior art was a double sided pcb-coil ;-) ).

Aziz

Hi, i have build the Clone PI MD and is woking fine, but i need to construct the best search coil for this machine. I m interested on coins. By now i can detect a 2 cms copper coing at 16 cms on free space.
Any haelp will be appreciated
In advance many thanks
Nelson
[email protected]

[Lake]

Hello Aziz,
Is this your coil? Wow..
http://ibcoils.tripod.com/album/wien2.GIF

[kt315]

> Hi, i have build the Clone PI MD and is woking fine, but i need to construct the best search coil for this machine. I m interested on coins.

the photos were shared of a people (are not mine!!)
http://www.technoid.front.ru/photo/1.jpg
http://www.technoid.front.ru/photo/2.jpg
http://www.technoid.front.ru/photo/3.jpg
http://www.technoid.front.ru/photo/4.jpg

still one site on Clone PI
http://www.f-burn.ru/clonepi/index.html

[bobsyn]

I am using a concentric PCB-Coil (ca. 20 cm diameter) and had phantastic measuring results:
- very low temperature dependency
- very thin dimension (ca. 3 mm)
- very easy to build (just making a pcb-board)
- no balancing needed (computer designed geometry - thus automatically balanced)
- most of the area is for the rx-coil
- combined small rx and big rx-coil (due to the geometry, the rx-coil is a spiral from the inner side to the outher side)
- bigger transforming effect (nummer of turns for rx-coil is much more then for the tx-coils), to reduce the gain of the amplifier, thus reducing also noises of the amplifier.

Therefore, it is very sensitive even to small metal objects (nuggets). To achive this, it was a very hard and long job.

If you interested, may be I can put the pcb-board for the search coil here. Please ask me.

I am now working an a new PCB-Coil, same size but lower inductance (tx-coils), bigger rx-coils, lower parasitric capacitance, single side pcb (the prior art was a double sided pcb-coil ;-) ).

Aziz

Hello Aziz, could you send me the drawings of the PCB coil please, because i´m plan to build one as yours ?

Tank you
[email protected]