Question about searchcoils....

[jbow]

I posted this in the relics forum then I realized that I probably should have posted it here.

My understanding is that a searchcoil is basically two loops of wire, encased in resin or plastic. One loop to send and one the receive.

What is it that makes searchcoils so that you can't modify the connection and use any coil on any machine. I know that coils on the Exterra series are for specific frequencies, but what determines that? Is it the number of turns in the loop?

Would it be possible to adapt a good coil like the Minelab "Pro coil" to work with a Sovereign or a Whites V3 ?

Some people make their own coils so i'm thinking maybe a coil could be adapted for a diferent detector...

Anybody know?

Thanks,

Julien

 

[AUDuke]

Have you ever tried to put a Toyota transmission in a Ford?

 

[avel]

coils should be all made to fit all detectors. But you know that this is not done because of manufacturers wantingto make money. metal detector work at designated frequencies. The number of wire turn on the coil and the type of wire used will determine the frequency in khz. The higher the number of turns lower the frequency. Of course this is a short layman explanation.

PS; I want to use my cz6 but i cannot because i do not have a coil for it. Where can i get one?

 

[silversmith]

Have you ever tried to put a Toyota transmission in a Ford? No, but I once put a loaded 327 chevvy engine with Muncie transmission in a Mustang. It was never beat on the streets of Fresno. Does that count?

 

[jbow]

n/t

 

[jbow]

what about BBS or FBS? It seems like maybe those coils could be made to use with any machine since they cover all the frequencies, is that a possibility or no?

Thanks,

Julien

 

[jbow]

n/t

 

[UK Brian]

The reason FBS and BBS don't rule the roost is that in most cases its better to have a coil that is optimised to the detector. One of the European detector manufacturers was able to get the old Minelab advert with the arrows going into the ground...one frequency going down a small amount, two frequency a bit more and multifrequency much further, withdrawn. The exception is on salt wet sand where two or more frequencies does pay off.

I found the V3 had the same problem as the DFX. On most land sites you were better using one frequency rather than three.

Re the SEF. Large is heavy and the 10 x 12 is only a fraction deeper than the Pro coil. If you have the Pro coil why spend extra ?

 

[Old_tex]

coils should be all made to fit all detectors. But you know that this is not done because of manufacturers wanting to make money. metal detector work at designated frequencies. The number of wire turn on the coil and the type of wire used will determine the frequency in khz. The higher the number of turns lower the frequency. Of course this is a short layman explanation.

PS; I want to use my cz6 but i cannot because i do not have a coil for it. Where can i get one?

If you know the operating frequency of your detector (cz6), a good start would be to try to match it to another manufacturer's unit, which operates at the same frequency. Of course, circuit components in the oscillator's tank circuit are the variable. You probably can't get a schematic to verify component values are oscillator configuration (i.e. Colpits, Hartley, etc.) but knowing the operating frequency would be a good start. Of course, you would have to also identify the search coil's connections - transmitter coil and receiver coil. Old_tex