need some advised from coil experts:help:

[SEMPERFI61]

just got the new cibola. looking at two coils : 11" round concentric widescan search coil vs. the 12x10 spoked search coilalways heard that the concentric coils were always the deeper coil.is the widescan a d.d. coil?both coils made by tesoro .would appricate the feedback -------thank you.----------------------------bill.

 

[amberjack]

MHO stick with stock coil til you get the hang of the machine.

concentric is a mono coil bit easyer to pinpoint

widescan is a DD coil bit more sensitive

AJ

 

[fwcrawford]

On the two coils you are talking about... the 10"x12:" widescan coil and the 10"x12" spoked concentric coil.
One is a widescan or DD coil and the other is the concentric coil.. two different detection fields.
The 10"x 12" concentric will not work on the Cibola since the connector has 5 pins and the coils for the Cibola have 4 pins in the connector.
The five pins connector coils are for the

 

[Fishers Ghost]

MHO stick with stock coil til you get the hang of the machine.

concentric is a mono coil bit easyer to pinpoint

widescan is a DD coil bit more sensitive

AJ

Just a quick note:
Concentric coils on a vlf detector are not Mono.( mono means One)
The concentric coil consists of two windings with one wound inside the other and donot overlap in anyway. Like a wheel within a wheel.

Mono coils are use with Pulse induction detectors where one winding is the TX and RX.
Some PI detectors do use a seperate winding for TX and RX and are wound in a concentric fashion.

 

[BJ in Okla.]

The Cibola and Vaquero coil is Monolithic ( Carbon Fiber ),,,in your manual, at the back....

A process for preparing an activated carbon fiber composite material includes the steps of mixing carbon fibers, binder and water to form a slurry, molding the slurry to produce a green monolithic body, curing the monolithic body, carbonizing the cured monolith to produce a carbon fiber composite with an open, permeable structure and activating the composite. If pre-activated carbon fibers are utilized in the mixing step the carbonizing and activating steps are eliminated.


right ?????
BJ

 

[magglobe]

so what's a spiral printed? Since the sand shark is a P.I. unit and the coil is not mono but spiral printed...

 

[Ism]

Its a coil etched out of a circuit board. Its a very reliable way of making a flat spiral would coil.

 

[Fishers Ghost]

Monolthic refers to the coil housing material . A mono coil is a coil of 1 winding. Concentric is 2 coils wound in the same plane but with one winding inside and of smaller diameter than the outer winding. A DD coil has two windings but they each overlap in a D shape at the centre of the coils. The windings are generally positioned sutch that there is zero voltage induced into the RX winding until a metal target upsets the electromagnetic balance of the coils.

The sand Shark printed spiral coil is a mono coil that differs from a conventional wire wound mono by the fact that it consists of an printed/etched copper spiral.