5'', 8'', and 10.5'' coil compaison for CZ 3D Graphs air tests

[Brawler_7]

Hi everyone,

I did some air tests on my CZ 3D using all three available coils (5''/8''/10.5'') and plugged the results into an Excel spreadsheet to make these three pretty neat graphs! I used the following settings:

Sens. 6
Vol. 5.5
Ground 10
All metal mode (not auto-tune)

The test objects are listed on the graph, but some of the larger objects don't have very good description. I can add more info about them if people are interested. I think i will probably just take a picture of the larger objects and post them later. I triple checked the results by retesting over and over again, and did the tests on different days so the numbers are right. I guess my CZ is not at hot as some other ones i have read about, although it does have 1021 serial number.

I wish i had the 12.5 Sunray coil to test, if anyone does have one i would be very interested in a comparison between the 10.5'' and 12.5'' coil. Dankowski wrote on his forum that there is virtually no difference between the two. Last thing to note, although not in this graph, there is a huge difference in depth (about 3 inches for coins) between a sensitivity of 4 and 4.5, and no additional depth from 4.5 and above, the signal gets a little louder but the detection range does not increase at all.

Here are the graphs:

[attachment 135183 Parabula2.jpg]

[attachment 135182 BarGraph.jpg]

[attachment 135180 Liniar.jpg]

Hope you guys like these,

Brawler

 

[mazarelo]

Nice job. I just picked up a CZ70 with the 5, 8, and 12" coils. I'll have to try
to post something like this.

 

[Bill_S]

Neat charts...Thanks.

 

[Dan-Pa.]

More appropriate to do these in Disc. mode as few hunt in all metal and if I did would use autotune as seems like your coverage is widened in auto tune.Either way a noisy mode which many would shy away from lest they get an Excedrin headache, Certainly respect Tom's opinions but using both I know the Sunray 12 was deeper and certainly coverage was indeed increased. Taking into consideration many factors all units are not equal but certainly good ballpark numbers...

 

[joe dirt_1]

nice work, i'm also curious as to how these charts would compare to my cz70 with all three coil sizes. probably very close to the same depths i would guess.

 

[Brawler_7]

I agree, Dan-Pa, fortunately in discrimination mode the depth was the same. If i hunt in auto-tune i can't hear the tones, it all sounds the same, but in all metal i can just listen to the tones and dig the mid-high ones, so if there is iron involved, i can usually tell if it's trash or not.

Anyone want to do their own air tests and post them. It seems like the only air tests i have come across are made by companies trying to promote their own equipment. On the Nexus website they have a lot of good data, but can i really trust it? Who knows.