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I think my CZ-3D has a problem

A

Anonymous

Guest
Guys,
I just bought a 10.5 in. coil for my 3D. I wanted to test the difference between the 8 and the 10, so I buried some coins. I buried a dime at 12", a dime on edge at 8", a nickel at 8", a penny(non-zinc) at 6" next to a nail. The 3D detected <FONT COLOR="#ff0000"><BIG>NONE</BIG></FONT> of these with either coil on <img src="/metal/html/shocked.gif" border=0 width=15 height=15 alt=":shock"> . So, I buried a dime at 6" and couldn't detect it either. I tried air testing and would lose the dime at about 7-8". I re-ground balanced numerous times (bobbing method). This is in clay soil.I tried turning up the sens. to 5-6 with some improvement in air testing. But everybody knows that you can't hardly hunt with the sens set higher than 4. I could find a dime on edge at 2" but it pinpointed the depth at 4"
I have been finding coins of late but none past 4". I've been thinking that none in my area were deeper than that but now I'm not sure. I have been working an old site so there should be older coins here. I have found them back to 1892 (3") but this site dates back to 1820.
I'll be calling Fisher on Monday to talk to a tech. I think I'll be sending it in for a tune-up. Let me know if you think I have a problem.
Thanks,
Dave
 
Any detector will have trouble finding freshly buried coins. Coins need time to build a target halo around them in order for the machine to see it better. It could also be your soil. Which ground balance method are you using. I found the one that holding the pinpoint button while you lower the coil to the ground and made adjustments the better one.
 
I use the bobbing method. I've been told by many people that it is the better method. I GB'ed it many times. I also just set it to it's preset of "5". I've never GB'ed with the pushbutton method. I have found over a thousand coins with this thing in the last year. But when I think about it, I've never dug a coin over 7". In the last 2 months, I haven't found a coin past 4". 95% of the coins I've dug since I've owned it has been less than 4". I know that this machine is capable of better performance. I never really tested it with a "coin garden" before.
Dave
 
If you have another coil I would air test both and compare the result. My 8 inch coil has a flexure short in it right at the top. If the cable is pulled a certain way it miss ID's everything. I need to return the coil and get them to check it. I don't know if it's similar to your problem or not.
-Bill
 
Bill,
I tried the 8 and the 10.5, they both act the same. Mine IDs just fine, it just doesn't seem to have much depth. I noticed the other day that it was telling me coins were deeper than they actually were. It has always been pretty accurate with that. I re-GB'ed.
I found a Merc. and 2 wheats on my last trip right in an iron minefield <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> . But none of them were over 2" deep.
I'm going to play around with it a little more this weekend to see if maybe I'm not doing something wrong.
Thanks for the suggestions. Keep them coming.
Dave
 
are exactely like mine. I Started out with the 3D and now use a 5. Just dont seem to come up with many coins in the 5"-7" range. My opinion is in my area the CZ is giving the deeper coins the high coin iron bounce, and i dont think thats a very productive way of hunting trying to dig every deep signal that reads that way. I have the 5,8 & 10" coils and never found one to go deeper than another. Love the machine but but not the depth. Brian
 
He had a 5 or 6 old silver dimes from where I had hunted, he said they were deep, I had a bunch of 3 inch clad. I now own a SovElite.
 
Brian,
I hope you're not right. If I dug every hi coin/iron bounce, I'd never get up off my knees <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> . The ones I have dug have been iron. I'm not going to panic. I'll wait until I get in touch with Fisher before I panic. I do hunt in iron a lot. I hunt around 100 yr old house as my main sites.
Brian, have you found deep (7" and up) coins since you went to a CZ-5?
Thanks,
Dave
 
I can get quarters in the sand at 12", but not on land. My deepest was a merc at 6-7" and it was just a faint whisper. usually run GB @ 3 and can turn the sens. up as much as i want without falsing. Got an 11 & 49 wheat today and they weren't a solid high tone. It was kinda half and half on the readings (high coin/iron ). Brian
 
Well your CZ has a problem or there is something else in your settings that's going on. While you simply cannot replicate any ground conditions with coins you've buried, air testing is much more telling. Losing the dime at 7-8" on air test is not good. Get it checked out and let us know.
 
An old timer at this detecting business told me that the proper way to bury coins for a coin garden is to put the spade/ shovel/ whatever you use, into the ground at something like a 45 degree angle - one "slit" into the ground - then pack the dirt down and wait about a week for a halo to build up before trying to detect the target.
Try it and see if your results change. Sure hope you don't have a problem.
HH, Jim
 
Sounds like you're having great results! Good for you!What kind of ground (soft, plowed, chirt, clay?)are you finding these deep targets in and which detector?
Jim
 
Actually, I hope I do have a problem. I hope my air test results aren't really how it's supposed to perform. I think it should be better.
I've read a good bit about the "halo" idea and have seen it debated on here. I think iron and copper do develop a halo but if silver develops a halo at all, it would have to be minimal. The halo is from the metal itself leaching out into the soil or rust and corrosion forming on the coin(I know most of you already know this) and I can't imagine much silver leaching out. Just my opinion.
Dave
 
And I also believe it take quite a while for even iron or copper to have a halo, it just don't happen in a couple of days time. And I'm not even sure halo, is the reason, that is also debatable.
 
You're correct as I understand the phenomenon - halo around copper and clad,etc, not silver. The coin garden "planting" method was told me by a 40 year veteran of MD'ing and he sells every brand of MD's today.
HH, Jim
 
add a bit of salt to the hole, it will happen REAL fast!!!!
 
On page 25 of Fisher Intelligence 4th edition under the heading A "REAL WORLD" CZ-3D CHART states: The CZ-3D is a poor performer in an air-test. In fact it may fail a few specific air-test scenarios. The CZ-3D is designed with the real-world dirt matrix variables in mind. Since Thomas Dankowski designed the machine, I hope this may help explain your results as well. I have a 3D but I still find myself going back to my CZ-70 since I trust what it tells me whereas with the 3D I'm still trying to figure out it's language...HH
 
Chris,
I just re-read that last night. I talked to a Fisher tech today and he said that the machine would perform best in an air test. Any dirt in the way would just make it worse. <img src="/metal/html/shrug.gif" border=0 width=37 height=15 alt=":shrug"> I've never heard anyone but him say that. But he works on them daily.
He's going to air test a few 3Ds the way I did and let me know the results.
Have you ever compared your 3D and your 70 in an air test?
Dave
 
Dave,
I've never tested the 3D versus the CZ-70 in air-tests as of yet. I have taken both with me out in the field and first hit the area with one then the other. I did find an 1867 IH the first time I used the 3D that I walked over with my CZ-70 many times. I did try the CZ-70 versus my buddy's DFX in the field and it solidly outperformed the DFX in particular with deeper targets more than 4 inches. We also later tried my CZ-70 versus my C$. I have to say that the C$ was much deeper which freaked me out. I watched my DFX buddy blow me away with it. He dug an 8 inch roosie that I couldn't hear. He later pulled a 10 + inch wheatie that I never heard. I guess each machine had its advantages and disadvantages particularly with the advanced user.
Chris
 
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