Picked up my Fisher CZ-3D today finally!

[TheGeorgiaCanuck]

Will be testing it using the settings for air tests posted on NASA Tom's forum. Will report how it responds.

 

[TheGeorgiaCanuck]

Rough test air: discrim 0, volume 5, Sensitivity 10, GB 10

Dimes: 9-10"
Nickels: 9-10"
Quarters: 10-11"
50 cents: 12-13"
Large Cents: 11-12"
Loonies: 11-12"
Toonies: 12-13"

Will make me up some proper measured paint sticks with the coins glued at depth and film it soon.

 

[TheGeorgiaCanuck]

Canadian Coinage, bronze, copper, clad and silver. ALL rang high tones.

 

[88junior]

Sounds like a pretty hot 3d you got there good luck with it and let us know how you do in the field!

 

[HaroldILL.]

If you want to do a proper Dankowski test leave everything the same except set your sens. to 4.8 and then do your air test. Even though the super hot ones hit a clad dime at 12'' with prorper I.D. and high tone,If it can do it to at least 10'' I would be happy with it. By the way is this a new unit?

 

[TheGeorgiaCanuck]

If you want to do a proper Dankowski test leave everything the same except set your sens. to 4.8 and then do your air test. Even though the super hot ones hit a clad dime at 12'' with prorper I.D. and high tone,If it can do it to at least 10'' I would be happy with it. By the way is this a new unit?

Yes it's a new unit and I was going by what was posted on his forums. But I'll retest soon with your advice.

 

[tony369412]

congrats on the cz3d

 

[TheGeorgiaCanuck]

If you want to do a proper Dankowski test leave everything the same except set your sens. to 4.8 and then do your air test. Even though the super hot ones hit a clad dime at 12'' with prorper I.D. and high tone,If it can do it to at least 10'' I would be happy with it. By the way is this a new unit?

Yes it's a new unit and I was going by what was posted on his forums. But I'll retest soon with your advice.

Rough measurement air test: discrim 0, volume 5, Sensitivity halfway between 4 and 5, GB 10.

Dimes: 10"
Nickels: 10"
Quarters: 11"
50 cents: 11-12"
Large Cents: 10"
Loonies: 10"
Toonies: 10"
Silver ring(normal mans): 11"
Gold ring(small 18k mans wedding band): 10"

ID Meter readings, All high tones unless otherwise posted:

Canadian silver dimes ID on the line between zinc penny and larger coins.
Canadian nickels(non-silver) 1947 ID's just over the line between 5 cents and Zinc. A 1950 nickel read as a square pulltab with a medium tone. A 1965 nickel read same as the 1947. 2009 read as square pulltab.
Canadian old pennies ID just on the line between zinc penny and larger coins. New pennies read as zinc.
Canadian old quarters(silver) ID just over the line between zinc penny and larger coins. Modern quarters 2009 rang up as a round pulltab with medium tone.
Canadian 50 cent piece 1985 ID'd just over the line between 5 cents and Zinc.
Candian large cent 1919 ID'd just over the line between nickel and 5 cents and Zinc.
Silver ring .925 ID'd on the line between zinc penny and larger coins.
Gold ring 18k ID'd as 5 cent.

 

[HaroldILL.]

Sounds like you got a good one. I would leave it alone if I were you as I don't think it needs recalibration.

 

[TheGeorgiaCanuck]

As I'm new to the use of this machine, I've been out with it two times now as of today. I've a few questions if you don't mind answering them.

Settings:

GB with the bouncing the coil while adjusting the GB control.
Volume: 5 to hear the soft high tone on deep targets
Sensitivity: 6
Discrim: zero

I've dug some iffy signals and they always turn out to be nails. Lemmie describe them.

High tone, on and off with iron grunts. I turn 45deg and either I get the same or it goes to all iron tones. Am I correct in assuming that when this happens it's a nail always?
If it's a coin with a nail in the hole I *should* get a good high tone in any direction right?

Almost every iron/nail I run across causes a high tone beep while swinging. Am I falsing alot? Should I run my sensitivity lower? The machine is GB'd good.

 

[cometguy]

You are asking some of those questions that you can only answer yourself. Once in a while that iffy signal will turn out to be something amazing cleverly hiding with iron. A lot of times it will be junk or nails. i change my style a little depending on where I am hunting. If I am hunting in a farm field, I dig those iffy tones and see. In a nice yard I might let them go. A lot of people run their sensitivity just a little lower than you do. You might try coming down to 5. I notice I get more falsing if I swing too fast or don't keep the coil flat on the ends of the swing. You will find a few targets that will hit from all four sides and not be good but they are very rare. Digging is a little like gambling. You have to decide which chances to take and which ones to pass on. The CZ puts the odds in your favor on those positive beeps. Good luck, and let everyone know how you are getting along.

Don
HH

 

[Steve O]

Same thing here GC. I have found that 98% of the time when there is a high tone some of the way around the target, then iron lows, it's iron/nails. What I do is pinpoint the target to get the center of the coil over the target, then circle. If I get a couple of iron grunts it's a nail/iron. If it's high tones all around with a nice "ting", I smile and dig. I have dug hundreds of nails with the CZ to come to that conclusion. Don's advice is from experience as I'm sure he has dug many nails to come to the same deduction. The iron falses have more of a "washed out high tone" verses a "high ting" sound of a coin/non ferrous target. Check the meter along with the high tings also. You will notice the needle doesn't always peg out to the right, but is still in the coin range. Like Don says, the CZ puts the odds in your favor but you have to dig to learn your machine, and once you learn it the less trash you'll dig.