CZ70 Ground balancing question

[Cal_Cobra]

I'm new to the CZ world and have been using a CZ70 for the past couple of months, and so far I'm really enjoying it.

For the most part it's a simple and straight forward machine to use, but I had one question concerning ground balancing.

I've noticed several times that when ground balancing that there's a fair amount of 'gap' (silence) between the positive and negative adjustment. What I'm wondering is if your better to adjust it closer to the positive or negative side for better depth ? Or is the difference so insignificant, it's a wash?

Thanks,
Brian

 

[gmanlight]

Hi Brian i might be wrong but i think if you turn your sen to 10 and GB in all metal then turn it down to normal setting . Good Luck Mike

 

[BJ in Okla.]

Cal,
Below is a copy and paste from Mike CZ site...
Here, on a CZ our ground will bal. from 4.5 to 6.5, most of the time "5"...
I think, it is better to be a little Pos. than Neg.
I think I read some where that if the GB is to far off, makes iron sound better...
HH...BJ




Mike Va writes
The Bobbing Method of Ground Balancing:
Note: Use headphones to do this

 

[Cal_Cobra]

Thanks BJ, that's good information. It's interesting that the CZ70 manual doesn't indicate (unless I missed it) to set the sens at 10 when setting the GB.

I've noticed at times there's a fair amount of play/slack between the neutral zone of the negative and positive GB setting, so I was curious if it was better to set the GB more near one side or the other for better performance (depth).

So far I'm really liking the CZ70, even better then some of the new Fisher digital units, I wish I'd tried the CZ70 sooner, it's a keeper

 

[christopher-ohio]

I use the pushbutton method in normal mode, sens. 4 or 6, ID and it works fine. I've done it this way for years and it takes me just a few seconds. I've tested my method with Mike Va himself at a site and we got the exact same GB level. I've talked to Tom Dankowski himself about this as well and he said it's fine to do that since most of my sites have so much iron it is practically impossible any other way...HH

 

[BJ in Okla.]

Most of our soil will GB from 4.5 to 6.5, when I can not find a clean spot to GB, I just put it on 5 and hunt.
I have hunted with some that never GB, they just put it on 5 and hunt...
HH...BJ

 

[BJ in Okla.]

One time I was hunting with my CZ 70 and 8" coil. Sens at 4 or 6.. Zero Disc., I want to hear the iron.
I got a 4 way hit, high tone, coin sound, I went to pin point, and nothing, so I did not dig it.
I was told later that it might have been a deep coin. I know some units will go deeper in disc mode than PP mode.
I will never know what it was....
HH...BJ

 

[Cal_Cobra]

One time I was hunting with my CZ 70 and 8" coil. Sens at 4 or 6.. Zero Disc., I want to hear the iron.
I got a 4 way hit, high tone, coin sound, I went to pin point, and nothing, so I did not dig it.
I was told later that it might have been a deep coin. I know some units will go deeper in disc mode than PP mode.
I will never know what it was....
HH...BJ

I set mine up with zero disc (I like to hear the iron, and I understand it falses less this way), and sens of 4 seems to be right on this machine (6 gives quite a bit of falsing, although it may be a bit deeper?). I don't have the 8" coil, so I've mainly been hunting with the 10.5" coil. The mineralization in Northern California is all over the map, I've had GB settings from 9 to 4, but mostly they seem to land around 5.

That's good to know on the PP discovery. I saw that exact same phenomenon a few times recently and figured it was probably iron, and moved on. Next time I hunt and see this, I'm digging.

Thanks and HH,
Brian

 

[christopher-ohio]

in most situations. The GB is forgiving on CZ's. True optimal GB is ideal for maximum depth, stability, and performance but the reality is the ground changes all the time anyway when hunting in the same spot...so hairsplitting accuracy is only good for that spot of ground and maybe not the one just a few feet away.

Yes, some don't want to bother with GBing at all and do very well on 5. Here, the GB is usually around 3 or so. Take care and HH.....Chris

 

[BJ in Okla.]

I went back and tried to find that spot the next day, no luck, it was a old ball field...
If you don't hip mount and swing that big coil, is one arm bigger than the other ???lol.
HH...BJ

 

[Cal_Cobra]

I'm used to heavy machines, I have the Coinstrike with the 10.5" coil and the Sovereign with the 12.5" coil, their built like tanks, but heavy like tanks.

 

[Dan-Pa.]

Use the bobbing method and set the sens. to 10 and the volume to 10 so you can clearly hear the differences, when done set them to your preference.
To use 5 all the time is for newbies and a properly set ground balance will increase the depth and stability.
Set slightly positive in average ground will give a tad more depth((in other words unit sounds off slightly when you bob towards ground..most balance to little or no change which the manual indicates.
On saltwater beaches just might get some more stability if you set a tad negative( sounds off slightly when you bob up from the ground).

 

[BJ in Okla.]

How do you like the Coin Strike ?

I just got a new one and also got the 6" coil for it, have not had a chance to use it yet.

I also have the Edge and 6" coil, love it.

The Edge and CZ play together nice.

I have a couple of friends that use the CZ's, so I want something different to use with them, love my CZ's...
HH...BJ

 

[BJ in Okla.]

You are talking about doing the Bobbing in Auto-Tune, right ???

The only time I use "5" is when I can not find a clean spot to GB.....

I have 2 friends that put the GB on 5 and hunt, they make some darn good finds, but most of our soil will GB at 5.

HH...BJ

 

[Cal_Cobra]

How do you like the Coin Strike ?

I just got a new one and also got the 6" coil for it, have not had a chance to use it yet.

I also have the Edge and 6" coil, love it.

The Edge and CZ play together nice.

I have a couple of friends that use the CZ's, so I want something different to use with them, love my CZ's...
HH...BJ

BJ I have the C$ and the Edge, although the Edge is a recent addition. I've logged 100's of hours on the C$, and in my area it's a mixed bag. It has lots of features, and lots of potential, but sometimes it's a challenge to get dialed in. My main issue with it is that EMI kills it's performance, and we have plenty of EMI out here. I've had it at places where it was unusable due to the EMI. Once I met up with another hunter in Monterey who was using an Explorer. We hit a sidewalk demo, and his Explorer was running fine, yet the C$ was streaming digits across the screen and spitting out tones a mile a minute, didn't matter if the coil was on the ground or in the air, and the sens as low as it would go, it simply wasn't usable due to some kind of EMI that the Explorer was handling just fine. We went to the beach and it was OK, but later hit an old ball field and again it was pleagued by EMI, although not quite as bad as the initial time.

The Edge is far better at handling EMI, less options to fiddle with (which could be good or bad depending on your perspective), but lacks ground tracking and the backlit LCD (although oddly they advertised it as such). It's so easy to GB I don't care about ground tracking (don't get me wrong, it's a nice feature to have), but the backlit LCD would be great for night hunting. The Edge and C$ are equal in depth, the Edge is 3/4 lbs lighter which is welcome, and you can use the C$ coils on the Edge via the Sunray probe which has an Edge/C$ toggle on the box.

That's about all I can think of at the moment. Don't get me wrong, if the C$ works well in your area, you'll have a nice, deep machine, but if you already have the Edge, you may not see much benefit to having a C$ too.

hh,
Brian

 

[BJ in Okla.]

That's nice to know.
Last Sunday, I hunted with a friend that used the old Fisher 1260x and when he got close, the 1260 drove my Explorer ll nuts, we are talking about 2 feet, I had to hit the noise cancel...
I hunted with me Edge and another friend with a E-Trac that went nuts, he thought it was my Edge, I turned the Edge off, the E-Trac was still having problems, I looked up and we were under some Elect lines, he moved on, I turned my Edge back on and stayed under the power lines with no problems...Its nice to have more than one detector....
Thanks for the info.
HH..BJ

 

[Cal_Cobra]

I was reading a site that compiled a list of CZ tips (http://66.51.97.78/coinist/cztipspage1.html) and saw this interesting post about using a positive GB.

Unfortunately it doesn't saw what using a positive GB will do for you?? I assume better depth, but wonder if increased falsing will also occur and if you would obtain the same depth increase by setting the sens to 6 on the CZ70 (mine falses after 4 where I've tried it so far). I'm also wondering if you guys are doing the bobbing GB with the sens set to 10, and then changing it after it's GB'd, if I might be able to run it at 6 with less (or no) falsing. I'm going to take it out tomorrow to an older park and play around with some of the settings.

Here's the post from the CZ Tips Page:

"Positive Ground Balance When running positive, the threshhold increases very slightly as the coil approaches the ground. After tuning the GB to obtain no change in threshhold while bobbing the coil, you turn the GB knob on the 7a/7a Pro counterclockwise (toward 1) to achieve a very slight threshhold when the coil approaches the ground. Not having used a CZ 5, 6, or 6a, I'm not sure, but I believe the GB control is the opposite of the 7a/7a Pro. So, you would turn it clockwise, towards 1. I'm not sure about the pushbutton method, but I'd assume you would tune the GB to have a very slight threshhold, instead of total silence. Hope this helps. Ron (WV) Posted on the Fisher Forum July 9, 1999 "

hh,
Brian

 

[BJ in Okla.]

I don't remember, but a friend told me that he thought that CZ's were backwards from other detectors, the smaller numbers were more Pos.
I have used both ways to GB and also just put the GB on 5 when the area was to trashy to GB, our soil is 4.5 to 6.5...Seems to work just fine.
I tried playing in in a test spot one time with GB, but did not take notes, if you have some planted coins, you might try different GB settings and see if it changes anything. Seems like if the GB is off, rusty nails sound better...
Here our coins are not all that deep, most of the time.....
HH....BJ

 

[Mike (Virginia Beach)]

That's pretty much correct Gman.

Here's something I wrote up years ago and posted here a few times. It has been helpful to many, as the manual I think doesn't really do a very good job of explaining it. Maybe there's something here that will help somebody.

Mike

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A lot of folks frequently ask the question

 

[Cal_Cobra]

Thanks Mike. I have the bobbing GB down pat, but was mostly curious if when you had a large gap of silence between the positive and negative GB when doing the adjustment if you would get more depth by moving the GB dial towards one direction or the other. Nasa Tom indicated that if you go to a positive GB, you can pick up a bit of extra depth, but (there's always a but isn't there?), at the cost of potential falsing or iffy TID.

Thanks,
Brian