cz 21 and iron...

[borntofli]

I need a water detector and have iron problems here.... I dont want to dig iron....... In disc does it just ignore iron like an excal or sov or give a different tone....

Also are the sounds for targets different pitch for conductivity??? I have a sov gt and have tons of sounds, is the cz similar??? Or is is more of a low-med-high as to conductivity?? There are not many videos of it in action to get a feel for what different targets sound like......

 

[therover]

The CZ21 has 3 tones. Low for iron, med for foil/tabs/gold, high for nickel ( and gold targets in the nickel conductivity range) and clad/silver.

It has several levels (linear ) of discrimination where you can run at 0 and hear all the tones ( this means you hear the low iron tone) or you can run it at 1 and not hear the low iron tone. As you go up the scale on the discrimination levels, ie.2,3,4, the more targets you will discriminate out ( that is, you will not HEAR the tone). One good thing about a CZ, is that you don't lose any depth with higher discrimination settings since the discrimination circuit only blanks out the sound. It also has an all metal mode.

It is a silent search detector in discrimination mode, so you don't hear a threshold. In all metal mode, there is a threshold type sound that is constant and it has VCO audio where the target sound gets louder and higher pitched the closer the coil is to the target.That mode, along with the VCO pinpointing, is good for sizing targets too. It also has 2 volume settings where from 1-5, deeper targets are not as loud as shallow targets so you can gauge depth, where as 6-10, it runs in audio boost where all targets pretty much have the same level of loudness.

The thing with CZ's is, it will false as a high tone on some deep iron and until you get the learn how the machine works and it's language, you will dig some deeper iron. You won't, or should not, dig any shallow iron to start off if you only dig the repeatable mid and high tone hits.

Not sure, since you run a Sov GT, if an Excal would be the better bet for you as a water unit since it's basically the same as the GT in terms of sounds and circuitry. Unless you want a more clear cut tone unit...then the CZ is the one. The CZ21 is a killer silver finding unit and does well on med/larger gold jewelry targets. Being locked in salt mode, it is not as sensitive to small gold, but due to it being locked in salt mode and having a manual ground balance, it runs super smooth in salt water.

 

[tvr]

therover mentions running the different discriminator settings. I either run in all metal and flip to discrimination 0 to hear the tones or just run in discrimination 0 setting so that I can hear the low tone for iron. Coil speed is important in discrimination mode on the CZ. Don't hurry too much or you loose some depth. On iron, if you get a breaking tone between low and high tone, slow the sweep down. If it then stays low tone but breaks high tone as the coil speed is increased, it's iron. Any breaking from low tone to mid tone is a must dig for me; foil trash or plated screws will do that too, but also small gold pendants. If you run higher discriminator setting, you can just not listen to iron, but any piece of iron that breaks into high tone can make you think it is a deep high tone target that is intermittent. If you listen to all the tones with discriminator setting 0, you have more information and can get more with coil speed changes.

Coil size preferences for me are the 8 inch if you go CZ-21 and 10 inch if you go Excal. Both are excellent detectors.
Cheers,
tvr

 

[Lineweed]

any reason why the 8 inch on the CZ-21 tvr? i'm under the impression its shallow than the 10", lesser coverage, and the only good thing is a better discrimination in iron-infested beaches. i'm torn over the cz-20 and sovereign GT for my iron-infested salt beaches as well.

 

[tvr]

CZ20 or CZ21 is water proof, the Sovereign isn't. Only takes one rouge wave to potentially write off the Sovereign.

My personal reasons for preferring the 8 inch on the CZ:
1) Coil drag in moving water. The 8 inch has plenty of drag and the 10.5 has even more.
2) Compromise on handling high iron sites and trashy sites with the CZ. Don't loose much depth with the 8 inch but can separate targets much better with the smaller coil.
Since it is hard wired, my personal choice is the 8 inch.

I've been tempted to try to find another Sun Ray FZ12 and put it on a CZ20 and keep a CZ20 or get a CZ21 with 8 inch as backup. The thin profile of the FZ12 cuts through the water much better than the Fisher coils, but in heavy iron or trash it is not the way to go. Last spring I hit some Atlantic City beaches near the Trump Taj Mahal with my CZ6a with the FZ12 on it and had to put the CZ6a back in the room and kick myself for not bringing the 8 inch coil. Getting multiple targets under the coil at one time is tough going with the CZ, particularly when a lot of it is iron. The Excal was OK. Several blocks south of there the FZ12 was usable. FZ12 is a coil I like a lot but they are hard to find. Those of us who have one, seldom give them up.

For the Excal, the newer thinner profile coil is OK with respect to water drag, 10 inch is not bad. The 10 inch DD separates fairly well even in iron and trash and gives better coverage. If I ran into a lot of extreme trash, I'd go with the 8 inch but the 10 inch on the Excal is my preference for where I've hunted.
Cheers,
tvr

 

[TURNMASTER]

Thanks for the info. It goes a long ways towards answering my questions also.

Jeff