Hey Bryce.....................

[Eddie in Poulsbo]

Could you go into more detail about nulling, what causes your machine to null and how you pick out silver coins when your machine nulls. May seem like a dumb question, but I'm sure others on the forum might want it explained a little more as well. Thanks.

Eddie

 

[Hotcz70]

Hi Eddie.

No question is a dumb one.

To be honest I've tried explaining it many many times and posted about it those same many times...so I'd rather not do it all over again.

There are a lot af varying opinions from many hunters and many feel it is not good for the machine to be nulling.

All I'm gonna; say is that I agree...you DON'T want it nulling too much.

On the other hand though...if you're going slow enough...the Explorers are capable of getting deep coin signals through the iron nulls for me... IF I'm creeping along slow enough.

There are a couple of paragraphs on nulling ("blanking") which explains it on page 21 of the explorer SE manual which can be downloaded.

I have noticed quite a few guys on the E-Trac forum are noticing the same thing on the E-Trac...and have posted on finding coins while the machine is nulling.

You might want to post this over there too.

 

[gibsondan]

Hope this is of some help. Here's a video of a hunt I did on January 23rd. I found two Mercury dimes with my new 8x6 SEF Butterfly coil on my E-trac. Check out the signal on the 2nd dime. When you first hear it, the detector is in the quickmask mode (all metal open screen) and the numbers are all over the place. Then I switched it back to the discrimination mode and swung the coil many times from two directions over the target. It nulled just about every time but every so often you will hear a high toned peep or partial peep in the video. It didn't sound like a good target. I actually walked away from it and then came back and dug it. I was curious about those high toned peeps breaking through the nulls. After I cut the plug, flipped it back and checked it with my probe, it sound very good. I now think there was an iron object in the plug above the coin, which turned out to be a 1926 Merc. That piece of iron was masking the dime.

Remember, it's the 2nd Merc in the video (at the 3:40 mark):

[video]http://www.youtube.com/watch?v=TsuQcfTf6Og[/video]

Happy Hunting!
Dan

 

[dewcon4414]

Simple answer to what causes it... anything you have discriminated out. Which for most of us includes 90 percent iron and EMI. Anytime you pass over a disc out target your coil will detune and go null or blank to the threshold sound. Thats why most of us run a very low threshold. This allows the weak deep targets to break the threshold. It also allows us to recheck those targets for good targets close to the one disc. To help in this we may need to reduce our sensitivity so we dont pick up deep iron, reduce our gain, open our disc up, or even run in FAST recovery. When you go over a disc target its like squeezing a sponge, you coil halo swinks... then recovery must happen. When that does, and its not as slow as most believe between targets, it will recognize the next target. So ya you are in null... but you are also in recovery. Yes i get some great targets during null or detuneing. Thats my 2 cents on it.

Dew

 

[gibsondan]

Here is another video on the subject of getting silver through nulls:

TheWalker1847 uses an Explorer II and an E-trac in this great demonstration
[video]http://www.youtube.com/watch?v=5oT4yHL3irA[/video]

 

[Eddie in Poulsbo]

n/t

 

[Eddie in Poulsbo]

n/t

 

[Eddie in Poulsbo]

n/t