Confnused? Can you help?

[larryk56]

Hello!

I went out detecting with my V3 today.
I took off the D2 coil and decided to try the Elicpse 5.3
that Whites send me for the V3.

I searched in the Coin Mode for awhile today.

I thought the Coin mode eliminated Pull tabs. I keep seeing
the pull tabs icon show up on the screen. Yes, I know those
pull tabs still may be there but ....I thought it would not show up
on the screen as well.

Any thoughts?

Another time in the Coin and Jewerly mode it showed 50 cents.
I landed up digging a long piece of iron.??

 

[Rob (IL)]

You didn't say what tabs still showed. To begin, coin doesn't disc out all the tabs, it only eliminates tabs 26 to 50 that leaves all the tabs between 21 to 26 and all the pieces of tabs below these numbers. The big iron is no surprise. If you had lifted your coil use would have still gotten a good signal telling you it was not a coin. Rob

 

[ak_1234]

The coin mode only blocks out the VDIs that are notoriously pull tabs. There are other VDI's that can be just as likely a nickel as a pulltab - they are still there. So, you still may get some pulltab icons showing.

Iron has a tendency to change phase as your coil sweeps over it. What did the spectragraph look like? If your predominant bar was in the rejected area, you probably have iron. And sometimes targets can just fool a detector. Try sweeping over it one direction and then turn 90 degrees and read it again. If it doesn't read the same you most likely have iron.

 

[The Beep Goes On]

I believe the coin mode accepts +15 to +25 and +51 to +94. The lower range is for nickels, which is also where a lot of pulltabs are too. The upper range would accept a half dollar but, in your case, it was just a tricky piece of iron. So, nothin' wrong...you can modify your discrimination settings to get rid of the pulltabs and nickels, or maybe tighten it up a little.

 

[larryk56]

I'm trying to figure out the Spectagraph.

From what I read ....good signals should look like a camel hump.
That's all I know so far.

What is the rejected area.

Sometimes I see the camel hump upside down.

I appreciate your helping out!

 

[thebeatmachine]

They look like a tab on a coke can but bigger. They're from the 60's ,I think they're alloy can ring off as a Zinc penny. Gold rings can zap there too.

 

[Larry (IL)]

The spectagraph is the vertical bars on the live screen. I think you might be talking about the Analyze screen, (trigger forward). It is possible for inverted "camel humps" to be a coin that is on edge. As always...........when in doubt.....DIG. I encourage all newbies to dig everything at first and make mental notes to link what the dug target is and what information the V3 was giving you. You will learn a lot quicker what a good target/bad target looks and sounds like. As you gain more experience metal detecting, you will quickly develop a real good sense at what is in the ground. Keep in mind ANY metal detector is just a machine and it is just taking it's best programed guess at what it has detected.

 

[larryk56]

From the best of my memory....
as I was swinging the coil today I was getting the
pulltab photo icon along with another icon at the same time.
(In coin mode)

I can't remember the VDI that was showing but I will make
better notes from it all.

I was out quit awhile today and dug and dug and dug
in the C&J mode.

After being tired ....I was thinking that I could cut back on
the digging and go for coins only.

Slowing but surely ...... I am learning more every day.

 

[ak_1234]

Yes, as Larry said, I was talking about the search screen graph, not the analysis graph (or otherwise known as the sizing graph). The spectragraph defaults to having regions that indicate accepted and rejected regions. Accepted regions show the bars in green, rejected regions show the bars in red. The stronger signals will have the bars showing taller. It is possible for a large chunk of iron to still have a signal after the recovery delay has expired (I don't know what setting you have for your recovery delay). If the VDI for this remaining signal is in the accepted region you will see the VDI. However, if the original iron signal was in the rejected region, you will see the red bar and not the small green bar because the red bar is so much bigger. If the bar is green, then the detector got fooled, plain and simple.

 

[Silverblooded]

larryk56, I have also seen the upside down humps on mine also. I think I remember where I saw them in my yard. I will try to find them again and post what I find.

Take a coin and do a air test and run the coin forward and back-not side to side-on it's edge and look at the hump. Look familiar? Not an upside down hump, but almost a pull tab graph.

HH.
Silver

 

[Neil in West Jersey]

I have noticed that the deep iron tends to jump up into the coin range, more so than on the DFX. One possible solution would be to use 2.5 Khz and turn off normalization. Then you can eliminate +93 and +94 without risking losing large silver, which will come in with lower VDI numbers. You will get less of the "wraparound" effect of iron.