Falsing issue

[Jim D]

I was hunting yesterday with my V3i going over the same yard that I found a deep indianhead(10") also 6"V nick about 4 days ago,As I mentioned in a post
there wasnt much minerlization or EMI and I cound run the sens high. Well like Magic,s post in Sept My V3i start falsing very badly,In the air and
on the ground.I started turning all the sensitivities way down to try to get it under controll,It helped some but didnt stop falsy completely.I turned
the V3i off and back again,didnt help.The freq offset wasnt on like Magic found his to be that caused his falsing problem.
I kept hunting with some falsing with sens still low.
for about a 1/2 hour trying to figure it out. It seemed then like the falsing started to clear up and about time for me to leave it was ok and I turned my sens
back up and it was ok.
I went back there today and there was hardly no falsing issues.
Could there have been some type of electrical interference (cell phones or CB,s or any kind of electrical equiptment) that might have caused a
problem like this?
Regards; Jim

 

[cvs]

Did you hold the coil in the air, about waist high and pull the trigger (pinpointing) to see if you were getting any motor boating or was it nice and sold and steady. ( EMI test )

 

[nw1886]

I had that happen with my V3 (1.3) a couple times and when I'd go back...normal? Nothing so far with the i. It's gotta be something like you suspect. Did you try a single frequency to see if you might be able to side step some of that?

 

[Larry (IL)]

I think it is UFO's in stealth mode.... or big brother watching us....

It has happened to most of us at one time or another no matter the detector. Most of the time Nancy and I just look at each other and start looking around for transformers, evidence of underground wiring, transmission towers or whatever might be the cause. Like you said Jim, sometimes it goes away, sometimes not.

 

[jbow]

Could be some amateur radio in the area, or some other equipment that operates irregularly. We have some areas around here where the power is really dirty. Two places in particular where I cannot listen to AM radio when driving there. I think the power is coming from a local dam in those instances, at least one is. Actually the power that comes into my home, underground, is terribly dirty. For any audio applications like computer based recording I have to plug in through some power conditioner.

Did you try the first suggestion of pinpointing with the coil waist high, maybe turn a 360 or walk out 50' and then walk in a circle around where you were to see if it is hotter in any direction. Did you run through the Freq offsets while in PP to see if you could quiet it? Lower the RX?

I have not had this happen thank goodness. I have been places where I could not hunt with the F75 LTD and the V3 was usable, though I had to use the 4x6 and turn the RX and disc sens lower... but I made finds. There were HT powerlines about 75 yds away at that park.

You might try lowering the GB offset too... I don't know but it might help.

Try switching to a low power program like the original Coins program, it is still there in the library or switching to Common and if it quiet raise the disc sens until you get noise, same with RX...

You didn't have a cellphone in your pocket did you? They usually wont do that unless you are in an area with poor or no service, then they will.

Was it uniform across the whole site or just part of it? I am curious because I still have not upgraded my V3 and don't want to take any chance of having some problem that I don't have now... but i do want the upgrade... so I guess i'll take my chances but I don't like problems that are shrugged off as if saying "oh well, that just happens sometime". It shouldn't. If you can will you carry another detector with you and try it the next time this happens so you can see if it is the detector or the environment?

Is there any chance that you had your pinpointer switched on without realizing it? What sort of probe (pinpointer) do you use?

Let us know if you figure it out... and if it happens anywhere else or just at that site.

Julien

 

[burlbark]

It has happened to me also. I figure it is just a burst transmitter sending off all my conversations.....

 

[Jim D]

I didnt have a cell on me, and I did walk all over the yard maybe 100 ' trying to run away from the problem. I also noticed some times I would lay the Detector down to ck a signal and it would start getting alot more falsing.
Next time I,m going to try single freq to see if that changes anything.
Like Larry said sometimes it happens and sometimes it dont.

thanks guys; Jim

 

[yazoo]

Just a check ,Do you use a coil cover? H.H. Yazoo

 

[Jim D]

Yes I use a coil cover,I did lower the Rx,AM,Disc from 12 - 74 - 84 to 6 - 70 - 75 helped some but was still a problem,
and yes it was all over the site. I went thru and used the best freq offset. The battery power was good.
When you start backing the sens off alot you loose alot of depth.The same yard a couple days earlier was producing older
deeper coins because I was able to run the sens hotter.
I want to say Im not knocking the V3i, its a great mach,Im just trying to figure out why this falsing started all at once and then
a little later started clearing up again.
I use a Garrett pin pointer like you see alot of detectorist using in the u-tube video,s.
I have a DFX too and I havent used it all summer because I know the Vectra V3 or V3i will get the deeper targets.

Jim

 

[jalon]

If you have another search coil with you, give it a try. Different coil types will handle external noise better in some cases. If you are running a 2 D, try a concentric, or a different size DD. Another possibility is that your coil connector may need to be tightened. Even slightly loose connections can cause noisy operation.
Keep us posted.
John London

 

[yazoo]

The reason I ask about the coil cover was to make sure you clean it out if you use it. You really don't need 1 unless you are working very rough terrain. This can cause the same problem you described unless you used it somewhere else afterwards and it was fine. Yazoo