Jump to content

Recommended Posts

I posted this on another forum other than Detector Prospector also. I feel Detector Prospector tends to be a bit more technical oriented than the other forum so I posted it here also.

I am 100% all in on the Equinox. I like it so much I have 2 800's. My biggest gripe is how susceptible it is to EMI. Some of my best spots have EMI so bad I have to turn the Nox down to like 15 or below. I used to run a Nokta Impact in 14kHz as my main detector before I got the Nox and it had EMI issues also, but I don't remember it being quite as bad. I think the Nox is a much hotter detector than the Impact is. It's sure a lot deeper than the Impact. I don't have the problem everywhere so I know it's not a detector problem. Running a smaller coil helps some, but not a lot.

So I've had an Etrac and never once did I have any audible EMI issues. Is it Multi-IQ that is susceptible or what?

Do power companies check for EMI issues like bad connections or transformers that may be the culprit? Most of my issues have been in the older parts of towns where the power infrastructure tends to be much older.

How many other people with the Equinox notice EMI is worse on it more than other detectors they use?  

Link to post
Share on other sites

Here is your cell phone [100% fix]  and some communication's EMI fix. I slide an aluminum shield over my pod protector.  This may not work well for electrical EMI. The Equinox is the worst detector for EMI I have owned.  Dave 

 

 

DSCN4194.JPG

Link to post
Share on other sites

I don't think it's cell phone related. I think it's electrical. I guess I could try that, but like I said I think is caused by electric lines or equipment.

Link to post
Share on other sites
21 minutes ago, longbow62 said:

I don't think it's cell phone related. I think it's electrical. I guess I could try that, but like I said I think is caused by electric lines or equipment.

Well it takes about a minute to wrap a couple of sheets of foil around your detector in the EMI location.  Don't need to see the screen to know if it works, you will hear it.  BTW I use corded headphones and for this test use corded phones. 

Link to post
Share on other sites

 

On 4/14/2021 at 2:29 PM, longbow62 said:

I posted this on another forum other than Detector Prospector also. I feel Detector Prospector tends to be a bit more technical oriented than the other forum so I posted it here also.

I am 100% all in on the Equinox. I like it so much I have 2 800's. My biggest gripe is how susceptible it is to EMI. Some of my best spots have EMI so bad I have to turn the Nox down to like 15 or below. I used to run a Nokta Impact in 14kHz as my main detector before I got the Nox and it had EMI issues also, but I don't remember it being quite as bad. I think the Nox is a much hotter detector than the Impact is. It's sure a lot deeper than the Impact. I don't have the problem everywhere so I know it's not a detector problem. Running a smaller coil helps some, but not a lot.

So I've had an Etrac and never once did I have any audible EMI issues. Is it Multi-IQ that is susceptible or what?

Do power companies check for EMI issues like bad connections or transformers that may be the culprit? Most of my issues have been in the older parts of towns where the power infrastructure tends to be much older.

How many other people with the Equinox notice EMI is worse on it more than other detectors they use?  

First of all to answer one of your later questions first, utility companies do not care much about EMI unless it is signaling an imminent component failure or if one of their industrial customers complains that the EMI is causing some sort of plant operations issue.  Other than that, it is just a something detectorists have to deal with.

I think the issue with Equinox is that Multi IQ is the susceptible to EMI in general because the input signal filtering has to allow a wide frequency bandwidth of signals into the signal processing "circuitry".  To mitigate EMI the steps you should take are (some are obvious, I you probably already know this):

  1. Noise Cancel
  2. Ground Balance (technically doesn't mitigate EMI but ground noise)
  3. Lower sensitivity as necessary.  If you feel you have to lower sensitivity TOO much then:
    1. Try increasing recovery speed.
    2. Switch to another Multi IQ mode (modes which use higher weighted frequencies tend to be less susceptible to power line/transformer noise like the "2" modes and Gold modes, sometimes the Beach modes are also less susceptible even though they have lower frequency weighting - there are no absolutes so try all the modes to see how they do - remember you have to noise cancel each mode separately)
    3. Switch to single frequency (higher frequencies tend to be less susceptible to power line/transformer noise, remember to noise cancel for each frequency you try out).
    4. Notch offending TIDs (kind of a last ditch effort if you simply want to try detecting the site)
  4. Visit the sites at different times of day.  Sometimes the noise is more intense during a normal working day and sometimes weather/humidity causes more arcing an EMI.

HTH

  • Like 3
Link to post
Share on other sites

I have a 600, and the only time I ever have a problem with it is when I am near power lines both underground and elevated, massive cell phone towers, and too many cell phones active in one area on a beach. It is vulnerable as Chase mentioned.

I can also see where I might think I am susceptable to EMI, when in reality I am in a VERY trashy place.

  • Like 2
Link to post
Share on other sites

I just switch to a quiet frequency and problem solved.

  • Like 1
Link to post
Share on other sites

I’ve been hunting very high EMI areas where I live for many years (12-13 years with an Explorer SE, and just the past year with a Nox 800).  I do find myself noise cancelling a lot more with my Nox than I did with my Explorer, but I haven’t needed to lower my sensitivity very much (22-25 sens most times).  I do recall being overwhelmed by the EMI when I first started swinging the Nox for a few weeks, but after making some fine tuning adjustments with regards to lowering the volume/pitch on a range of lower target ID’s (I don’t notch out any ID’s), the EMI became more tolerable (to me).  I’m still noise cancelling quite a bit, but that’s just me always trying to squelch the noise anyway I can without sacrificing depth to search/dig those deepies!!  

  • Like 1
Link to post
Share on other sites
22 hours ago, Chase Goldman said:

I think Mul

First of all to answer one of your later questions first, utility companies do not care much about EMI unless it is signaling an imminent component failure or if one of their industrial customers complains that the EMI is causing some sort of plant operations issue.  Other than that, it is just a something detectorists have to deal with.

I think the issue with Equinox is that Multi IQ is the susceptible to EMI in general because the input signal filtering has to allow a wide frequency bandwidth of signals into the signal processing "circuitry".  To mitigate EMI the steps you should take are (some are obvious, I you probably already know this):

  1. Noise Cancel
  2. Ground Balance (technically doesn't mitigate EMI but ground noise)
  3. Lower sensitivity as necessary.  If you feel you have to lower sensitivity TOO much then:
    1. Try increasing recovery speed.
    2. Switch to another Multi IQ mode (modes which use higher weighted frequencies tend to be less susceptible to power line/transformer noise like the "2" modes and Gold modes, sometimes the Beach modes are also less susceptible even though they have lower frequency weighting - there are no absolutes so try all the modes to see how they do - remember you have to noise cancel each mode separately)
    3. Switch to single frequency (higher frequencies tend to be less susceptible to power line/transformer noise, remember to noise cancel for each frequency you try out).
    4. Notch offending TIDs (kind of a last ditch effort if you simply want to try detecting the site)
  4. Visit the sites at different times of day.  Sometimes the noise is more intense during a normal working day and sometimes weather/humidity causes more arcing an EMI.

HTH

Pretty sure Idaho Power takes EMI seriously after losing a $17.5 million lawsuit

-https://www.emfacts.com/2005/11/rf-on-powerlines-175-million-court-case/

"

TWIN FALLS — A local dairy that claimed its cows were harmed by stray electrical currents has been awarded nearly $17.5 million by a 5th District Court jury.

The lead attorney for the dairy said that, to his knowledge, the award is among the largest ever in Twin Falls County and is also a record for so-called “stray voltage” cases in the United States.

Following a 10-week trial, the 12-member jury Tuesday found that antiquated Idaho Power Co. equipment caused cows at the dairy owned by Mike and Susan Vierstra to become sick and reduced milk production over a period of several years.

"

Link to post
Share on other sites
1 hour ago, sevastras said:

Pretty sure Idaho Power takes EMI seriously after losing a $17.5 million lawsuit

-https://www.emfacts.com/2005/11/rf-on-powerlines-175-million-court-case/

"

TWIN FALLS — A local dairy that claimed its cows were harmed by stray electrical currents has been awarded nearly $17.5 million by a 5th District Court jury.

The lead attorney for the dairy said that, to his knowledge, the award is among the largest ever in Twin Falls County and is also a record for so-called “stray voltage” cases in the United States.

Following a 10-week trial, the 12-member jury Tuesday found that antiquated Idaho Power Co. equipment caused cows at the dairy owned by Mike and Susan Vierstra to become sick and reduced milk production over a period of several years.

"

 

Are stray voltage and EMI the same thing? 

 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Similar Content

    • By Erik Oostra
      Some folk believe that their prayers are rewarded, others claim that if you ask the Universe for anything it’ll respond.. But when you need a new battery for your Foxy Noxy, these methods don't work anywhere near as good as keeping an eye out on Ebay..
      Since that awful day last month when the battery on my Nox 800 stopped charging I’ve considered many options, including an external power-pack (expensive), soldering the plug-in cable to other lithium batteries (deadly), and to keep on swapping with the battery from my Nox 600 (pain in ass)..
      This afternoon I searched on Ebay and scored two new Equinox batteries for just $50 (plus $10 postage).. That’s a new battery for Foxy Noxy and a spare for the unlikely event I ever need another one! Gotta love them win/win days..
       

    • By phrunt
      I stumbled across this video of the F75 finding a silver coin deeper than the Equinox, and then he goes on to show the F75 performing better finding a coin between iron.
      What are your thoughts on this one? I never did bother buying a F75 even though a SE edition came up for sale extraordinary cheap nearby to me, my experience with my T2 had me thinking my Nox was better in almost all situations, was I wrong?    I'm a bit puzzled by this video and I guess it could be soil conditions or something but I've found my Nox far better on deep silver than my T2 and I sure have experimented a lot on untouched in ground silvers.
    • By mn90403
      I saw some waves last night and thought I'd get in a wet beach detect today before I drive to a one day desert hunt in the Southern California mountains.  I didn't know what to expect and I didn't find very much of interest but I did find this pendant.   
      Does anyone know anything about it and what the symbols and writings mean?  I'll do an image search and post what I find.
       

    • By mn90403
      Today I was walking along the wet sand just looking for any targets and not finding many.  Then I found a Jesus ring. Thank you Jesus!  I gridded the area near the ring and found an Italian chain marked CU SU so I guess that means it is only gold ionized or something like that.  It is pretty.  It was time to get off the wet sand on the mile plus walk back to the car.
      I walked around the area where I had found my Franklin 50 Cent piece and nothing new.  I went through the area nearby where I had found some recent silver and then followed my pattern back to the car.  It was a warm day and I had to keep myself slowed down at about the 3 hour mark to keep in the game.  Then I got the 35 on the Equinox and it turned out to be only my second silver 50 cent piece.  I don't think I've held one of these since I was a kid.  In the same general area was the 1944 Quarter and a couple of silver dimes.  That makes for a pretty good day.

      These are the best of the finds with two wheat pennies.

      Just after I found the ring which is unmarked I got a 5 on the 800.  When I dug it I could see the chain hanging out of the scoop.
       

      Then you feel it and know the weight is not quite right even tho the color is good.
       

      Then later I saw the markings and now it is stylish but not solid gold.  I gridded the area and kept telling myself that chains don't sound like coins.

      Then about half an hour later I did get a coin sound and what a nice coin it is.

      This has not been touched as far as cleaning.  It is one of those substantial coins that when you hold it it feels good.  So you settle down and get to work looking for more.

      It was not long after and I had the quarter and a couple of dimes and the wheats.
      This was the way it all looked when I dumped it in the containers after the hunt.

       
      The saw blade was quite odd.  I'll go back to that area one day at the beginning of my hunt rather than at the end.
      Mitchel
       
       
    • By Erik Oostra
      My Equinox 800 no longer charges, the green light flicks on and off as if its doing its job but the battery is not holding a charge.. as soon as i turn it on i get the 'battery flat' sign.. I'm one of those pedantic bastards who always runs their battery flat and then fully recharges it, for fear that otherwise it'll create a 'memory' half full.. 
      Is there anything I can do about this? or is my poor old Foxy Noxy a write off? 
      Any advice will be much appreciated.. even slaughtering a black chicken at midnight during a full moon, if it works I'll be a very happy man! 
    • By mn90403
      I have an 800 that I use at the beach.  Sometimes it drops and this causes the plastic stand to break.  I glue it but it has happened about 3 times and soon I won't be able to glue it.
      It is time to get a new cuff/stand.  I'm really not interested in new shafts but ...
      I use the 15" more than any coil if that makes a difference.
      Mitchel
×
×
  • Create New...