Letís talk frequencies
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  1. #1
    us
    Sep 2010
    13

    Letís talk frequencies

    Complete noob here. Iím looking to buy my first detector. Iím planning on hunting coins and jewelry and do a little gold prospecting. Iím looking for an all around machine. Iím a techno geek and usually buy the top of the line stuff. In this case however, Iím reluctant to spend $1000 - $1500 for my first detector. I want to make sure that I'm going to stay with the hobby before I spend that kind of money.

    I have been reading as much as I can, including this forum. My understanding is that higher frequencies are better for detecting gold and lower frequencies are better for detecting silver. Therefore it would seem that a detector with multiple frequencies would be better for an all around machine.

    I talked with the owner of a detector and mining supply store and he recommended the Whiteís MXT Pro. But with a frequency of 14kHz it would seem that it wouldnít do as well detecting silver.

    The Whiteís Spectra V3i would seem to be the best because it broadcasts 3 frequencies at once. The drawbacks as I see them would be the cost and the initial learning curve for a noob.

    The Minelab X-Terra 705 also has three frequencies. Itís priced right and I really like the user interface. The drawbacks seem to be Minelabís recent customer service issues and the fact that it can only broadcast one frequency at a time and you have to change coils. This would not be ideal if you were in a park and wanting to find silver coins and gold jewelry.

    Am I over thinking this?

    Any insight you all can provide will be greatly appreciated.

  2. #2
    et
    Pirate...wannabe

    Feb 2008
    Haines City, Florida (33844)
    Excall 2 w/Anderson shaft ... Minelab SE w/10*12 SEF ... GT w/180 mtr w/S1 probe
    198
    1 times

    Re: Letís talk frequencies

    look at one of the Minelab BBS (17 freqs.) or FBS machines (28 freqs.) all at once.......

    there is some claim that the Garrett Infinium LS runs 96 freqs...but i am not sure about that...

    Central Florida to east or west coast...I just enjoy going out to hunt...email and see if we will make a day of it...I can drive or gas anytime...

  3. #3
    us
    Director-Search & Recovery Team of Oakland County.

    Aug 2005
    In Michigan now.
    Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
    13,398
    3970 times
    All Types Of Treasure Hunting

    Re: Letís talk frequencies

    First, welcome to Tnet..

    You are wise to do a lot of research before buying your first detector and asking for help from us could be asking for trouble. Lee fields is right about the frequencies but that isn't the whole thing. While PI's like the Infinium LS are good for finding all metals like gold and silver they also love to find long pieces of IRON like hairpins at great depths. You do get some disc with the top of the line Pulses, but not enough in my opinion. A lot depends on where you need to use them.

    Since this will be your first detector you can go for the top of the line right away or start with a mid range and never have the features you need so you'll spend more $$$ later. Everyone wants ONE detector for all things, but that is like going golfing with one club. Tiny nuggets can be had with specialized gold detectors like the Super Lobo, Gold Bug, Stinger, GMT for example, but they would be too sensitive for normal coin hunting. Silver coins being very conductive can be had with about any detector. Toss in the fact that some of the best do not have a screen and you have some choices to make. All the top of the line detectors have a turn on and go feature with set adjustments and as you learn you can experiment with other settings. The DFX is one such that is easy to use but now days I like the very light weight of the Tejon since I never look at the screen anyway anymore, but it is there with the DFX if I want it.

    Good Luck and have fun,
    Sandman

    (C) Sandman, 2005. All Rights Reserved.
    "TIME IS THE ONLY THING YOU NEVER GET BACK, WHY WASTE IT SWINGING A DETECTOR THAT ISN'T UP TO THE TASK."

  4. #4
    us
    Dec 2006
    Combine
    Garrett AT Pro, Garrett Master Hunter CX Plus, Teknetics G2
    855
    73 times
    All Types Of Treasure Hunting

    Re: Letís talk frequencies

    Welcome to T'net and treasure hunting. You're going to get all kinds of advice here and all of it well intentioned. I am a Garrett fan and have been since I tried several other brands. They work as well as any machine you put the time in to learn and their service can't be beat. Plus the cost of a Garrett will not break the bank. The new AT Pro that is coming out next month is as close as you can get to an all around machine in my opinion. Lord knows I don't need another detector, but I am going to get one. All that being said remember that free advice is usually worth what you pay for it!
    Not all who wander are lost - Some of us are simply confused. (Apologies to J.R.R. Tolkein's memory)

    GARRETT / FISHER / TEKNETICS
    www.anthonysdetectors.com
    anthonysdetectors@live.com
    214-499-2530
    The very best in American made detection equipment!




  5. #5
    us
    Mar 2010
    Denver, Colorado
    TDI SL, Etrac, Whites XL Pro w/tone mod, Makro Racer, Whites IDX Pro w/Bills mods
    404
    39 times
    Metal Detecting

    Re: Letís talk frequencies

    Welcome to the chaos. You are doing the right thing with some research. Once you narrow down what you think is a good choice you could also consider a used unit. That way if it doesn't work for you the financial loss isn't so hard to take. Craigslist and this board with private and dealer sales are good places to check if you go that route.

  6. #6
    us
    Apr 2005
    1,053
    583 times

    Re: Letís talk frequencies

    There are many good detectors out there. Almost all top of the line detectors will find silver, and gold,coins,jewelry and even some relics. It all depends on what type of soils you are going to be hunting(beach sand,low mineral sod, western high mineral clays and sand, or water). Each presents a different problem that is handled better by some detectors than others. Without specializing, most manufacturers have opted to build a unit for varying conditions and soils. With an abundunce of coils, most can be used in varying ground conditions. While they will never compete with a specialized detector, they can be used satsfactorily in these conditions. Larger coils will get more depth,DD coils will help in hot ground,smaller coils will work best in trashy parks,ballfields,campgrounds,or around old houses.Some even have a frequency switch that can change the frequency when you encounter varying conditions, or help with specific metals.Normally, the lower the frequency, the hotter it is on silver,the higher the frquency,the hotter it is on gold.Multiple frequency detectors work well at the beach.PI works best at the beach and out west. I am not brand specific, but I do have my favorites.Good Luck. rockhound

  7. #7
    us
    Sep 2010
    13

    Re: Letís talk frequencies

    Quote Originally Posted by leefields
    look at one of the Minelab BBS (17 freqs.) or FBS machines (28 freqs.) all at once.......

    there is some claim that the Garrett Infinium LS runs 96 freqs...but i am not sure about that...

    Thanks for the reply. It's interesting that Minelab doesn't recommend any of their BBS or FBS machines for gold prospecting. In fact the only machine recommended for both coin and jewelry and gold prospecting is the X-Terra 705

  8. #8
    us
    Sep 2010
    13

    Re: Letís talk frequencies

    Quote Originally Posted by ThTx
    Welcome to T'net and treasure hunting. You're going to get all kinds of advice here and all of it well intentioned. I am a Garrett fan and have been since I tried several other brands. They work as well as any machine you put the time in to learn and their service can't be beat. Plus the cost of a Garrett will not break the bank. The new AT Pro that is coming out next month is as close as you can get to an all around machine in my opinion. Lord knows I don't need another detector, but I am going to get one. All that being said remember that free advice is usually worth what you pay for it!
    Thanks, you're right about all kinds of advice. But it's helpful to hear everyone's opinion. The AT Pro looks like a very interesting machine. However with a single frequency of 15kHz it would seem that it wouldn't be as good a detecting silver.

  9. #9
    us
    Dec 2006
    Combine
    Garrett AT Pro, Garrett Master Hunter CX Plus, Teknetics G2
    855
    73 times
    All Types Of Treasure Hunting

    Re: Letís talk frequencies

    Actually, it is supposed to be very good at it. You might want to check out a post by John-Edmonton with the five videos of an impromptu interview at Garrett about the AT Pro. Very enlightening.

    Not all who wander are lost - Some of us are simply confused. (Apologies to J.R.R. Tolkein's memory)

    GARRETT / FISHER / TEKNETICS
    www.anthonysdetectors.com
    anthonysdetectors@live.com
    214-499-2530
    The very best in American made detection equipment!




  10. #10
    us
    Dec 2006
    Combine
    Garrett AT Pro, Garrett Master Hunter CX Plus, Teknetics G2
    855
    73 times
    All Types Of Treasure Hunting

    Re: Letís talk frequencies

    Not all who wander are lost - Some of us are simply confused. (Apologies to J.R.R. Tolkein's memory)

    GARRETT / FISHER / TEKNETICS
    www.anthonysdetectors.com
    anthonysdetectors@live.com
    214-499-2530
    The very best in American made detection equipment!




  11. #11
    us
    Sep 2010
    13

    Re: Letís talk frequencies

    Quote Originally Posted by ThTx
    Thanks

  12. #12
    us
    Sep 2010
    13

    Re: Letís talk frequencies

    Quote Originally Posted by Sandman
    First, welcome to Tnet..

    You are wise to do a lot of research before buying your first detector and asking for help from us could be asking for trouble. Lee fields is right about the frequencies but that isn't the whole thing. While PI's like the Infinium LS are good for finding all metals like gold and silver they also love to find long pieces of IRON like hairpins at great depths. You do get some disc with the top of the line Pulses, but not enough in my opinion. A lot depends on where you need to use them.

    Since this will be your first detector you can go for the top of the line right away or start with a mid range and never have the features you need so you'll spend more $$$ later. Everyone wants ONE detector for all things, but that is like going golfing with one club. Tiny nuggets can be had with specialized gold detectors like the Super Lobo, Gold Bug, Stinger, GMT for example, but they would be too sensitive for normal coin hunting. Silver coins being very conductive can be had with about any detector. Toss in the fact that some of the best do not have a screen and you have some choices to make. All the top of the line detectors have a turn on and go feature with set adjustments and as you learn you can experiment with other settings. The DFX is one such that is easy to use but now days I like the very light weight of the Tejon since I never look at the screen anyway anymore, but it is there with the DFX if I want it.

    Good Luck and have fun,
    Sandman

    The DFX 300 looks like a great machine. It has 3kHz or 15kHz or you can use both simultaneously.

  13. #13
    us
    Mar 2010
    Gardners, PA
    Tejon, F-75
    72
    22 times

    Re: I am not educated on the physics of these units however......

    I once stayed in a Holliday Inn Express. Seriously though, at one time many many years ago I worked in ultrasound detection. I do recall alot of how the physics of those probes operated. The frequency was an initial consideration in detecting the flaw/crack/void. You had to size the frequency with the size of flaw. Once that was seclected, many parameters, such as dampening, beam configuration, and electrical balancing were evaluated. I have to wonder what the affect the frequency used has on the detectability of various size objects, and various conductive objects. What I am looking for is formula used to model this phenomena, not generalizations. I do believe that the lower frequency detectors miss the small objects (similar to ultrasound frequencies). In Ultrasound the lower frequencies needed larger voids, but had greater depth. The higher the frequency the smaller the void detected, but less depth. I have the physics formula packed away somewhere. Just wondered if there was any similarities or not.

  14. #14
    us
    Sep 2010
    13

    Re: Letís talk frequencies

    Well I think I've narrowed it down to the DFX300 or the X-Terra 705.

    The DFX300 is a little pricey but uses two frequencies at once.

    The X-Terra 705 is more moderately priced but you have to change search coils to change frequencies. It seems that by the time you purchased a couple of additional search coils you be getting up into the DFX300 price range.

    What do y'all think?

  15. #15
    Charter Member
    us
    Proud member of the Wolfpack!!!

    Oct 2007
    Middle Tennessee
    XP ORX XP Deus
    642
    74 times
    All Types Of Treasure Hunting

    Re: Letís talk frequencies

    Quote Originally Posted by Old and Slow
    Well I think I've narrowed it down to the DFX300 or the X-Terra 705.

    The DFX300 is a little pricey but uses two frequencies at once.

    The X-Terra 705 is more moderately priced but you have to change search coils to change frequencies. It seems that by the time you purchased a couple of additional search coils you be getting up into the DFX300 price range.

    What do y'all think?
    That xterra 70 is very fast on recovery but it will not be as good on deeper targets that the dfx would be. You said that the new AT running at a frequency of 15khz would not seem as good at hitting on silver. Well I would not be so sure about that because if you ever look at a machine that has a meter on it you will always see that silver is the highest on the scale as far as conductivity is concerned and gold will generally be somewhere in the middle or between foil and screwcaps. That being said the higher frequency machines will pick up SMALLER pieces of gold better but also smaller pieces of lead, brass, copper and foil too plus the old silver coins are going to hit hard also on 14mhz. I would consider a machine that has a good senstivity or gain setting that will allow you to crank it up in certain conditions. Also consider a machine with the ablility to manually ground balance or ground track. The lower single frequency machines are better at getting deeper targets because the signal goes into the soil better and that is why you see alot of coin machines with a frequeny of 7mhz but multiple frequency machines are better for wet salt sand. The gold hunting machines generally run on a much higher frequency and they are good at picking out very small gold nuggets or even gold flakes. If your planning on gold prospecting also then you might consider a Whites MXT but if your planning on hunting beaches in wet sand I would go with a machine that runs multiple frequencies at once and not just one that changes frequncies by switching coils. You will find if you get into it that the coil you use will almost be as important as the detector your going to use. If your going to just use the detector you get for just coinshooting in the park and looking for jewelry occasionally also then you may consider the whites M6. That new Garrett AT looks like a pretty neat machine plus it is water proof too.............In otherwords..........I love to detect a lot and when I go I do not care if it starts drizzling rain or whatever but, you have got to keep a land based machine from getting wet with either a protective cover or plastic bag or whatever. With that new Garrett AT it is already waterproof up to 10 feet and so that tells me it can get rained on with no problem either. These are just my 2 cents..............Oh yea the MXT I had that ran at 14mhz was kick a$$ on silver coins. Just my 2 cents worth, Tim

 

 
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