Vector Trek (Fitzgerald's) Frequency Sheet

[Tigera]

Hi guys,
I heard Fitzgerald's LRLs uses some kind of strange frequencies i mean the range of the freq is some kind of weird!!

Does any one any freq sheet of "Navogtaor" , "TrailBlazer" or "Mini Eliminator II" ?

Where I can find precios metal freq in range of 5Khz-50Khz??

[Qiaozhi]

Hi guys,
I heard Fitzgerald's LRLs uses some kind of strange frequencies i mean the range of the freq is some kind of weird!!

Does any one any freq sheet of "Navogtaor" , "TrailBlazer" or "Mini Eliminator II" ?

Where I can find precios metal freq in range of 5Khz-50Khz??

Read this before you spend any money -> Vector Trek Mini Eliminator II

[goldfinder]

Buy Signal Generator less that Fitgeral's Cons

Save your money
Listen all you LRL MFDs nuts. Don't waste your money on these ripoffs. You can get a really nice off-the-shelf signal generator that you can set to any frequency you like and its useful for your electronics labs too!
Goldfinder

Here in one. There are many others on eBay.

http://www.ebay.com/itm/5MHz-DDS-Function-Signal-Generator-Source-Module-Wave-/320702243129?pt=LH_DefaultDomain_0&hash=item4aab57e139

[Dell Winders]

Read this before you spend any money -> Vector Trek Mini Eliminator II

Fitzgerald's web site declares, "The locators are built by some of the best engineers in the USA and are professional grade." The design and workmanship of the Mini Eliminator II indicates that the engineers Fitzgerald relies on are incompetent.

Tigera, I don't think Qiaozhi, even considered your question, let alone provide a usable answer. As the forum's resident make believe Psychoanalyst, Dave J, might put it, read Carl's advertisement promoting his own ego. It implies that he is a more competent, and of superior intelligence than any of the many EE's, and tech's that manufacture Frequency Discrimination LRL in the world.

The question is, do the products in question actually work in the field? My answer is "Yes", to a degree,but definitely not as they are advertised with the buyers success being pretty much dependent on operator understanding of the products limitations and best survey procedures. Many LRL manufacturers & sellers won't tell you any of this in their advertising, or instructions. Operator knowledge & experience are key to success in the use of LRL's. LRL's are merely a tool and have no intelligence of their own. These products are only as good as the knowledge & experience of the person(s) using them.

I may be the only person here with the field experience qualified to answer your question? I'll try.

When I first introduced the concept of LR Frequency Discrimination to the market in 1986 the frequencies I used were calculated for me by the Professor of a small college in Florida. 5.0 Khz for Gold, and 8.7 Khz for Silver, are not the actual frequencies for Gold & Silver. They are sub harmonic frequencies. There are many sub harmonics up and down, high and low on the Frequency range that will work. It is not logical to my thinking but I learned through experience that the same frequency that broadcasts well from some Frequency Generators may not broadcast in all frequency generator circuits. Something to consider if you are having problems.

Using 5.0 Khz for Gold allows for signal drift of about 5 hz on either side in which it will still detect Gold, but not as strong the farther the frequency drifts, or moved off the primary frequency. Going too far off the primary frequency can result in detecting elements other than Gold. There are survey procedures used in the field that circumvent this , and other problems.

5.0 Khz may broadcast well with some FG circuit configurations, but may not work with other FG circuit configurations. Something to consider if you are having problems

Lower frequencies discriminate better but are more exacting having less to 0 latitude for tuning. For example, I use a micro controller programmed to a frequency of 224 hz for Gold, which works well with my circuitry. 5.0 Khz does not work.

Most of the frequencies you see posted are acquired by trial & error testing, which is fine, but what I have seen is that when a frequency works on a specific target, the testing ends without any further testing in varied locations and conditions to know if the frequency is consistent and not generating false positives. This lack of repeated field testing of LRL frequencies by manufacturers has resulted in the validity of the frequencies being reduced to mere guessing.

I hope this information is helpful. Dell

[Tigera]

Hey Guys!
"Qiaozhi" I've already read about [Vector Trek Mini Eliminator II] before and all about Fitzgerald's locators before on net.Please Read question before answer it

I'm just looking for Fitzgerald's Frequencies specially their new products.I've heard Navigator has more than 200 freq even uranium,oil,....

Thanks "Dell Winders", useful information !

I've heard Navigator High size gold freq is about 1.4 Mhz !! it should detect super tiny size but it's for HIGH size !!!

Where Can I find Different freq for gold especially the one above 5 KHZ?

[Qiaozhi]

Hey Guys!
"Qiaozhi" I've already read about [Vector Trek Mini Eliminator II] before and all about Fitzgerald's locators before on net.Please Read question before answer it

Hmmm ... so you've read the article, and all about Fitzgerald's locators. But did you comprehend what you were reading?

You can lead a horse to water, but you cannot make it drink.

Don't get led into the dark side by Dell, or you could be lost forever.

[Tigera]

Hmmm ... so you've read the article, and all about Fitzgerald's locators. But did you comprehend what you were reading?

You can lead a horse to water, but you cannot make it drink.

Don't get led into the dark side by Dell, or you could be lost forever.

Dear horse!
It seem you Can't understand what i asked!
I just asked about FREQUENCY = F.R.E.Q.U.E.N.C.Y

Does I said any thing about Purchase Fitzgerald's locators?

You Can Ride A horse but you can't ask it about freqency!

[Dell Winders]

Tigera, it's been a long time and I don't remember the Frequencies Neil Pagel used in Fitzgeralds, locators,so I am of no help.

You might wish to contact Tim Williams, at http://lrlman.com He may be able to help you. Dell

[Tigera]

Thank you very much.

[hung]

Dear horse!
It seem you Can't understand what i asked!
I just asked about FREQUENCY = F.R.E.Q.U.E.N.C.Y

Does I said any thing about Purchase Fitzgerald's locators?

You Can Ride A horse but you can't ask it about freqency!

Ouch!
Have I read right, that Ozzy was compared to a horse??

[Mike(Mont)]

I tried the 1.4MHz but it didn't work on my small target, and I don't have any gold bars handy since I lost my get-in-free pass to Fort Knox. I have used 5.007KHz at least on test targets. Other higher freq's are 9.120KHz but it's weak as far as i am concerned. Dell's 224Hz works and some of Tim's work, too. Others say anywhere from 5-5.5 KHz but hasn't worked for me.

[Qiaozhi]

It seem you Can't understand what i asked!
I just asked about FREQUENCY = F.R.E.Q.U.E.N.C.Y

Does I said any thing about Purchase Fitzgerald's locators?

Nowhere did I suggest that you were planning to buy one of Fitzgerald's useless contraptions. I only said that you should read the article before spending any money.
It is now obvious that you did not comprehend what you were reading, and for some reason are still trying to find out the frequencies used in this non-working device. Why this is, goodness knows?

As you are refusing to accept advice, then I urge you to spend as much money as possible, either purchasing one of Fitzgerald's "locators", or attempting to build a clone. The more you spend, the more education you will receive.

[Nicolas]

Hi guys,
I heard Fitzgerald's LRLs uses some kind of strange frequencies i mean the range of the freq is some kind of weird!!

Does any one any freq sheet of "Navogtaor" , "TrailBlazer" or "Mini Eliminator II" ?

Where I can find precios metal freq in range of 5Khz-50Khz??

If I good understand you

I give you shema for generator 8038 and you can chooce your frequency need

The circuit here presents an Oscillator featuring the following attributes:

• 1.1A guaranteed output current for sine and triangle waves with thermal shutdown and protection diodes
• Variable offset and gain for the sine/triangle output
• CMOS-compatible complementary square wave outputs capable of driving into 50 Ohm with rise/fall times of 30ns at 10V (new in Rev 3).
• Frequency range 0.5Hz to 300 kHz (but signal degenerates when approaching the upper frequency limit)
• Single supply operation, 5V to 15V
• About 50% duty cycle (non-precision and adjustable via a trim pot)

The ICL8038 and all parts around on the lower half of the sheet make up the actual oscillator which is a modified design based on one of the application examples in Intersil's data sheet. There is a large 6-stage switch (S1) to select the major frequency and a logarithmic potentiometer (R2) for minor frequency selection.
I discourage implementing the oscillator as shown in the above sheet because most of the other potentiometers turned out to be without significant enough effect on the output wave form to jusify their application. Furthermore, duty cycle adjustment will not keep a 50% ratio over all frequencies.
The switch S2 is used to choose between sine and triangle wave for the high-current amplifier.
The CD4030 on the left top is used as CMOS-logic signal preconditioning feeding the MOSFET driver IC ICL7667 as output stage for the complementary square wave output. The application of the two XOR gates has the advantage that it can supply a sqare wave and its complement without time offset between them (because CMOS has balanced raise and fall times). Use a bypass capacitor near the ICL7667 device as it can draw quite strong currents and is capable of driving into 50 Ohm up to at least 10V resulting in rise/fall times of 30ns. So, I'm now entirely satisfied with the digital output.
The industry-standard LM741 in combination with R11 is used to adjust the sine/triangle offset level. (Hint: You should probably use something better here - especially more output current cannot hurt.) Since this oscillator is single-supply, it comes handy that you can change the "zero level" of the wave output; you will normally adjust that to half of the supply voltage. R11 is meant to be available to the user.
The actual sine/triangle output amplifier was a bit hard to find because it should be able to drive 1A while still not degenerating signal wave form at some hundred kHz. After some searching, I found the ADSL line driver LT1210 from Linear Technology. Being an ADSL line driver, it has a high GBP and high slew rate while providing the required output current (1.1A guaranteed) at all frequencies in question. The part can be obtained e.g. from Bürklin.
It turned out that this quick current feedback amplifier required very good DC decoupling/bypassing capacitors in order not to start oscillating of its own (at frequencies up to 40MHz). It took me a lot of time to get it work properly; but once that is achieved, the amplifier shows very good performance. (Note: The current implementation is not yet perfect as I noted some months later: It may still start oscillating for parts of the period when driving some special loads.)
R18 is used to trim the VCO output offset from the ICL8038 (about half supply voltage). R12 is meant for the user as gain adjustment to tune the sine/triangle amplitude from zero to more than supply voltage (resulting in wave tips being cut off). The maximum gain is trimmed by R13/R14 and care sould be taken to use proper values (consult LT1210's data sheet for details).

[Dell Winders]

Nowhere did I suggest that you were planning to buy one of Fitzgerald's useless contraptions. I only said that you should read the article before spending any money.
It is now obvious that you did not comprehend what you were reading, and for some reason are still trying to find out the frequencies used in this non-working device. Why this is, goodness knows?

As you are refusing to accept advice, then I urge you to spend as much money as possible, either purchasing one of Fitzgerald's "locators", or attempting to build a clone. The more you spend, the more education you will receive.

Take your meds Qiaozhi, and quit butting in. Who cares about your rants? Your prejudice is showing. Dell

[Qiaozhi]

Take your meds Qiaozhi, and quit butting in. Who cares about your rants? Your prejudice is showing. Dell

Do you have a list of standard sentences that you select at random and insert into your posts?

If not, then I suggest you create such a list; as it would save you a lot of time repeatedly typing the same thing.