Accurate Locators Metal Detectors

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VLF Information Page

New Breakthrough In Technology AGR & BGR Receivers Are New Scientific Instruments.
NOT A Dowsing Rod!
VLF AGR & BGR How It Works!

*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals.

*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals. - See more at:
*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals. - See more at:
*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals. - See more at:
*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals. - See more at:
*Not for direct receiving of AM transmissions, for a tuned resonant. .(secondary) frequency signals. - See more at:

These instruments work by local A.M. Radio Stations transmitting or sending signals both in the air and under the ground surface, which energizes under ground targets as seen by the treasure chest.  Once elements are energized, the VLF receivers detect the electromagnetic field that resonates at a frequency specific to the metal or material being located.

The VLF receiver dial is tuned to a specific number that is relational to the mathematical calculation based on A.M. Station transmission frequency (in Kilohertz), multiplied by the resonant frequency given for the particular underground target to be located.

The Accurate Locators AGR & BGR series locators are a Very Low Frequency, tuned direction finding receiver, used for locating the exact resonant frequency of underground noble metals.

The Accurate Locators VLF Receiver consists of a sensitive directional electromagnetic field (EMF) detector, coupled to a high gain electronic amplifier.  The output of this device is connected to RMS digital display voltmeter to give readings of the field measurement, or to an audio amplifier which allows the user to “hear” differences in the electromagnetic field detected.

Location of targets to 100 Ft. distance, and 100 Ft. Depth (depending on target size, purity of element, and available radio transmission sources).

ADVANCED GEOPHYSICAL RECEIVER: Currently locates Noble Metals.  Current research in progress to locate more elements by interchanging receiver antenna barrels.  Available soon.  The AGR is the advanced electronic circuitry that receives larger signal changes from background of target area and when target is located. 

Detailed description of AGR:
The AGR is a double conversion, super hetero-dyne receiver with directional signal reception capabilities and locates large bodies of Noble Metals. Instrument comes with 2 plug in Antennas.

Now Available At This Special Introductory Price At $9745. 3 Year Warranty!

BASIC GEOPHYSICAL RECEIVER  Also locates Noble Metal targets.

Get It Now At This Special Introductory Price At $4985. 3 Year Warranty!

AGR - Advanced Geophysical Receiver

Scientific Evidence Of Operation

Possible Explanation for the Observed Electromagnetic Radiation of Earth Elements

Mr. Decesari, P.E. Engineer

Proprietary Information

For approximately 20 years, Accurate Locators Inc., has been utilizing very low frequency radio waves for the detection of elements in the ground quite successfully. Basically, very sensitive VLF receivers, manufactured by my company, we have been used to detect and isolate low frequency emissions undoubtedly coming from elements in the ground. However, the exact mechanism of this phenomenon has never been fully understood by myself or Accurate Locators! Accurate Locators had determined that specific low frequency radio signals seem to emanate in certain mineral rich areas of the Pacific Northwest that were irradiated by strong higher frequency signals and radio stations. In response, they contacted us to design, develop, and ultimately manufacture for sale receiving hardware that might be used for the detection of these elements in the ground. As time progressed, this hardware developed into somewhat sophisticated hand-held receivers that are presently being offered for sale to the general public. This write-up is an attempt to more accurately explain the phenomenon that is being observed with this equipment and capitalized upon.

Electromagnetic detection of elements in the ground appears to be based on the principle of excitation of free electrons of the element by some applied external radio frequency energy. This excitation energy produces “electron spin resonance” of the free electrons at a frequency that is unique to that element, and related to both the natural resonance frequency, as specified in the periodic tables, and the excitation frequency. The electron spin phenomenon produces a secondary electromagnetic radiation, which is what the Accurate Locators detectors that we produce are actually detecting. The exact power level of this secondary radiation is not known, but is probably directly proportional to the power level of the excitation frequency. Never-the-less, it is in the micro-watt range at the very best, and most likely, the nano-watt range (or less) is the norm. Also keep in mind that both the secondary radiation frequency and the excitation frequency must be in the low frequency end of the EM spectrum range in order to travel through the earth’s surface. Therefore, it is not likely that any excitation energy above about 2 MHz is doing any good, and most likely that radio signals of about 1 MHz and lower into the frequency spectrum are doing the most excitation of the element in the ground. Conveniently, all of the AM broadcast stations in the United States are located between 540 KHz and 1700 KHz (.540 and 1.7 MHz) with transmitter power levels to their antennas normally between 2 KW and 10 KW. Some stations also have gain-type antennas, thus effectively increasing the radiated power levels in specific directions by as much as 3 to 5 dB or so. Also, virtually all AM broadcast stations utilize vertical antennas that are worked against ground and have elaborate ground counter-poise arrays. That is, the earth’s ground is an important part of the antenna system and RF currents are flowing in the ground as well as the air, to summarize the antenna excitation process. It is this RF energy that I believe is exciting the elements in the ground, causing the secondary very low frequency emissions that our equipment is detecting.

Initially, I was thinking that there was a unique excitation frequency for every element. This apparently is incorrect. Any, and all, radio frequency energy that can penetrate the earth to the element’s ground depth, will excite the free electrons, thus producing a secondary EM signal due to the spin resonance, that is related to the excitation frequency. As stated, the element’s resonance frequency is given in the periodic tables and referenced to the Hydrogen atom at 100 MHz. (I am unclear how this resonance number is determined. I am beginning to think it is a reradiated signal when that periodic table element is excited by a 100 MHz source.) Never-the-less, this number (usually specified in MHz) is referenced to the Hydrogen atom at 100 MHz. Hence, the specified resonance frequency of the element may be normalized to 1 MHz, or divided by 100 Mhz. The resulting “dimensionless” fraction is used to multiply the applied excitation frequency (in Hz, KHz, or MHz - best to use Hz and convert to KHz or MHz after the calculation) to give the secondary radiation frequency that our detectors are tuned to.

For example, going to the periodic table, we see the resonance frequency of Gold Isotope 197 (reference the 100 MHz Hydrogen atom) is 1.729 MHz. This number divided by 100 MHz gives us .01729. Now, assuming we have a strong radio station at 1.7 MHz (1,700,000 Hz), we multiply this frequency by .01729 and we have the secondary emission frequency of 29,393 Hz or 29.393 KHz. This is where we tune the detection receiver. Similarly, if we had a strong 600 KHz radio station (which would penetrate the ground considerably further than the 1.7 MHz station, we would multiply 600 KHz by .01729 and get 10.374 KHz, where we would tune the detecting receiver, and expect to receive a secondary emission from the element.

This analysis is tending to indicate that for any given excitation frequency, there is a single unique secondary emission, or in radio terms, a carrier wave. Dr. Charlie Slemmens thinks that this is indeed the case. However, consider the following: the element in the ground is actually being excited by every radio station in the vicinity under 1.7 MHz that can penetrate the earth to the element’s depth. So, in effect, it is contributing to the noise floor observed in that region. In reality, there may indeed be a stronger, unique signal here and there in the low frequency spectrum due to very strong excitation radio stations in the broadcast band, but there may also be a general increase in the noise floor because of the cumulative energy that the element is absorbing and reradiating at the lower frequencies. Unfortunately, we have never taken the time, or invested money for a field test, outside of detecting numerous known gold mines to ascertain if it is a unique signal that is being received in the field or just receiving and increase in the noise floor energy. I tend to think it is primarily the noise floor with perhaps occasionally a unique carrier as well. Keep in mind that our EM sensor is very directional. So our detecting receivers can determine from what direction this increased noise floor (or carrier wave) is radiating from, and hence the general direction, or location, of the element vein. Also, the detectors are relatively broad–band sensors, with typical front-end band passes of 10 KHz or so. Our bandwidth is primarily a function of the Q of the materials used in the EM sensor at a specific frequency. Thus, a unique carrier signal could easily be buried in the noise and not noticed, other than seeing a general increase in the noise floor power level.

To date, my explanation of this phenomenon is probably the “best thing going!” My only questions are related to the 100 MHz Hydrogen reference and the “normalization” process described above, and the exact power levels of the signals we are dealing with. One would think that we should be able to duplicate this phenomenon in the lab. I have been giving this some serious thought, and as time permits, may undertake some basic testing in this area, with the equipment available.

Reference: Numare Spectralab, Periodic Tables, specific elemental properties for Gold, isotope 197,