hi dear wm6
please guide me abuot built coil 56nh in dr.best in 2 anenna ???
i want dr.best 2 antenna.please guide me.
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dr. Best Ultimate Single Chip Two Antennas LRL
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In inner pocket of jeans by advanced digital cycle version. Here we presented Ultimate analog version of LRL.Originally posted by Fred View PostWhere do you glue the calculator ?
If someone interested, here approximate wideband spiral coil data: outer diameter 222mm, inner diameter 22mm, wire diameter 2,2mm, inductance 222uH, number of turns 50, lenght of used wire 19m/coil. One can experiment with very different diameters, wires or tubes, nr. of turns, shieldings etc.
Some samples:
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Hi Geo, if you work under power line you need 50/60Hz filter for sure. The same near railway. About 500 m away from such disturbances you do not need filter anymore. But if you wish you can put VLF compensative capacitor 22nF in parallel to R1. In this case you can not count on VLF signal detection. Dr. Best rejects the use of filters. In case of strong outer disturbances spiral antenas can bi installed in plastic tube (as for sewer use) shielded by householding alu foil connected to ground point.Originally posted by Geo View PostHi. We need filters at least for 50/60 Hz. Also we have strong signal at gold even if near it there is rust.
Regards
In case of gold signal is strong and sharp. In case of rusty ferro signal is still strong but towed and not sharp. In case of gold and rusty ferro combination signal is strong and towed with sharp dips. One need reasonable practice to achieve good distinguish between signals.
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Originally posted by WM6 View PostAs you stated, placement of antennas can be important question. Related to soil antennas have to be stacked. So below antenna load more capacitance from soil in comparisons to upper antenna so signal by right antennas position cannot be the same. Additional this help to establish right direction to gold cause dip can be strongest in position in which no one of antennas cover apart other antenna reflected VHF signal from buried gold. A strong and sharp signal is obtained only from the precious metal with a smooth surface with no rust, therefore, filters are not necessary.
But for more advanced and experienced LRL user dr. Best suggest to build spiral wide-band antenna which represent big improvement in comparisons to telescope antennas. Spiral antennas are connected by center of windings to pin2 and pin3 of INA121, by other end of coil over 22pf C to ground point and spaced between each other for 1/2 of diameter of antenna (you can figure it by attached picture).
Even better than spiral antenna can be Pyramidal logarithmic quadro spiral antenna as currently used in their LRL devices dr. Best, but it is hard to build in the home workshop.

Hi. We need filters at least for 50/60 Hz. Also we have strong signal at gold even if near it there is rust.
Regards
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In the final version of the Ultimate LRL rev. 3.2, dr. Best use only Pyramidal logarithmic quadro spiral antenna. Probably antenas structure not to be publish until anything gold is find in the ground.Originally posted by J_Player View PostYes, We can see the construction of the spiral antenna for big improvements over the telescopic antennas. But what about the Pyramidal logarithmic quadro spiral antenna? Is this antenna only used in the Dr. Best secret LRLs?
Best wishes,
J_P
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Yes, We can see the construction of the spiral antenna for big improvements over the telescopic antennas. But what about the Pyramidal logarithmic quadro spiral antenna? Is this antenna only used in the Dr. Best secret LRLs?Originally posted by WM6...But for more advanced and experienced LRL user dr. Best suggest to build spiral wide-band antenna which represent big improvement in comparisons to telescope antennas. Spiral antennas are connected by center of windings to pin2 and pin3 of INA121, by other end of coil over 22pf C to ground point and spaced between each other for 1/2 of diameter of antenna (you can figure it by attached picture).
Even better than spiral antenna can be Pyramidal logarithmic quadro spiral antenna as currently used in their LRL devices dr. Best, but it is hard to build in the home workshop.

Best wishes,
J_P
Leave a comment:
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As you stated, placement of antennas can be important question. Related to soil antennas have to be stacked. So below antenna load more capacitance from soil in comparisons to upper antenna so signal by right antennas position cannot be the same. Additional this help to establish right direction to gold cause dip can be strongest in position in which no one of antennas cover apart other antenna reflected VHF signal from buried gold. A strong and sharp signal is obtained only from the precious metal with a smooth surface with no rust, therefore, filters are not necessary.Originally posted by J_Player View PostYes, good question.
If both antennas are close together, then maybe maybe they both will see the same gold signal. Maybe it is important to make the antenna spacing some distance from each other in order to detect the presence of gold signals shooting in the direction of the antennas.
Best wishes,
J_P
But for more advanced and experienced LRL user dr. Best suggest to build spiral wide-band antenna which represent big improvement in comparisons to telescope antennas. Spiral antennas are connected by center of windings to pin2 and pin3 of INA121, by other end of coil over 22pf C to ground point and spaced between each other for 1/2 of diameter of antenna (you can figure it by attached picture).
Even better than spiral antenna can be Pyramidal logarithmic quadro spiral antenna as currently used in their LRL devices dr. Best, but it is hard to build in the home workshop.
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Yes, good question.Originally posted by GeoHi Esteban. INA121 is a low noise amplifier with max gain 10.000. So at low frequency it can detect (maybe) a signal smaller than 1uV. But it need some filters.....
One answer: does it see any different between the 2 antennas???
Regards
If both antennas are close together, then maybe maybe they both will see the same gold signal. Maybe it is important to make the antenna spacing some distance from each other in order to detect the presence of gold signals shooting in the direction of the antennas.
Best wishes,
J_P
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Originally posted by Esteban View PostGeo
This doesn't work, and not in this very poor implementation. Is a simple joke.
Regards
Hi Esteban. INA121 is a low noise amplifier with max gain 10.000. So at low frequency it can detect (maybe) a signal smaller than 1uV. But it need some filters.....
One answer: does it see any different between the 2 antennas???
Regards
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You never judge other products according to your own products.Originally posted by Esteban View PostGeo
This doesn't work, and not in this very poor implementation. Is a simple joke.
Regards
Device is working, and working even far better than all Mineoros. Which are just extremly expensive joke.
And Esteban, take notice that the dr. Best plans may not be used commercially.
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In fact, L1 and L2, are not critical Geo.Originally posted by Geo View PostHi WM6.
Any details for L1, L2???
Is there any kind of sample ?????
Regards
You can compensate deviations by telescope antenas.
You can put on your finger 3 to 5 windings (dependent on which finger you use) of 2 mm dia Cul wire by same spacing between windings and you came out by 56nH.
I am sorry, but dr. Best are not alowed to publish photo of his more sophisticated final LRL device. He give us only simplified schematic and PCB of pure joy due personal bankruptcy his former wife.
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