Gold Gun with Gemini III Transmitter

[GOLDEN LILLY]

I agree with you Geo. Gemini III tx has very small transmission power to create secondary magnetic field to long time buried objects. So what is your suggestion? What kind of vlf transmitter and antenna do I use to penetrate deeper?

[WM6]

You should learn how antenna works first.

Gold Gun is not metal detector (which is based on near field transmission), so big TX power is here irrelevant (in most cases even destructible to our goal).

Gold Gun is based on (mostly weak) far field signal transmission and should be tuned in adequate way to work properly.

For those interested, I will be honest and post this basic infos again:

http://www.longrangelocators.com/forums/showpost.php?p=153338&postcount=14

http://www.longrangelocators.com/forums/showpost.php?p=153342&postcount=16

[GOLDEN LILLY]

Do you mean Gold Gun does not work as advertise? or it cannot work under any circumstances whatsoever except reflective method of locating objects?

Any suggestion on the kind of transmitter to be used for reflective method? Is gemini III transmitter enough?

[WM6]

Do you mean Gold Gun does not work as advertise? or it cannot work under any circumstances whatsoever except reflective method of locating objects?

Any suggestion on the kind of transmitter to be used for reflective method? Is gemini III transmitter enough?

Properly tuned and used

http://www.longrangelocators.com/forums/showpost.php?p=153334&postcount=12

Gold Gun works, but not for small things, like coins (except from vicinity in metal detector way). It works from reasonable distance (in meters) for bigger (metal or ore) deposits in soil only.

Mostly of others commercial LRL creation (in contrast to Gold Gun) doesn't work at all, or work in deceptive way only.

More TX power mean more disturbance from TX source (more parasite modulation signals, more harmonics) more EMI and more unwanted multiple cross-reflections from environment. With more power you get more signal cacophony only.

So better to stay in safe zone under 1W TX power and be more engaged with adequate positioning (regarding location and antenna polarization) of TX transmitter in regard to search micro location and proper GG search orientation. No matter which transmitter you use (as well as Gemini II) your Gold Gun should be tuned to the same frequency.

This is simple 9-12V transmitter solution (L1 is about 20 turns on 30x30cm Styrofoam body):

[GOLDEN LILLY]

Thank you for the suggestion WM6. I have questions on using a transmitter for gold gun.

First, in the schematic you gave above, how far the signal can go vertically and horizontally?
Second, what position is the transmitter with respect to the gold gun?
Third, if i tune my gold gun receiver to the frequency of the transmitter, how will i know i have detected the signal? Do i need modulation?
Fourth, what is the best antennna of the transmitter do i use, a coil or via ground rod?
Fifth, if my gold gun detected a reflection from buried object, will it display an increase or decrease (null) in my output signal?
Regards.....

[WM6]

First, in the schematic you gave above, how far the signal can go vertically and horizontally?

Using proper tuned and proper wavelength antenna (par example 1/4 lambda), with 1W your signal can travel around globe (do not use it at distances lower than 10m, even with couple of mW of TX power). So no problem with kilometer of distance.

Second, what position is the transmitter with respect to the gold gun?

At least mentioned 10m distance (better more) and as next important step you need to search for active propagation, by moving (angling and rotating) TX antenna first, along with using artificial target (par example 30cm dia metallic plate on ground).

Third, if i tune my gold gun receiver to the frequency of the transmitter, how will i know i have detected the signal? Do i need modulation?

Usually it will be enough inter-modulation with interference signals, but it is useful to use additional pointer meter or LED along with earphone.

Fourth, what is the best antenna of the transmitter do i use, a coil or via ground rod?

Coil antenna, like those with PI or BFO detectors (it should be flexible to set best propagation position). Best propagation will be easier to set with bigger TX distance from search field.

Fifth, if my gold gun detected a reflection from buried object, will it display an increase or decrease (null) in my output signal?

Both, where signals (from notable signal to null or vice versa) changes suddenly, detecting from both opposite direction, positioned GG antenna direction at 90° angle to Transmitter, there will be more chances for bigger metallic deposit under ground.
So you need to follow repetitive very rapid changes in signal. Slow changes are not indicative for our needs.

Regards.....

tx

[taxma1981]

Properly tuned and used

http://www.longrangelocators.com/forums/showpost.php?p=153334&postcount=12

Gold Gun works, but not for small things, like coins (except from vicinity in metal detector way). It works from reasonable distance (in meters) for bigger (metal or ore) deposits in soil only.

Mostly of others commercial LRL creation (in contrast to Gold Gun) doesn't work at all, or work in deceptive way only.

More TX power mean more disturbance from TX source (more parasite modulation signals, more harmonics) more EMI and more unwanted multiple cross-reflections from environment. With more power you get more signal cacophony only.

So better to stay in safe zone under 1W TX power and be more engaged with adequate positioning (regarding location and antenna polarization) of TX transmitter in regard to search micro location and proper GG search orientation. No matter which transmitter you use (as well as Gemini II) your Gold Gun should be tuned to the same frequency.

This is simple 9-12V transmitter solution (L1 is about 20 turns on 30x30cm Styrofoam body):

This circuit work from 35-50 khz
The gold gun range it is 0-30 khz

[WM6]

This circuit work from 35-50 khz
The gold gun range it is 0-30 khz

As already pointed, both devices: receiver (GG) and transmitter (above posted example) should be set at the exactly same frequency.

Using proper LC components, both devices: receiver (GG) and transmitter (above TX example), could be set (tuned) at desired frequency from say: about 20kHz to 40kHz.

Suggested working frequency here is 30kHz for both devices, but arbitrary frequency in above mentioned range could be set using proper L and C in tank circuits.

With schematic (without using crystal controlled oscillator) we can get indicative values of LC only, exact frequency should always be set by proper LC values of our actually used components.

Genuine GG AL-718 is working at fixed frequencies: 9,5kHz, 19,2kHz, and 27kHz (not 0-30kHz). GG working frequency is easily changeable by changing "USA" capacitor to other value that suit to TX (or vice versa: we can adapt TX tank circuit to suit to one of GG frequencies).

[taxma1981]

As already pointed, both devices: receiver (GG) and transmitter (above posted example) should be set at the exactly same frequency.

Using proper LC components, both devices: receiver (GG) and transmitter (above TX example), could be set (tuned) at desired frequency from say: about 20kHz to 40kHz.

Suggested working frequency here is 30kHz for both devices, but arbitrary frequency in above mentioned range could be set using proper L and C in tank circuits.

With schematic (without using crystal controlled oscillator) we can get indicative values of LC only, exact frequency should always be set by proper LC values of our actually used components.

Genuine GG AL-718 is working at fixed frequencies: 9,5kHz, 19,2kHz, and 27kHz (not 0-30kHz). GG working frequency is easily changeable by changing "USA" capacitor to other value that suit to TX (or vice versa: we can adapt TX tank circuit to suit to one of GG frequencies).

I meen the circuit from gold gun can tuned at this range 0-30 khz....


we can have better results in this transmitter?

[WM6]

I meen the circuit from gold gun can tuned at this range 0-30 khz

It can be tuned to 40kHz or even 50kHz too - no problem.

Genuine GG is set to 3 fixed frequency not for 0-30kHz as you wrote (and later "mean").

[taxma1981]

It can be tuned to 40kHz or even 50kHz too - no problem.

Genuine GG is set to 3 fixed frequency not for 0-30kHz as you wrote (and later "mean").

Οκ

[taxma1981]

Wm6

we can with a radio (AM band) and a transmitter (AM band) to detect metals and gaps?

[WM6]

Theoretically yes.
It is problem with antenna directivity. Ordinary AM radio ferrite antenna does not provide enough directivity for such purpose.
Proper tuned GG antenna can be set to high directivity. GG antenna has a much larger potential in its construction.

[taxma1981]

Thanks!!!!! The gold gun real work ,3 times i locate copper

[abdou2014]

How can I calibrate GG at 250 Khz, The highest frequency I have succeeded is 90 Khz ?