Gold Gun with Gemini III Transmitter

[GOLDEN LILLY]

Hi to everybody, specially to those who are knowledgeable to vlf theories and its application. I have build the gold gun and i have heard that the vlf transmitter where it is tuned to is no longer transmitting vlf signal. So, i used my Gemini III (transmitter) as local transmitter. It transmit 81.92 khz according to the manual. I tuned my gold gun to the same frequency. I am not sure if its transmitter can be used in conjunction with the gold gun. So I ask somebody in this forum to help me the correct procedure in doing the search.
The Gemini has a ground assembly an option in locating a buried pipe with known point. So i use this option via a stainless rod inserting into the ground to transmit the signal. I do not know if i am right on this set-up. So, here are my questions:
1. What is the best way of transmitting a signal into the ground? Is it via a rod or the loop antenna?
2. Is the loop antenna vertical or horizontal? (lying flat in the ground)
3. If I use the loop coil and not the rod, what is the correct procedure for the search?
4. What is meant by "searching" at the edge of the area to be surveyed?
5. What is the estimated distance between the gold gun and the transmitter?
6. At what depth that the transmitter can go underground?

Any help is highly appreciated...Thank you

[FrancoItaly]

I am interested in this topic and when I have more time I will concentrate on this. Check out this link that I found very interesting:

https://borderlandsciences.org/journal/vol/53/n01/Vassilatos_on_Ground_Radio.html

[WM6]

aulook, you can get answer at most your questions, if your test your Gold Gun with about 2m long buried metallic pipe. You cannot test it on single coins or something small like this , cause GG is not able to sense small item on depth. It can sense only bigger deposit/targets at reasonable distance.

What orientation of TR coil/antenna is best in your case, depend on TR/antenna construction and its distance from buried testing target (suggested: pipe). It is about sub-terrestrial wave prospecting and signal polarization. Of course depend on antenna construction and polarization, but most TR tuned antennas can be adapted to real search environment conditions. It is hard to say what distance will be best in your case - you need to check this on selected terrain with testing target buried at reasonable depth (for test between 0.5 and 1m.

Do not use to much TR power, since you get signal-reflective cacophony only!

So, for test: small TX signal, big prolonged buried target, then a lot of antenna distance and orientation checking - this can lead to success.

[GOLDEN LILLY]

Thank you for your good suggestion WM6. I know that you are very knowledgeable in vlf topic. Actually i am looking for Big and not small objects like coins or gold nuggets. I have Gemini III so it came to my mind to try to use its transmitter as local oscillator. I did pick up the signal from my built gold gun but only 3 meters and when i inject the signal into the ground via a ground rod connected to the ground assembly, the gold gun will not sense the signal. So please give me idea what is the correct method of searching using gemini transmitter and gold gun as receiver. Will the gold gun null if it detects a reflected signal from buried object or will its output increase if it also detects a buried object? Sorry for many questions that i asked, i am still studying on this type of method. Thank you..

Regards...

[WM6]

Testing target (suggested 2m metallic pipe) should be buried horizontal not vertical.

More latter I am weekend-moving to another town now.

[Geo]

No reason to use an external transmitter for the GG. If you make a fine tuning to it you can tune it to a strong transmitter (there are so many). If the meter readings more than 120...150 mv then all are ok. But I don't know if you will find something with it.
Also don't tune it at frequencies more than 30 KHz because LM324 can't give the gain of 30.. or more at high frequencies.

[GOLDEN LILLY]

Thank you for the suggestions Geo. I used the Gemini transmitter as local oscillator because i'm not sure what vlf frequency that can be heard in my country. So i downloaded software defined radio the SAQ free software to hear distant vlf transmissions although limited only up to 22 khz. Now i know what frequency to tune to because i hear a steady 5.0 khz 18.3 khz and 20.8 khz. I tuned my gold gun on these frequencies.
I use a dc millivoltmeter with low voltage drop diodes (bridge configuration) since i have no rms ac millivoltmeter. The result is that it is not accurate. I also notice a sudden increase in voltage reading. After investigation, i found out that it is due to distant lightning discharge.

Regards....

[WM6]

Gold Gun apply simplified, but otherwise known and patented principle (still sold in more sophisticated equipment).

Agree with Geo. About 20-30kHz working range could be optimal. If there is no outer existing transmitter signal, we depend on our own movable transmitter.

At least if you use Gemini II TX, it can be easily adapted to work at lower frequency. You only need to add one capacitor in TX tank circuit (about by factor 1.5 of existing Ctx). It can be removed when you wish to use Gemini in its primary function.

Regarding build GG it is all about directivity tuning.

[Geo]

Thank you for the suggestions Geo. I used the Gemini transmitter as local oscillator because i'm not sure what vlf frequency that can be heard in my country. So i downloaded software defined radio the SAQ free software to hear distant vlf transmissions although limited only up to 22 khz. Now i know what frequency to tune to because i hear a steady 5.0 khz 18.3 khz and 20.8 khz. I tuned my gold gun on these frequencies.
I use a dc millivoltmeter with low voltage drop diodes (bridge configuration) since i have no rms ac millivoltmeter. The result is that it is not accurate. I also notice a sudden increase in voltage reading. After investigation, i found out that it is due to distant lightning discharge.

Regards....

You must use a true rms meter. If you have not one then there are simple chips that are full true rms voltmeters. You can see the LTC1968.

[GOLDEN LILLY]

Thank You WM6 and Geo for your help. Now i understand clearly this type of detecting method. All i have to do now is to tune the gold gun to a correct frequency and see if it has a promising result. My other concern is how will i know if i detected a reflected signal? Will the gold gun nulls or will it give an increase in output voltage?

[Agraz]

you can use the transmitter to the black antenna of the Garret Master Hunter, I heard the vlf tone from the Garret in the Gold Gun at a distance of 30 meters

[Agraz]

You can use this configuration in page 9: manual pdf Magnacast 5000

http://www.gold-ftgusa.com/SiteFiles/ProductsFiles/document/FT9001-ar.pdf

English manual already removed in internet

http://www.longrangelocators.com/forums/showthread.php?t=13089&page=5

I will try to prove someday think it should work

[GOLDEN LILLY]

I have tried the idea of reflective detection using Gemini III Tx with my home made gold gun But i cannot determine if i have the reflective signal. It needs more experimenting...
I used Magnacast type detecting reflective signal for the test but again no result yet.

[WM6]

Only at bigger deposits in soil you can sense reflective signal, not at small target as coins.

[Geo]

I have tried the idea of reflective detection using Gemini III Tx with my home made gold gun But i cannot determine if i have the reflective signal. It needs more experimenting...
I used Magnacast type detecting reflective signal for the test but again no result yet.

The power of Gemini is very low for creating a secondary magnetic field from buried targets.