Quote:
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Originally Posted by mikebg
Ban, AL718 operates with a primitive principle. The correct principle is described in patent US 3,500,175.
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From what I can see, the Gold Gun was intended to find a null point in VLF reception, when monitoring a VLF transmission from a distant transmitter. The Gold Gun appears to be a simple circuit designed to detect the direction of a null rather than to find the precision and depth of information that could be extracted from the instrument Vaino Ronka patented. It appears the Gold Gun was intended to find a compass direction where the two coils on the ferrites received identical signals, without any attempt to measure phase variations or total signal strength. The idea is if you point the Gold Gun toward buried metal, the signal from each of the ferrite coils will balance to cancel each other, while one side will be stronger if you are pointing away from the buried metal. It seems a questionable proposition, but could work in theory if there is a transmitter operating at the frequency the Gold Gun is tuned to.
Since the transmitters the Gold Gun is tuned to have been shut down, we can expect it cannot possibly work. A solution to make it operational would be to insert an adjustable capacitor to replace the switch with the 820 and 47nf capacitors. If we had an adjustable capacitor there, then we could adjust the capacitor to tune the Gold Gun to a VLF station that is broadcasting. When we find that station, then we can substitute the capacitor for a permanent fixed capacitor which is tuned to a working transmitter instead of wondering why the Gold Gun does not receive any signal. As long as we have the Gold Gun tuned to a transmitter that is broadcasting, we can experiment to see if it detects anything buried.
The entire Gold Gun circuit seems very simple to me... about the same complexity as a Zahori in its original design before hackers removed the cmos filter/switch-timer and converted it to a simple amplfier. At least the Gold Gun has a differential input which could concievably detect something if we are lucky. The principle of VLF detection of buried things is sound, and has been used for years by geologists with their VLF loops.
But does the Gold Gun work in practice when we tune to a transmitter?
Most people say no... A few said yes.
Only way to know is to try it.
Some samples of what people found from the Gold Gun:
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Originally Posted by Carl-NC
"I own a Gold Gun AL718. Couldn't get much out of it, and I've never heard of anyone else who has had success with one. Still, I'd like to get mine into an area where there's more natural gold, and see what it does. Based on what I know of Accurate Locators, I don't expect much of it".
http://www.geotech1.com/forums/showp...38&postcount=2
originally posted by Tim Williams
"...I could not get the gold gun I had to work. But that may be because the signal was not being transmitted. This unit has a transmitter. I can't say if it will work or not. I just wanted to let everyone know there was one on ebay".
http://www.geotech1.com/forums/showp...1&postcount=71
originally posted by Agraz
"I build that model Gold Gun AL718, diagram post for Tim Williams, and work well, but is best put a transmitter with rods in ground, I dont try it".
http://www.geotech1.com/forums/showp...5&postcount=81
originally posted by Geo
"..Many people constructed it at Greece, without results 
Few weeks ago, when i went to Olympus for treasure hunting, there was two people who had a GG clone. No results..."
http://www.geotech1.com/forums/showp...5&postcount=82
originally posted by alnamr
"Hi to all
I made this device but there was no sound except confusion
See photos  "
http://www.geotech1.com/forums/showp...6&postcount=99 |
Best wishes,
J_P