GOLD GUN AL707

[Geo]

One of my lrls locates a fresh gold coin at 20m easy and don't locate anything else on air test.
BUT inside the ground it detects and other noble metals.... so what fresh metal it detects does n't matter

[abdou2014]

check your mail Mr Geo !

[Long Ranger]

Gold Gun al707 Can Be Made To Work

I got my Gold Gun al-707 to work--but, it does require a transmitter. I located a Timber Baron's hoard of gold, from the 1930's Gold Act--at a distance of 0.82 miles away, here in western Washington State. The property is privately owned, as well as posted. I'm still searching for a private way to get in there.....

I need Carl to sell me his Gold Guns, lickety-split......I'll even pay for the shipping........

[fever]

sorry,only have this model

[ATTACH]17641[/ATTACH]


[ATTACH]17643[/ATTACH]

Hi Morgan


what is the first schematic and third one ? there are two different lrl? or we have to make both of them to make a gold gun ?

sry for my awkward question because im new to this electronic parts

[kaveh]

Hello to all Please specify the name of the base of the transistor fet. (G s d) on the image Thank

[Pahom]

Hello to all Please specify the name of the base of the transistor fet. (G s d) on the image Thank

At least indicate which image you are talking about. Otherwise, your question will remain unanswered.

[WM6]

Hello to all Please specify the name of the base of the transistor fet. (G s d) on the image Thank

There is no "base" with FET transistor, only with regular BJT transistor:








So FET transistor "base" is named "Gate" (G).

Why different names for control input of both transistor?

Cause they (BJT and FET) work differently.







.

[kaveh]

Thank you so much dear friend Please also tell the exact specifications and size of the ferrites and the wire score. best wishes for you

[kaveh]

Hello I made this circuit. And I have a whistle at the output. I have two questions 1 Does the sound turn into a hiss when the metal senses? 2 Is it possible to output the output like a Franco circuit with two diodes and a half-wave capacitor that increases the voltage with the sense of metals?

[GOLDEN LILLY]

Hello everyone. I just want to know if the gold gun ferrite coils have the same or opposite direction of windings? If it is opposite, can someone explain why? Thank you.

[WM6]

.



Same direction (but there is critical tuning gap between two ferrite rods and tuning distance

between both windings with main goal to get best directivity / selection in mess of signals):

[GOLDEN LILLY]

Thank you for your answer WM6....
What is the advantage of two ferrites than single ferrite?
I notice that adjusting the ferrite distance changes the total inductance...which inductance should I calculate to get the resonannce, individual or total inductance?

[WM6]

What is the advantage of two ferrites than single ferrite?

Already said. Apart from fine tunning to given TX frequency it
allowed to improve antenna directivity to get better selectivity
between mess of reflected signals of same frequency.

I notice that adjusting the ferrite distance changes the total inductance...which inductance
should I calculate to get the resonannce, individual or total inductance?

It is about total inductance.
Despite ferrite rods used by homeworkers will not be the same as with original device,
it is better to stay with proposition of original number of turns (about 2 x 333 turns)
as coarse frequency set and tune to desired resonance frequency by changing
capacitor(s) value, rather than calculating antenna inductance (which will be not
dependable). If possible, use ferrite rods from old (cheap) portable ferrite radio.

We need to invest quite a more laborious activity in tuning to best directivity / selectivity
than to resonant frequency alone. Of course during directivity improvement, resonant
frequency should be obtained and retained.

Once tunned to best directivity / selectivity at one selected resonant frequency (best in
the midle of antenna tank circuit band, say here about 20kHz) there is no need to
(re)tune antenna again to other adjacent resonant frequencies of interest. At those
tuned position antenna rods and windings should be fixed by wax or hot glue. Any other
adjacent resonant frequency should be set by changing antenna tank circuit capacitors.

Best directivity / selectivity tuning at given TX frequency is most laborious work with GG
AL718 project. Happy building.

[GOLDEN LILLY]

Thank you so much for the explanation WM6...