Hi

[ivconic]

Can I use L7809CV regulator instead of lm7809?

Yes.

[Hach]

[ATTACH]49304[/ATTACH]

������ Thanks very much

[hooby life]

hello ivca ...Since you came back to talk about swm .i make smw its my best hooby detector
.but whay he never detect gold or ring !
regards...

[ivconic]

hello ivca ...Since you came back to talk about swm .i make smw its my best hooby detector
.but whay he never detect gold or ring !
regards...

[Toros]

hello ivca ...Since you came back to talk about swm .i make smw its my best hooby detector
.but whay he never detect gold or ring !
regards...

It never detect gold or ring or can not detect? Please explain exactly what you mean?

[hooby life]

Im sorry he can not detect gold .

[WM6]

Im sorry he can not detect gold .

All VLF's are able to detect gold, if proper build and tuned.

For small gold like small nuggets, earrings and alike you need small coil (say about 6")
and discrimination set to "all metal" (mean zero discrimination).
Even better if you have "Real All Metal" option instead of zero discrimination only.

[hooby life]

All VLF's are able to detect gold, if proper build and tuned.

For small gold like small nuggets, earrings and alike you need small coil (say about 6")
and discrimination set to "all metal" (mean zero discrimination).
Even better if you have "Real All Metal" option instead of zero discrimination only.

I have hime made 27 cm DD coil . test with 0.5 gram gold nothing .

[ivconic]

I have hime made 27 cm DD coil . test with 0.5 gram gold nothing .

[hooby life]

Im biginer ivca soory .smw is my first diy md .

[ivconic]

Im biginer ivca soory .smw is my first diy md .

Now seriously.
0.5 gram of gold... what shape, size?
if just a grain; than Minelab marketing and sale experts would be real yoyos to place such hot prices on their products, right?
Who would even think to buy any of their product if such grain can be easily detected with obscure diy as SMW is?
On the other side; 0.5 gram of gold can be hammered in a coin form, presenting larger "area" and yet possible to be detected even with general purpose machine.
I really can not tell about 0.5 gram gold. Never had such target to experiment with.
What i can tell is that once i detected hammered gold coin, 0.7 gram weight, at ~15cm depth with SMW.
Of course it was not pure gold, it was gold alloy, some medieval Turkish coin.
That's what i can tell only.
But if we talking about grains and ore... well... Minelab is one of the possible solution, SMW is not.

[hooby life]

Now seriously.
0.5 gram of gold... what shape, size?
if just a grain; than Minelab marketing and sale experts would be real yoyos to place such hot prices on their products, right?
Who would even think to buy any of their product if such grain can be easily detected with obscure diy as SMW is?
On the other side; 0.5 gram of gold can be hammered in a coin form, presenting larger "area" and yet possible to be detected even with general purpose machine.
I really can not tell about 0.5 gram gold. Never had such target to experiment with.
What i can tell is that once i detected hammered gold coin, 0.7 gram weight, at ~15cm depth with SMW.
Of course it was not pure gold, it was gold alloy, some medieval Turkish coin.
That's what i can tell only.
But if we talking about grains and ore... well... Minelab is one of the possible solution, SMW is not.

I test with earning gold . size about 1cm my be 0.5gram

[ivconic]

I test with earning gold . size about 1cm my be 0.5gram

Despite the fact that earning is usually in circular form (maybe not in your case, can't tell without photo); still most of the earnings are "open loop" in eyes of the detector.
Much harder to detect than "closed loop" targets.
Due simple reason; dispersion of the eddy currents.
Now, if we take the same earning and weld the ends, to form the "closed loop"; detection of it will be much easier and better.
Point is in shape and form.
Magnetic features of the given metal comes on second place.

[hooby life]

Despite the fact that earning is usually in circular form (maybe not in your case, can't tell without photo); still most of the earnings are "open loop" in eyes of the detector.
Much harder to detect than "closed loop" targets.
Due simple reason; dispersion of the eddy currents.
Now, if we take the same earning and weld the ends, to form the "closed loop"; detection of it will be much easier and better.
Point is in shape and form.
Magnetic features of the given metal comes on second place.

Thanks ivca
That mean test with another target like gold coin or ring..

[ivconic]

Thanks ivca
That mean test with another target like gold coin or ring..

Jewelry as such earnings, chains with small links and similar; are presenting horrific targets for most of the common detectors.
Any awkward shapes that disperses the eddy currents like that.
SMW is not the exception. It will struggle with such targets.
But it will perform very good on targets like coins, rings and similar.
SMW is one of the "deepest" diy i ever made. General purpose nature. Usual targets in our hobby.
In my case; coins. Ancient coins, mostly made of bronze and similar alloys.