Nexus Coil Design

[Richard Lincoln (Sheddy)]

OK - I'll contact Georgi and come back with the reply.

Thank you

[Unregistered]

Georgi is here

But Georgi is here all the time. He is making a lot of these unregistered posts.georgi and his friends

[Qiaozhi]

I've just finished speaking to Georgi, and here's his reply:
But first I'd just like to say "Please don't shoot the messenger."

So far we have only heard one side of the story. Here's the other:

Georgi says that he did the make the detector that is in your possession. However, this detector pre-dates the Nexus. In fact it is the 3rd detector that he ever built, while he was still in the experimention phase. It was at your own insistence that he constructed this machine in a hurry, as you were being somewhat impatient. The quality of the coil that you have is (in Georgi's opinion) better than the current coils. It is an open frame type that took many hours to construct and is costly in terms of construction time. This type of coil has a higher Q factor and a lower frequency than the current models. It also has the lowest weight and the highest mechanical stability. The drawback is that the open frame type of coil looks homemade, even though it is superior in operation. It is just not ecomically viable to produce the open frame type, and a different method is used in the production models to reduce cost, and to make the detectors more pleasing to the eye. Georgi himself uses one of these open frame coils in his own personal detector.
I asked Georgi about the agreement, and he replied that yes you did have an agreement. But you have not contacted him for 3 years, and are now basically demanding a new detector. Since you were supplied with this "homemade" detector (long before the Nexus brand came into existence) there have been many "inprovements" to the design. Georgi does not feel that it is now appropriate that you should be demanding what is essentially a new detector after all this time, particularly since you appear to have been satisified with your original purchase for the past 3 years. The bottom line is that he does not want to respond to your demands.

Regarding the fact that Gary's website no longer contains any information on the Nexus is true. It was removed at the request of Nexus Detectors, pending some more "professional" information being made available. Gary and Georgi have a good relationship, and there is nothing mysterious going on there.

As far as the threat to disassemble the pre-Nexus detector and expose it's innards for the world to see, Georgi says for you to go ahead. You will never learn the Nexus secret, even if you dissolve the coil and display the windings. There is nothing to learn about the electronics. The transmitter is the same 2-transistor type you've already seen in some other Bulgarian schematics, although the winding ratios are different. It uses a synchronous detector (not the diode-based one refered to by Sean) which is similar to the Bandido and a hundred other similar designs. In fact, Georgi even said I could post the actual Nexus schematic onto this forum, because the secret is not to be found there. Yes - I do have a copy, in case you're wondering. And no - I'm not going to post it. So don't even bother asking.

Basically - you have Georgi's permission to disassemble the detector in your possession and put it on display. It should keep certain people busy for a very long time...

[Qiaozhi]

But Georgi is here all the time. He is making a lot of these unregistered posts.georgi and his friends

I also asked Georgi about that, and he said he's not been posting as "unregistered". It's some other trouble maker.

[Unregistered]

gone

Nexus gone from here too www.treasuredpast.co.uk/html/nexus

[Sean_Goddard]

I believe I read somewhere that Georgi was a louspeaker designer. If this is true, then this guy knows more about magnetics and their interactions with different metals than I know about breathing!!

I am of the opinion that having read ALL the posts, and his willingness to allow people to scrutinise his design, then this man knows a LOT more than he's letting on. Basically he's grinning at us whilst we run around making wild guesses about his invention..and GOOD LUCK TO HIM..

Even if we hit the mark, he's not going to tell us were right, the only way we can get even a facsimile of what he has created is by collective research and testing. Don't forget there is only ONE Georgi, but DOZENS of us . We should be able to get the time down to around a year or so before we get what we are looking for, and THEN WHAT?? Would ANY of us want to deprive Georgi of his just earned income? I for one would not. I'd buy a machine even if I could build it myself, why, because the guy deserves his hard work to be rewarded.

I'm not taking anyones side here, but I would be intrigued to see inside, just for the sake of having done so, but Richard, please don't wreck your machine just in a fit of pique, or to prove a point. SO many time I've done similar and regretted it after. Remember "You can please some of the people all of the time...etc"?

If you are unhappy because it is falling to bits, then I offer to MAKE GOOD all the broken bits, and missing decals for you as best I can (and that's usually acceptable to most). OK I may have to re-case the innards, but NO ONE will ever see what is inside if you say so. I'll even do it AT COST, and I'll post the bills for parts here for all to see. Can I offer more than that?

[Max]

I've just finished speaking to Georgi, and here's his reply:
But first I'd just like to say "Please don't shoot the messenger."

So far we have only heard one side of the story. Here's the other:

Georgi says that he did the make the detector that is in your possession. However, this detector pre-dates the Nexus. In fact it is the 3rd detector that he ever built, while he was still in the experimention phase. It was at your own insistence that he constructed this machine in a hurry, as you were being somewhat impatient. The quality of the coil that you have is (in Georgi's opinion) better than the current coils. It is an open frame type that took many hours to construct and is costly in terms of construction time. This type of coil has a higher Q factor and a lower frequency than the current models. It also has the lowest weight and the highest mechanical stability. The drawback is that the open frame type of coil looks homemade, even though it is superior in operation. It is just not ecomically viable to produce the open frame type, and a different method is used in the production models to reduce cost, and to make the detectors more pleasing to the eye. Georgi himself uses one of these open frame coils in his own personal detector.
I asked Georgi about the agreement, and he replied that yes you did have an agreement. But you have not contacted him for 3 years, and are now basically demanding a new detector. Since you were supplied with this "homemade" detector (long before the Nexus brand came into existence) there have been many "inprovements" to the design. Georgi does not feel that it is now appropriate that you should be demanding what is essentially a new detector after all this time, particularly since you appear to have been satisified with your original purchase for the past 3 years. The bottom line is that he does not want to respond to your demands.

Regarding the fact that Gary's website no longer contains any information on the Nexus is true. It was removed at the request of Nexus Detectors, pending some more "professional" information being made available. Gary and Georgi have a good relationship, and there is nothing mysterious going on there.

As far as the threat to disassemble the pre-Nexus detector and expose it's innards for the world to see, Georgi says for you to go ahead. You will never learn the Nexus secret, even if you dissolve the coil and display the windings. There is nothing to learn about the electronics. The transmitter is the same 2-transistor type you've already seen in some other Bulgarian schematics, although the winding ratios are different. It uses a synchronous detector (not the diode-based one refered to by Sean) which is similar to the Bandido and a hundred other similar designs. In fact, Georgi even said I could post the actual Nexus schematic onto this forum, because the secret is not to be found there. Yes - I do have a copy, in case you're wondering. And no - I'm not going to post it. So don't even bother asking.

Basically - you have Georgi's permission to disassemble the detector in your possession and put it on display. It should keep certain people busy for a very long time...

Hi,
"You will never learn the Nexus secret, even if you dissolve the coil and display the windings. There is nothing to learn about the electronics. The transmitter is the same 2-transistor type you've already seen in some other Bulgarian schematics, although the winding ratios are different. It uses a synchronous detector (not the diode-based one refered to by Sean) which is similar to the Bandido and a hundred other similar designs. "

So at the end... I was right ?

If the secret is in the coil... any Bandido or GSabre have the potential to beat it by electronics (with same coil type and dimensions). No secrets in the electronics/schematic.
But the coil is the secret.

Yes, Georgi knows many things about coils. I'm sure of that.

I'm not involved in MD industry... so my interest is just "academic".
I have an idea of how his coil works... "different" !
But I'll keep that idea for me.

Think that for the experienced TH, Nexus is worth the big expence and also that the designer has the right of earning money from his project...expecially from a working one !

All the other diatribes here have nothing to do with technology understanding.

Kind regards,
Max

[Qiaozhi]

I believe I read somewhere that Georgi was a louspeaker designer. If this is true, then this guy knows more about magnetics and their interactions with different metals than I know about breathing!!

I am of the opinion that having read ALL the posts, and his willingness to allow people to scrutinise his design, then this man knows a LOT more than he's letting on. Basically he's grinning at us whilst we run around making wild guesses about his invention..and GOOD LUCK TO HIM..

Even if we hit the mark, he's not going to tell us were right, the only way we can get even a facsimile of what he has created is by collective research and testing. Don't forget there is only ONE Georgi, but DOZENS of us . We should be able to get the time down to around a year or so before we get what we are looking for, and THEN WHAT?? Would ANY of us want to deprive Georgi of his just earned income? I for one would not. I'd buy a machine even if I could build it myself, why, because the guy deserves his hard work to be rewarded.

I'm not taking anyones side here, but I would be intrigued to see inside, just for the sake of having done so, but Richard, please don't wreck your machine just in a fit of pique, or to prove a point. SO many time I've done similar and regretted it after. Remember "You can please some of the people all of the time...etc"?

If you are unhappy because it is falling to bits, then I offer to MAKE GOOD all the broken bits, and missing decals for you as best I can (and that's usually acceptable to most). OK I may have to re-case the innards, but NO ONE will ever see what is inside if you say so. I'll even do it AT COST, and I'll post the bills for parts here for all to see. Can I offer more than that?

Hi Sean,

Yesterday I sent you an email following your request for a favour.
No reply yet.

[Unregistered]

But Georgi is here all the time. He is making a lot of these unregistered posts.georgi and his friends

If ur so clairvoyant, why don't ya use ur skill and see how nexus is made so we can all know the secrets.

[Unregistered]

Nexus gone from here too www.treasuredpast.co.uk/html/nexus

Treasured past doesn't exist anymore, the site is in progress of being shut down.

[Unregistered]

Hi,
"You will never learn the Nexus secret, even if you dissolve the coil and display the windings. There is nothing to learn about the electronics. The transmitter is the same 2-transistor type you've already seen in some other Bulgarian schematics, although the winding ratios are different. It uses a synchronous detector (not the diode-based one refered to by Sean) which is similar to the Bandido and a hundred other similar designs. "

So at the end... I was right ?

If the secret is in the coil... any Bandido or GSabre have the potential to beat it by electronics (with same coil type and dimensions). No secrets in the electronics/schematic.
But the coil is the secret.

Yes, Georgi knows many things about coils. I'm sure of that.

I'm not involved in MD industry... so my interest is just "academic".
I have an idea of how his coil works... "different" !
But I'll keep that idea for me.

Think that for the experienced TH, Nexus is worth the big expence and also that the designer has the right of earning money from his project...expecially from a working one !

All the other diatribes here have nothing to do with technology understanding.

Kind regards,
Max

Hi Max, we're waiting for you to stop talking and start walking, if you're so good at making detectors, then start your own metal detecting company, then we can review your detectors.

[Richard Lincoln (Sheddy)]

George has stated that the G-tec Hunter is his work so no need to take the machine to peices. The whole purpose was to invince the nay-sayers that my machine is as I said it was. Could you pass on my thanks to George for that.

Sean, the only part of the machine that was "falling apart" was he wiring ion the battery box. This has been sorted out, it was something that even I was able to do! The labelling has all been duplicated and put back on the machine, I have a black-belt in photoshop. But thank you for your kind offer.

Qiaozhi, thanks for getting all of that clarified but just to clarify it further, what I requested from George was an exchange of the coil and stem. With those two changes my machine is immediately recognisable as a Nexus. Also, the reason for the rush in getting the machine in the first place was that George was immenantly moving to South Africa. I wanted the machine before he left and he wanted the money before he left. It was mutuasl impatience.

[Max]

Hi Max, we're waiting for you to stop talking and start walking, if you're so good at making detectors, then start your own metal detecting company, then we can review your detectors.

Hi,
Oh man... no.
I can't do.

I'm not really interested in MD (or TH in general) business... for me is just an hobby.

Have already too many things to think at... really few time... lot of work... and, most of all, I don't know if I could give any real improvement to the MD industry/scenario, I mean something new.

But I'm sure that, in the hypothesis of being involved that scenario, I'll made my detectors really realiable by factory... just to pass reviews !

That's a big challenge for any manifacturer I think !

Kind regards,
Max

[Unregistered]

S Africa

I Gorgi go to S Africa who will repair any Nexus then

[Qiaozhi]

George has stated that the G-tec Hunter is his work so no need to take the machine to peices. The whole purpose was to invince the nay-sayers that my machine is as I said it was. Could you pass on my thanks to George for that.

Sean, the only part of the machine that was "falling apart" was he wiring ion the battery box. This has been sorted out, it was something that even I was able to do! The labelling has all been duplicated and put back on the machine, I have a black-belt in photoshop. But thank you for your kind offer.

Qiaozhi, thanks for getting all of that clarified but just to clarify it further, what I requested from George was an exchange of the coil and stem. With those two changes my machine is immediately recognisable as a Nexus. Also, the reason for the rush in getting the machine in the first place was that George was immenantly moving to South Africa. I wanted the machine before he left and he wanted the money before he left. It was mutuasl impatience.

Hi Richard,

Glad to be of service.
If you need me to be a go-between again, just let me know.
There are a few people here who seem almost desperate to acquire the secret of the Nexus, but they are too scared to register. I'm pleased that you have decided not to disassemble the detector. It would be shame to destroy a perfectly good machine.

I've just re-examined the photo of your detector, and to be honest I cannot see the difference between the original Nexus stem and the one on your G-Tec Hunter. I know that the new Nexus Standard SE has a different stem, but the older quirky one actually works better. Georgi only changed to the new telescopic fibreglass stem because of market pressures, and to make production easier. As I stated earlier, Georgi personally uses an open-frame coil because of it's reduced weight and superior mechanical stability. The only difference between Georgi's coil and your own is the colour.

I'll pass on your thanks to Georgi.