Tesoro Cibola

[hugo]

What noise interference?

Solution used in Lobo might not work here too.

Anyway, this schematic is full of mistakes, same as "Tejon" schematic.
Will not work anyway.
Good luck!

Dear Ivconic,
it will be fine if you can share your knowledge and so, you will be kind to tell us where are the mistakes.
Thanks by advance.
Hugo

[ivconic]

Dear Ivconic,
it will be fine if you can share your knowledge and so, you will be kind to tell us where are the mistakes.
Thanks by advance.
Hugo

Tejon is complete mess. Many pins swapped. Phase detectors&sync. demodulators are huge mess up.
Many components values are wrong.
It is pointless to name each mistake because there are many.
Cibola too.
Ok, for example; just analyze U6 and U6.1 at it and there is no need me to explain.
U3 also.
...
I don't suspect good intentions of the one who tried to trace it out; but it is not possible to trace it out and be 100% sure until all the components being removed from pcb.
Because there are too many vias and traces hidden under the ic's and many of them can't be simply checked using ohm meter.
I will not talk about details here because Tejon and Cibola are not discontinued models yet,
those are still actual on market and i think it is simply against ethic to disclose their schematics here in public.
But, simply; trust me, those schematics are not good and if you made them - they will not work.
I don't want to act too smart here, just want to spare our friends here from wasting time and money on something which will not work.
Cheers!

[hugo]

Hello Ivconic,
Thank you for your answer.

I don't suspect good intentions of the one who tried to trace it out; but it is not possible to trace it out and be 100% sure until all the components being removed from pcb.

So do I.

I will not talk about details here because Tejon and Cibola are not discontinued models yet,

You're right.

those are still actual on market and i think it is simply against ethic to disclose their schematics here in public.

I disagree, when I was young (Last century), many electronic devices were delivered with an instruction manual together with the schematic (TV set, HIFI system, so on ...).
Why the Hell, can't I have the schematic of my detector ? There is nothing wrong with that ! Everyboby can buy a technical manual for his car including wiring, sizing, setting and so on. Why it is impossible for a MD ?
The manufacturers may say : if I give a schematic with my MD, everybody gonna copy it. Seriously, how many detectorists can do such a thing ? 0,1% ? Mayby less. Do you think the people able to copy and re-manufactured these device are waiting for a schematic to be publish on Geotech ?
But a lot of them (detectorists) would like to be able to repair ot tweak freely their MD. When my Coinmaster 5000D power supply has burnt, I was pleased to received a schematic from White's !
Anyway, Thank you for all you have done (and you do) on Geotech website.
Have a nice day,
Hugo
PS : I'm not angry

[kt315]

hugo, wait the wind of change from east. I see these people they open Tejon and Cibola. really I fully desoldered King Cobra, all components were measured by my hands. this is why there is not mistake in my schematic althought Lahr's schematic has its a bunch. Ivconic is right - do not waste your time on very crude project. Christopher Kolumbus did try to discovery India, but open America. because he had not good detailed maps. that is the good example.

[hugo]

Hello kt315,
The wind is blowing from Russia.

really I fully desoldered King Cobra

It's not so easy with a SMD board. Even harder if the components are glued to the board.
But if we can, it's the best way to do.
Be sure, It's not a waste of time to try to understand how it works.

Christopher Kolumbus did try to discovery India, but open America. because he had not good detailed maps. that is the good example.

Do you think I'll find the DeLeon schematic on my road ?
Wait and see.
Best regards,
Hugo

[kt315]

hi Hugo, if the components are glued they easy get out desoldering. hot does its deal. I do not see difficulty. there is only maybe ceramic capacitors, you have to measure everyone, because they are often not marked.
take all files you see in the forum - fixed diagrams, LAY of SMD, LAY of through hole board etc.
be with this folk http://www.md4u.ru/viewtopic.php?f=2...9a17d&start=25

do not wait the wind from west. west is catched in a web of patents and copyright. one russian guy wrote that ebay has been closed for RU zine if anyone want to buy anything of hi-tech. he did want to buy ERBIUM LASER HEAD with MIRRORS FLASH LAMP CAVITY OPTICS ssy-1 yag neodymium but the items are closed in search for him.

Unfortunately, access to this particular item has been blocked due to legal restrictions in some countries. We are blocking your viewing in an effort to prevent restricted items from being displayed. Regrettably, in some cases, we may prevent users from accessing items that are not within the scope of said restrictions because of limitations of existing technology. Please accept our apologies for any inconvenience this may cause, and we hope you may find other items of interest on eBay.

[Qiaozhi]

Unfortunately, access to this particular item has been blocked due to legal restrictions in some countries. We are blocking your viewing in an effort to prevent restricted items from being displayed. Regrettably, in some cases, we may prevent users from accessing items that are not within the scope of said restrictions because of limitations of existing technology. Please accept our apologies for any inconvenience this may cause, and we hope you may find other items of interest on eBay.

Blocking sites on the internet is almost a waste of time. You only have to find a list of free proxy servers, like this ->
http://www.proxy4free.com/list/webproxy1.html
Pick one, and enter the IP address in the manual proxy configuration field of your browser. Then you can surf anonymously and also view any blocked sites. Another way is to use a Web Proxy like "hidemyass" ->
www.hidemyass.com

[hugo]

Hi,
Fresh (and good) news from Russia :




Looks working fine.
Regards,
Hugo

[GSL]

Hi,
Fresh (and good) news from Russia :
Looks working fine.
Regards,
Hugo

Not only looks working. The scheme really works.
The amplitude Tx = 25 V pp, pleasant sound.
Regards, GSL

[hugo]

Not only looks working. The scheme really works.
The amplitude Tx = 25 V pp, pleasant sound.
Regards, GSL

Hi GSL,
Thank you for your work !
Have you fully test the board ? All-Metal, Disc ?
What is the detection range ?
Best regards,
Hugo

[GSL]

I have not fully tested the board, GB has not been adjusted. Modes All Metal-discrimination work. It is too early to talk about sensitivity, but there is good sensitivity to gold and silver coins.
Best regards,
GSL

[Legaucho]

I have not fully tested the board, GB has not been adjusted. Modes All Metal-discrimination work. It is too early to talk about sensitivity, but there is good sensitivity to gold and silver coins.
Best regards,
GSL

Hello GSL

What about your tests, Did you get a good result?
Kind regards

[GSL]

I can get the tests only on weekends. I have not free time during the week

[GSL]

GB adjusted - the device is well cut off the iron and ferrite.

[ivconic]

With additional infos that i got recently; i made corrections in Cibola schematic and finally made it.
There are many differences between "original" one and the one i made.
The one i made now is working indeed decent.
So far i tested it ONLY in DISC mode and therefore i can't claim anything relating to All Metal mode and Nonmotion.
I get decent air distances for various items.
GEB is working just nice; rejects all minerals, ferrite etc...
Disc is working excellent!
Treshold is working, Sense is working... seems everything is on it's place.
I couldn't obtain some of "original" ic's so i made series of checks and tests and established most proper ic's for present conditions that i have now.
Funny thing, but TL061 is performing very well at RX front end!?
Much better than a pile of other types that i tested!
I intentioanlly wanted to avoid second 4053 and instead i will use ordinary mechanical switches, by now i only made wire jumpers so to settle it only in Disc mode.
Also i intentionally wanted to avoid use of CD4024 and instead i used simple VCO taken from White's Classic schematic.
Without additional buffering; 7660 will not synchronize directly via resistive coupling so i used most simple method: capacitive coupling!
What to say? This thing is working and it is working indeed very decent!
I have original Tesoro coil (for Tejon, Cibola and Vaquero) and all the checks i did with it.
Cheers!