Tesoro mods

[IowaRelic]

More specifically the vaquero. Hey, Sven, you made this post some time ago...
avatar
Re: Tesoro Vaquero "high tone" modification ?
Posted by: Sven
Date: August 12, 2016 10:00PM
Registered: 13 years ago
Posts: 4,296
If they are changing the IC chip and if its not a programable chip it can be done outside Tesoro.
IC chips are made up of resistors, capacitors etc.
So if you peel back the Tesoro label on the chip, it will reveal a chip part number, if it has not been wiped off.
You would need to compare the numbers on a high tone and low tone version..............


You would need to do this on a high tone and low tone version and compare.

If some one will do this, might be an easy mod.


Nokta/Makro Anfibio-Multi, Makro Multi-Kruzer, and few others
Self built Mirage Pi's --- they work great in trashy areas!!

Now that Tesoro’s warranty is probably a thing of the past, we could mod machines and just have more fun without worry!!! Not that I’m anxious to cut into my vaquero, but what if a simple mod could be done in the housing to allow an iron signal to hit on a low tone chip while all signals above iron hit on a high tone chip. I have a good understanding of electronics and this should be totally doable. Someone go try it then lmk how it works!!!


Reply Quote

 

[Sven]

Don't know how anyone can do it without the software code. Even Tesoro screwed themselves by losing the code for the Golden Sabre umax, so they were unable to keep producing them. Plus the circuit board would need a separate circuit for the two tone.....................

If it was possible to do, it would have been done years ago by the tinkerers.

Join Geotech Forums and just build yourself a Tesoro Golden Sabre Light and look for the added two tone circuit board mod.
------------------------------------------------------------------
An exploratory two tone mod was suggested, no one has tried it on a current Tesoro model.


To change Tesoro tone from low to high

Does anyone know what Tesoro does to change the tone from low to high?
I heard they re-program a chip? Or do they just put in a different chip that has a diff. resistor capacitor value somewhere in it?
------------------------------------------------------------
Yes, The -ve voltage is generated using a 4024 divider chip and a push pull stage (as per all their other machines). On THREE of the outputs of this chip is a diode OR matrix which combines the outputs into one then to the audio amp stage. Move ONE of these diodes along ONE leg on the chip so instead of dividing Ftx by say 64 to give the audio base tone, it divided by 128 (half the frequency as an output) and thus a lower overall tone.

Like this;
Find pin 5 and move the end of the diode that is connected to it to pin 6. Job done three minutes = LOW pitch mod (and NO profit for rip off modders)

Disconnect the ANODE of the diode which is connected to PIN5 of the IC and connect it instead to PIN6. This will LOWER the tone. IF you want a higher tone, then disconnect the ANODE of the diode from PIN 9 and connect it to PIN 11. This will give a HIGHER tone.

No advantage EXCEPT that the standard tone is around 800Hz, the higher one around 1600 (or something like that). The mod moves the tone into the range where the ear is usually most sensitive to small changes in amplitude, thus, in theory, giving the user better aural sensitivity to small signal changes

 

[IowaRelic]

Hmm I did not realize software was involved in an analog detector. Still, would be a great thing to figure out. It would transform the detector.

 

[Sven]

https://en.wikipedia.org/wiki/Programmable_Array_Logic

I have asked a number of years ago if any forum member would remove the sticker on the Tesoro IC chip to see if there was a manufacturer identification number on it. No one ever made a reply. I don't have a newer umax detector to check at this time.

 

[Carl-NC]

Many people consider Tesoro's to be analog detectors but most have micros that do the back-end processing. Tesoro uses PIC micros, not sure exactly which on on the Vaq. Wouldn't be an enormous task to replicate what they are doing, which always made me chuckle at the "lost Golden uMax code" debacle. Even if they didn't want to re-create it, for $200 there's a guy in China who will rip the code from an existing machine and hand you the source code.

 

[IowaRelic]

Many people consider Tesoro's to be analog detectors but most have micros that do the back-end processing. Tesoro uses PIC micros, not sure exactly which on on the Vaq. Wouldn't be an enormous task to replicate what they are doing, which always made me chuckle at the "lost Golden uMax code" debacle. Even if they didn't want to re-create it, for $200 there's a guy in China who will rip the code from an existing machine and hand you the source code.

I agree. Saying the code is lost is like something a video game developer would say! Still would LOVE a 2 tone vaquero.

 

[bklein]

Is this to result in a two tone detector or a one tone with different frequency?

 

[IowaRelic]

Is this to result in a two tone detector or a one tone with different frequency?

No change in frequency just use the stock low tone for iron and the higher tone for non ferrous items. It creates a hunting style for relics that allows for low disc with ability to pick out high tones from amidst the iron. Watch Aquachigger’s vids on YouTube using the Teknetics t2. It’s how I envision using a 2 tone machine