Want to change your Cibola from high to low to high tones??

[Sven]

This is speculation on my part. But, it seems Tesoro will change your Cibola from low to high tones for a small fee. I can't see them actually resoldering some part to your board, I maybe wrong. Think all they do is change the IC chip which is made up of resistors and caps that also change tone. If correct, all they do is pop out your chip and put in a different one.

You can do this yourself, if you know the correct chip.

Your chip will be marked Cibola 1.0 when it comes with the low tone. If anyone with the high tone will check the chip inside their Cibola it may have a different number.
If it does then all you need to do is change the chip out.

Only problem you don't know what the chip is. I am assuming once again that they just put that white Cibola sticker over the chip ID part # and hopefully didn't wash the number off.
Cibola owners would have to carefully peel back that white sticker to see if the # is there. If it is, please make a post for Cibola 1.0 and any other white sticker.
I no longer own a Cibola to check.

If numbers are there we can easily find a source for the chips and you can then switch back and forth if you don't like either.

The worst case is that the chip is a programable one, in that case, nothing you can do , only the Techs at Tesoro.

Anyone know for sure?? Inquiring minds would like to know.

 

[Scully]

Do NOT go replacing the chip (IC) inside the Cibola, or anything else, unless you now what you are doing, AND, it will void your warranty. Tesoro will upgrade your machine to the high tone for a $15.00 fee, and all you have to do is send it back to the factory. I was told it only involves changing the value of one resistor.

Scully

 

[Sven]

Your right, not to do any mods unless you know what you are doing. Especially if you do not want to void your warranty.
A resistor is only a 10-60 cent item. If it is a resistor which is it? There was a discussion in another tech forum that it was a bit more than
a resistor. It was discussed that it was actually in the IC and the resistor value inside was reprogrammed to a diff. value. Sort of like a processor.
It's interesting to know how things are done.

 

[Shenandoah Digger]

Pretty sure I'd just pay the 15 bucks.

 

[Sven]

For the most part I would agree. Thought it would be nice if you could change back and forth in case you didn't like the high tone after you had it changed.
Just trying to save folks some bucks.

 

[dmckee17]

Thanks for the post, I enjoy reading about mods even though I don't own a Cibola. I'm a tinkerer at heart also.

 

[Keith Southern]

they dont change a resistor out .They just bump the hz tone up with a reprogram of the I.C. .heck they could probably set it anywhere in the spectrum.Its probably is just changing the resistance but its done inside the chip.If you could find the right pin or pins and put a VR in line you might be able to set it anywhere you like anytime like on the Tejon.

Maybe

Keith

 

[Topo]

I agree, I think the warranty worths more than 15 bucks

 

[Sven]

Yes that's what I also recently heard.

 

[Sven]

I searched back my original post on another forum from awhile ago.
Here are the answer I rec'd, use the info at your own risk.
=====================================================

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 soemthing 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

ADDED NOTE Suggested to add a dip switch so you can switch back and forth if you want

 

[Sven]

IC4024 specs

4024 7-bit (

 

[silversmith]

Hi Sven. Will this work in a Compadre as well? I see a 4024 on the schematic haven't located it on the circuit board yet. A tree position rotary switch could give all three tones.

 

[Goodrat]

I don't see a 4024 in this picture folks.